CA2462519C - Apparatus and method for reconstructing a ligament - Google Patents
Apparatus and method for reconstructing a ligament Download PDFInfo
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- CA2462519C CA2462519C CA002462519A CA2462519A CA2462519C CA 2462519 C CA2462519 C CA 2462519C CA 002462519 A CA002462519 A CA 002462519A CA 2462519 A CA2462519 A CA 2462519A CA 2462519 C CA2462519 C CA 2462519C
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- Prior art keywords
- graft ligament
- transverse
- support block
- graft
- fixation pin
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1714—Guides or aligning means for drills, mills, pins or wires for applying tendons or ligaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0805—Implements for inserting tendons or ligaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1675—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the knee
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/062—Measuring instruments not otherwise provided for penetration depth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0817—Structure of the anchor
- A61F2002/0823—Modular anchors comprising a plurality of separate parts
- A61F2002/0829—Modular anchors comprising a plurality of separate parts without deformation of anchor parts, e.g. fixation screws on bone surface, extending barbs, cams, butterflies, spring-loaded pins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0847—Mode of fixation of anchor to tendon or ligament
- A61F2002/0852—Fixation of a loop or U-turn, e.g. eyelets, anchor having multiple holes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0876—Position of anchor in respect to the bone
- A61F2002/0882—Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/907—Composed of particular material or coated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/907—Composed of particular material or coated
- Y10S606/908—Bioabsorbable material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/907—Composed of particular material or coated
- Y10S606/909—Bone
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/907—Composed of particular material or coated
- Y10S606/91—Polymer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/916—Tool for installing or removing orthopedic fastener
Abstract
A method and apparatus for reconstructing a ligament. In one preferred form of the invention, there is provided a graft ligament support block (100) which comprises a body (105), and a graft hole (110) and a transverse fixation pin hole (115) extending through the body (105), with both the graft hole (110) and the transverse fixation pin hole (115) preferably extending substantially perpendicular to the longitudinal axis of the body (120). And in one preferred form of the invention, the invention also comprises an installation tool (200). In one preferred method of use, a graft ligament (35) is looped through the graft hole (110) in the graft ligament support block (100), and the graft ligament support block (100) is mounted to the installation tool (200). Then the installation tool is used to advance the graft ligament support block (100) into the bone tunnel (20), with the two free ends of the looped graft ligament extending back out the bone tunnel (20).
Description
APPARATUS PuD METHOD FOR
RECONSTRUCTING A LIGAMENT
Reference To Pending Pr_or Patent Abnlication This patent application clai:is berefit of prior U.S. Provisional ?atent zpplication Serial No.
60/326,351, filed 10/01/01 by Paul Re et al. for APPARATUS P.ND METHOD FCR RECONSTRUCTING A LIGA.NENT
(=ttorney`s Docket No. SCAN-2 ?ROV),~
Field Of The Invention This invention relates to surgical Gpoaratus and procedures in general, and more particularly.to surgical apparatus and procedures for reconstructing a ligament.
Background Of The Invention A ligament is a piece of fibrous tissue which connects one bone to another.
Ligaments are frequently damaged (e.g., detached or torn or ruptured, etc.) as the result of injury and/or accident. A damaged ligament can cause
RECONSTRUCTING A LIGAMENT
Reference To Pending Pr_or Patent Abnlication This patent application clai:is berefit of prior U.S. Provisional ?atent zpplication Serial No.
60/326,351, filed 10/01/01 by Paul Re et al. for APPARATUS P.ND METHOD FCR RECONSTRUCTING A LIGA.NENT
(=ttorney`s Docket No. SCAN-2 ?ROV),~
Field Of The Invention This invention relates to surgical Gpoaratus and procedures in general, and more particularly.to surgical apparatus and procedures for reconstructing a ligament.
Background Of The Invention A ligament is a piece of fibrous tissue which connects one bone to another.
Ligaments are frequently damaged (e.g., detached or torn or ruptured, etc.) as the result of injury and/or accident. A damaged ligament can cause
- 2 -instability, impede prcper motion of a joint and cause pain.
Various procedures have been developed to repair or replace a damaged liaament. The specific procedure used depends on the particular ligament which is to be restored and on the extent of the damage.
One ligament which is frequently damaged as the result of injury and/or accident is the anterior cruciate ligament (i.e., the =_CL). Lookina first at Figs. 1 and 2, it will '--e seen that the ACL 5 extends between the top of the tibia 10 and the bottom of the femur 15. A damaged ACL can cause instability of the knee joint and cause substantial pain and arthritis.
Numerous procedures have been developed to restore a damaged ACL through a graft ligament replacement. In general, and looking next at Fig. 3, these ACL
replacement procedures involve drilling a bone tunnel up through tibia 10 and drilling a bone tunnel 25 up into femur 15. In some cases the femoral tunnel 25 may 20 be in the form of a blind hole and terminate in a distal end surface 30; in other cases the femoral tunnel 25, or an extension of the femoral tunnel 25, may pass completely through femur 15. Once tibial
Various procedures have been developed to repair or replace a damaged liaament. The specific procedure used depends on the particular ligament which is to be restored and on the extent of the damage.
One ligament which is frequently damaged as the result of injury and/or accident is the anterior cruciate ligament (i.e., the =_CL). Lookina first at Figs. 1 and 2, it will '--e seen that the ACL 5 extends between the top of the tibia 10 and the bottom of the femur 15. A damaged ACL can cause instability of the knee joint and cause substantial pain and arthritis.
Numerous procedures have been developed to restore a damaged ACL through a graft ligament replacement. In general, and looking next at Fig. 3, these ACL
replacement procedures involve drilling a bone tunnel up through tibia 10 and drilling a bone tunnel 25 up into femur 15. In some cases the femoral tunnel 25 may 20 be in the form of a blind hole and terminate in a distal end surface 30; in other cases the femoral tunnel 25, or an extension of the femoral tunnel 25, may pass completely through femur 15. Once tibial
3 PCT/US02/31036 tunnel 20 and femoral tunnel 25 have been formed, a graft ligament 35, consisting of a harvested or artificial ligament or tendon(s), is passed up through tibial tunnel 20, across the interior of the knee joint, and up into femoral tunnel 25. Then a distal portion of graft ligament 35 is secured in femoral tunnel 25 and a proximal portion of graft ligament 35 is secured in tibial tunnel 20.
There are currently a n u-_'-zr of diffeyent ways to secure a graft ligament in a -.cne tunnel. One way is to use an interference screw 40 (Fig. 4) to wedge the graft ligament against an opposing side wall of the bone tunnel. Another way is to suspend the graft ligament in the bone tunnel with a button 45 and a suture 50 (Fig. 5) or with a crosspin 55 (Fig. 6).
Still another way is to pass the graft ligament completely through the bone tunnel and affix the graft ligament to the outside of the bone with a screw 60 and washer 65 (Fig. 7) or with a staple (not shown).
The "Gold Standard" of ACL repair is generally considered to be the so-called "Bone-Tendon-Bone"
fixation. In this procedure, a graft of the patella tendon is used to replace the natural ACL. Attached to the opposing ends of the harvested tendon are bone grafts, one taken from the patient's knee cap (i.e., the patella) and one taken from the patient's tibia (i.e., at the location where the patella tendon normally attaches to the tibia). The graft ligament is then deployed in the bone tunnels, with one bone graft being secured in the femoral tunnel with an interference screw and the other bone graft being secured in the tibial tunnel with another interference screw. Over the years, this procedure has generally yielded a consistent, strong and reliable ligament repair. However, this nrocedure is also generally considered to be highly invasive and, in many cases, quite painful, and typically leaves unsightly scarring on the knee and a substantial void in the knee cap.
As a result, alternative procedures have recently been developed that incorporate the use of soft tissue grafts such as the hamstring tendon. However, soft tissue grafts such as the hamstring can be difficult to stabilize within a bone tunnel. More particularly, the use of an interference screw to aggressively wedge the hamstring against an opposing side wall of the bone tunnel can introduce issues such as graft slippage, tendon winding, tissue necrosis and tendon cutting.
Furthermore, the use of a suture sling (e.g., such as that shown in Fig. 5) and/or a crosspin (e.g., such as that shown in Fig. 6) to suspend the hamstring within the bone tunnel can introduce a different set of issues, e.g., it has been round that the suture sling and/or crosspin tend to permit the graft ligGment to move laterally within the bone tunnel, with a so-called "windshield wiper" effect, thereby impeding ingrowth between the graft ligament and the host bone and/or causing abrasion and/or other damage to the graft tissue. In addition, the use of a crosspin (e.g., such as that shown in Fig. 6) to secure a hamstring within the bone tunnel can introduce still other issues, e.g., difficulties in looping the hamstring over the crosspin, or tearing of the hamstring along its length during tensioning if and where the crosspin passes through the body of the hamstring, etc.
Summary Of The Invention As a result, one object of the present invention is to provide improved apparatus for reconstructing a ligament, wherein the acparatus is adapted to permit the graft liaament to be fash;oned out of various soft tissue grafts, e.g., alloarafts, autografts, xenografts, bioengineered tissue grafts or synthetic grafts, and further wherein the graft is intended to be secured in place using a transverse fixation pin.
Another object of tre present invention is to provide an improved met::od fcr reconstructing a ligament, wherein the -.ethcd is adapted to permit the graft ligament to be fashioned cut of various soft tissue grafts, e.g., allografts, autografts, xenografts, bioengineered tissue grafts or synthetic grafts, and further wherein the graft is intended to be secured in place using a transverse fixation pin.
These and other objects are addressed by the present invention which comprises, in one preferred form of the invention, the provision and use of a graft ligament support block which comprises a body, and a graft hole and a transverse fixation pin hole extending through the body, with both the graft hole and the transverse fixation pin hole preferably extending substantially perpendicular to the longitudinal axis of the body. In one preferred form of the invention, the invention also comprises an installation tool for inserting the graft ligament support block into the bone tunnel and, while supporting the graft ligament support block in the bone tunnel, forming a transverse tunnel in the host bone, with the transverse tunnel in the host bone being aligned with the transverse fixation pin hole in the graft ligament support block.
In one preferred method of use, a graft ligament is looped through the graft hole in the graft ligament support block, and the graft ligament support block is mounted to the installation tool. The two free ends of the graft ligament are then preferably secured to a proximal portion of the installation tool under tension, whereby to tie down the two free ends of the graft ligament. In addition to controlling the two free ends of the graft ligament, this arrangement will also help hold the graft ligament support block to the installation tool. Then the installation tool is used to advance the graft ligament support block through the tibial tunnel, across the interior of the knee joint, and up into the femoral tunnel, with the two free ends of the looped graft ligament extending back out through the tibial tunnel. Next, a transverse tunnel is formed in the host bone, with the transverse tunnel being aligned with the transverse fixation pin hole in the graft ligament support block. Then the graft ligament support block is secured in place by pinning the graft ligament support block within the femoral tunnel, i.e., by advancing a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament sunport block. Then the two free ends of the looped graft ligament are released from the installation tool, the installation tool is detached from the graft ligament support block, and the installation tool is withdrawn from the surgical site. Finally, the two free ends of the looped graft ligament are secured to the tibia, thus completing the ACL repair. If desired, the tibial attachment can be effected using a second graft ligament support block.
Brief Description Of the Drawings These and other objects and features of the present invention will be more fully disclosed or rendered obvious by the following detailed description of the preferred embodiments of the invention, which is to be considered together with the accompanying drawings wherein like numbers refer to like parts and further wherein:
Fig. 1 is a schematic view of a knee joint, as viewed from the anterior side;
Fig. 2 is a schematic view of a knee joint, as viewed from the posterior side;
Fig. 3 is a schematic view of a generic ACL
reconstruction;
Fig. 4 is a schematic view of an ACL
reconstruction effected using an interference screw;
Fig. 5 is a schematic view of an ACL
reconstruction effected using a suture sling;
Fig. 6 is a schematic view of an ACL
reconstruction effected using a crosspin;
Fig. 7 is a schematic view of an ACL
reconstruction effected using a screw and washer;
Fig. 8 is a schematic view of a graft ligament support block formed in accordance with the present invention;
Fig. 9 is a partially exploded view showing the graft ligament support block of Fig. 8 and an installation tool for deploying the same;
Figs. 10-12 are various views showing the graft ligament support block of Fig. 8 mounted to the distal end of the installation tool shown in Fig. 9;
Fig. 13 is a partial perspective view showing details of the proximal end of the installation tool shown in Fig. 9;
Fig. 14 is a side view, partially in section, showing further details of the construction of the installation tool shown in Fig. 9;
Fig. 15 is a side sectional view of the installation tool's drill sleeve;
Fig. 16 is a perspective view of a transverse fixation pin which may be used in conjunction with the graft ligament support block of Fig. 8 and the installation tool of Fig. 9;
Figs. 17-33 are a series of schematic views showing an ACL reconstruction being effected in accordance with the present invention;
Fig. 34 is a schematic view showing another form of graft ligament support block formed in accordance with the present invention;
Fig. 35 is an enlarged side view showing an alternative construction for a portion of the installation tool;
Fig. 36 is a sectional view taken along line 36-36 of Fig. 35;
Fig. 37 is a schematic view showing a reamer drill guide formed in accordance with the present invention;
Fig. 38 is a schematic view showing the reamer element of the reamer drill c;~ide shown in Fig. 37; and Figs. 39-44 are a series of schematic views showing an ACL reconstruction being effected in accordance with the present invention.
Detailed Descrintion Of the Preferred Embodiment Looking next at Fig. 8, there is shown a graft ligament support block 100 which comprises one preferred form of the invention. Graft ligament support block 100 comprises a body 105, and a graft hole 110 and a transverse fixation pin hole 115 extending through body 105, with both graft hole 110 and transverse fixation pin hole 115 preferably extending substantially perpendicular to the longitudinal axis 120 of body 105. In one preferred form of the invention, graft hole 110 and transverse fixation pin hole 115 extend diametrically across body 105, with graft hole 110 and transverse fixation pin hole 115 extending substantially parallel to one another. Preferably graft hole 110 resides closer to the proximal end 125 of body 105 than transverse fixation pin hole 115, and transverse fixation pin hole 115 resides closer to t*ne distal end 130 of body 105 than graft hole 110. In one p-referred form of the invention, the distal end of body 105 has a circular cross-section, although it may also have an oval cross-section or a polygonal cross-section (e.g., square or rectangular or triangular, etc.). In one preferred construction, the distal end of body 105 has a cross-section sized just slightly smaller than the diameter of the bone tunnel, so as to provide a close interface between body 105 and the walls of the bone tunnel. In one preferred form of the invention, the distal end 130 of body 105 is tapered so as to facilitate advancement of graft ligament support block 100 through a bone tunnel. And in a preferred form of the invention, the proximal end of body 105 is sculpted away, e.g. such as shown at 135, so as to provide more room for a graft ligament looped through graft hole 110 and extending distally therefrom. Body 105 also includes a pair of recesses 140 for mounting body 10S to an appropriate installation tool, as will hereinafter be discussed in further detail.
If desired, graft ligament support block 100 may also include suture hole 145 for receiving a tow suture, as will hereinafter be discussed in further detail.
Additionally, if desired, the proximal end of graft hole 110 may be tapered as shown at 150 so as to provide a.less traumatic bearing surface for a graft ligament looped through graft hole 110, and/or the entrance of transverse fixation pin hole 115 may be tapered as shown at 155 so as to facilitate entry of a transverse fixation pin into transverse fixation pin hole 115.
Body 105 may be formed out of a polymer, a bioabsorbable or bioremodelable material, allograft bone, a metal, a ceramic, coral, a fiber composite, a composite including at least one of the foregoing, etc.
By forming body 105 out of a relatively strong material, the graft ligament can be held under tension even where body 105 is relatively small, or where one or more of the holes 110, 115 and/or 145 is located fairly close to the periphery of body 105.
Looking next at Figs. 9-15, there is shown an installation tool 200 which may be used in conjunction with graft ligament support block 100. Installation tool 200 generally comprises a holder 205 and an associated drill guide 210.
Holder 205 comprises a shaft 215 having a pair of finger 220 at its distal end and a handle 225 at its proximal end. Fingers 220 allow installation tool 200 to mate with, and releasably hold, graft ligament support block 100 by selectively fitting into the recesses 140 (Fig. 8) formed on the proximal end of graft ligament support block 100. See Figs. 9-12 and 14. In essence, fingers 220 and recesses 140 comprise a male/female connection; if desired, the locations of the male and female members may be reversed (i.e., with the male portion on support block 100 and the female portion on holder 205); or an alternative type of connection (e.g., a grasper) may be used. Preferably one or more suture posts 227 are formed on the proximal end of shaft 215 adjacent to handle 225. Suture posts 227 allow the two free ends of a graft ligament to be secured to the installation tool, as will hereinafter be discussed in further detail. Handle 225 allows installation tool 200 to be conveniently grasped by a user. Handle 225 includes a post hole 230. Post hole 230 allows drill guide 210 to be releasably secured to holder 205, as will hereinafter be discussed in further detail.
Drill guide 210 ccmprises an outrigger 235 having a threaded bore 240 (Fig. 14) formed in its distal end 245, and a slot 250 (Fig. 9) and post 255 at its proximal end 260. The end of post 255 is threaded, e.g., as shown at 265.
The threaded bore 240 (Fig. 14) in the outrigger's distal end 245 is sized to receive a drill sleeve 270 therein. Drill sleeve 270 has threads 275 along its length and terminates in a proximal head 280. Head 280 can be used to manually rotate drill sleeve 270 within the outrigger's threaded bore 240, whereby to move drill sleeve 270 relative to the distal end 245 of outrigger 235. A lumen 285 extends through drill sleeve 270.
Slot 250 and post 255 permit outrigger 235 to be releasably mounted to holder 205. More particularly, outrigger 235 may be mounted to holder 205 by fitting the holder's shaft 215 in the outrigger's slot 250 (Figs. 13 and 14), fitting the outrigger's post 255 in the holder's post hole 230, and then tightening nut 290 onto the threaded end 265 of oost 255.
As will hereinafter be dz-nscribed, graft ligament support block 100 and installation tool 200 are intended to be used in conjunction with a transverse fixation pin. One preferred transverse fixation pin 300 is shown in Fig. 16. Transverse fixation pin 300 generally comprises a solid shaft 305 terminating in a tapered distal end 310, and a ribbed (or barbed or threaded) section 315. A non-circular socket 320 is formed in the proximal end of transverse fixation pin 300, whereby transverse fixation pin 300 may be engaged by a driver.
An ACL reconstruction effected in accordance with the present invention will now be described.
First, the surgical site is prepared for the graft ligament, e.g., by clearing away the damaged ACL, etc.
Then a guidewire 400 (Fig. 17) is drilled up through tibia 10 and into the interior of the knee joint.
Preferably guidewire 400 is stopped short of engaging the bottom of femur 15 (Fig. 18). Then a cannulated tibial drill 500 (Fig. 19) is loaded onto guidewire 400 and drilled up through tibia 10 and into the interior of the knee joint (Fig. 20). Then cannulated tibial drill 500 is withdrawn back down the guidewire (Fig. 21), leaving a tibial tunnel 20.
Next, guidewire 400 is drilled an appropriate distance into the interior of femur 15. If desired, guidewire 400 may be drilled all the way through femur (Fig. 22), for reasons which will hereinafter be described. Then a cannulated femoral drill 600 (e.g., an acorn drill) is loaded onto guidewire 400 (Fig. 22), 15 passed through tibial tunnel 20, across the interior of the knee joint, and then drilled up into femur 15, stopping within the interior of femur 15 (Fig. 23).
Then cannulated femoral drill 600 is withdrawn back down the guidewire, leaving a femoral tunnel 25 (Fig.
24 ) .
Next, a graft ligament 35 is mounted to graft ligament support block 100 by threading one end of the graft ligament through graft hole 110, and then graft ligament support block 100 is mounted to the distal end of shaft 215, i.e., by seating fingers 220 in recesses 140. The two free ends of graft ligament 35 are preferably held taut, e.g., by passing sutures 70 through the two free ends of graft ligament 35 and then securing those sutures (e.g., by winding) to suture posts 227. This arrangement will help ccntrol the two free ends of craft ligament ---5 and will help hold graft ligament support block 100 to holder 205. Then installation tool 200 is used to push graft ligament support block 100, and hence graft ligament 35, up through tibial tunnel 20 (Fig. 25), across the interior of the knee joint, and up into femoral tunnel 25 (Fig. 26).
If desired, all of the force required to advance graft ligament support block 100 and graft ligament 35 through tibial tunnel 20, across the interior of the knee joint, and up into femoral tunnel 25 may be supplied by pushing distally on installation tool 200.
Alternatively, if guidewire 400 has been drilled completely through femur 15 (e.g., such as is shown in Fig. 22), and if the proximal end of guidewire 400 includes a suture eyelet (e.g., such as the suture eyelet 405 shown in Figs. 23 and 24), a suture may be used to help tow graft ligament support block 100 and graft ligament 35 up into position. More particularly, a suture 700 (Fig. 25) may be looped through the suture hole 145 in graft ligament support block 100 and through suture eyelet 405 on guidewire 400; then, by pulling distally on the portion of guidewire 400 extending out of the top end of femur 15, suture 700 can be used to help tow graft ligament support block 100 and graft ligament 35 up into position (Fig. 26).
Such an arrangement will help reduce the amount of force which needs to be delivered by installation tool 200 to push graft ligament support block 100 and graft ligament 35 up into position.
Once graft ligament support block 100 and graft ligament 35 have been advanced into position (Fig. 26), drill sleeve 270 is advanced into tight engagement with femur 15 (Fig. 27). This action will help stabilize installation tool 200 relative to femur 15. Then a transverse tunnel drill 800 (Fig. 28) is used to drill a transverse tunnel 75 through the lateral portion of femur 15, through transverse fixation pin hole 115 in graft ligament support block 100, and into the medial portion of femur 15. In this respect it will be appreciated that transverse tunnel drill 800 will be accurately and consistently directed through transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 28) due to the fact that the orientation of graft ligament support block 100 and installation tool 200 (and hence drill sleeve 270) is regulated by the engagement of fingers 220 in recesses 140.
Once transverse tu::-nel drill 800 has been used to drill transverse tunnel 75, transverse tunnel drill 800 is removed (Fig. 29). Then drill sleeve 270 is loosened and outrigger 210 dismounted from holder 205 (Fig. 30). Then transverse fixation pin 300, mounted on a driver 325, is advanced into transverse tunnel 75 and across transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 31), whereby to secure graft ligament support block 100 (and hence graft ligament 35) in femoral tunnel 25. Depending on whether section 315 of transverse fixation pin 300 is ribbed or barbed or threaded, the transverse fixation pin may be advanced by driver 325 by tapping on the proximal end of the driver with a mallet or by rotating the driver and/or both. The driver 325 is then removed (Fig. 32). Next, the two free ends of graft ligament 35 are detached from the handle's suture posts 227, and holder 205 is withdrawn (Fig. 33) . In thi s respect it will be appreciated that graft ligament support block 100 will be held in position in femoral tunnel 25 when holder 205 is withdrawn due to the presence of transverse fixation pin 300 in transverse tunnel 75 and transverse fixation pin hole 115. Finally, the two free ends of graft ligament 35 are secured to tibia 10, thereby completing the ACL reconstruction procedure.
In the embodiment disclosed above, transverse fixation pin hole 115 (Fig. 8) is pre-formed in body 105. Such a construction is generally advantageous, since it eliminates the need to drill through body 105 after graft ligament support block 100 has been positioned in the femoral tunnel and before transverse fixation pin 300 has been passed through body 105. In addition, by pre-forming transverse fixation ain hole 115 in body 105, transverse fixation pin hole 115 can be given a desired geometry, e.g., it permits the entrance to crosspin hole 115 to be tapered, such as is shown at 155 in Fig. 8, whereby to help center transverse fixation pin 300 in transverse fixation pin hole 115. However, it should also be appreciated that, if desired, transverse fixation pin hole 115 may not be pre-formed in body 105. Instead, transverse fixation pin hole 115 may be formed in situ, at the time of surgery, e.g., by drilling across body 105 when forming transverse tunnel 75 with transverse tunnel drill 800.
Where transverse fixation pin hole 115 is to be formed in situ, it is of course nece=sary for body 105 to be formed out of a drillable material. In addition, where transverse fixation pin hole 1-15 is to be formed in situ, it is preferred that body 105 be formed out of a relatively strong material, since then any misplacement (i.e., any off-center placement) of transverse fixation pin hole 115 will be well tolerated by body 105.
Additionally, in the embodiment disclosed above, the outer surface of body 105 is sculpted away proximal to graft hole 110, such as is shown at 135 in Fig. 8, so as to help accommodate the graft ligament in femoral tunnel 25. In Fig. 8, sculpting is effected so as to produce a substantially planar surface at 135.
However, if desired, sculpting can be effected so as to provide alternative geometries, e.g., a surface groove, etc. Thus, for example, in Fig. 34 body 105 is shown with a pair of surface grooves 165 communicating with, and extending proximally from, graft hole 110. Surface grooves 165 are sized so as to provide a recess for seating portions of the graft ligament as the graft ligament extends proximally from graft hole 110.
Also, in the embodiment disclosed above, body 105 is shown (see, for exG?r:ple, Fig. 8) as having a relatively smooth outer surface. However, if desired, body 105 may have spikes or ribs, etc. formed on a side wall thereof so as to help stabilize bodv 105 within the bone tunnel.
Furthermore, in the embodiment disclosed above, drill sleeve 270 is movably connected to outrigger 235 via a screw connection (i.e., screw threads 275 on the exterior of drill sleeve 270 and threaded bore 240 in outrigger 235). This arrangement provides a simple and cost-effective way to movably secure drill sleeve 270 to outrigger 235. However, if desired, other types of arrangements could also be used. For example, and looking now at Figs. 35 and 36, drill sleeve 270 could have a smooth or ribbed or roughed (e.g. knurled) exterior 275A that slides through a non-threaded bore 240A in outrigger 235, with a locking pin 235A being selectively advanceable (through a threaded bore 235B) into engagement with drill sleeve 270, whereby to selectively lock the drill sleeve to the outrigger.
Still other possible arrangements for selectively locking drill sleeve 270 to outrigger 235 will be apparent to those skilled in the art of drilling and drill sleeves.
Also, in the embodiment disclosed above, drill guide 210 is shown (see, for example, Fig. 14) as being releasably secured to holder 205 via a post 255 and tightening nut 290. However, it should be appreciated that other types of connections (e.g., a "quick release" clamping mechanism) may also be used to releasably secure drill guide 210 to holder 205.
It is also possible to form transverse tunnel 75 before graft ligament support block 100 and graft ligament 35 are positioned in femoral tunnel 25. More particularly, in one possible arrangement, a reamer drill guide 200A (Fig. 37) may be used. Reamer drill guide 200A is substantially identical to the installation tool 200 described above, except as will hereinafter be described. More particularly, reamer drill guide 200A comprises a reamer 205A and the drill guide 210. Reamer 205A is substantially identical to the holder 205 described above, except that it has a cylindrical element 220A (Figs. 37 and 30^) at its distal end having a transverse hole 220B extending therethrough, and it omits the suture posts 227 which are preferably provided on holder 205. Reamer 205A is configured so that (i) its cylindrical element 220A has a diameter approximately equal to the diameter of femoral tunnel 25, and (ii) when drill guide 210 is attached to reamer 205P_, the lumen 285 in drill sleeve 270 will be aligned with transverse hole 2203 in reamer 205A.
Graft ligament support block 100, holder 205 and reamer drill guide 200A may be used to effect an ACL
reconstruction as follows.
First, the surgical site is prepared for the graft ligament, e.g., by clearing away the damaged ACL, etc.
Then a guidewire 400 (Fig. 17) is drilled up through tibia 10, across the interior of the knee joint.
Preferably guidewire 400 is stopped short of engaging the bottom of femur 15 (Fig. 18). Then a cannulated tibial drill 500 (Fig. 19) is loaded onto guidewire 400 and drilled up through tibia 10 and into the interior of the knee joint (Fia. 20). Then cannulated tibial drill 500 is withdrawn b;-:.,ck down the guidewire (Fig.
21), leaving a tibial tunnel 20.
Next, guidewire 400 is drilled an appropriate distance into the interior of femur 15. Then a cannulated femoral drill 600 (e.g., an acorn drill of the type shown in Fig. 22) is loaded onto guidewire 400, passed through tibial tunnel 20, across the interior of the knee joint, and then drilled up into femur 15, stopping within the interior of femur 15.
Then cannulated femoral drill 600 is withdrawn back down the guidewire, leaving a femoral tunnel 25, and then guidewire 400 is withdrawn (see Fig. 39).
Next, reamer drill guide 200A is advanced so that its cylindrical element 220A is advanced through tibial tunnel 20, across the interior of the knee, and up into femoral tunnel 25. In this respect it should be appreciated that as reamer drill guide 200A is advanced through tibial tunnel 20 and femoral tunnel 25, its cylindrical element 220A will ream both bone tunnels, clearing out any intervening debris.
Once reamer drill guide 200A has been advanced into position, drill sleeve 270 is advanced into tight engagement with femur 15. This action will help stabilize reamer drill guide 200A relative to femur 15.
Then a transverse tunnel drill 800 (Fig. 40) is used to drill a transverse tunnel 75 through the lateral portion of femur 15, through transverse hole 220B in cylindrical element 220A, and into the medial portion of femur 15. In this respect it will be appreciated that transverse tunnel drill 800 will be accurately and consistently directed through transverse hole 220B in cylindrical element 220A (Fig. 40) due to the fact that the relative orientation of cylindrical element 220A
and drill sleeve 270 is regulated by the pre-defined engagement of drill guide 210 with reamer 205A.
Once transverse tunnel drill 800 has been used to drill transverse tunnel 75, transverse tunnel drill 800 is removed. Then drill sleeve 270 is loosened and reamer drill guide 200A is withdrawn from the surgical site (Fig. 41).
Next, a graft ligament 35 is mounted to graft ligament support block 100 by threading one end of the graft ligament through graft hole 110, and then graft ligament support block 100 is mounted to the distal end of shaft 215, i.e., by seating fingers 220 in recesses 140. The two free ends of graft ligament 35 are preferably held taut, e.g., by passing sutures 70 through the two free ends of graft ligament 35 and then securing these sutures (e.g., by winding) to suture posts 227. This arrangement will help control the two free ends of graft ligament 35 and will help hold graft ligament support bloc}: 100 to holder 205. Then holder 205 is used to push graft ligament supporr block 100, and hence graft ligament 35, ,,,p through tibial tunnel 20, across the interior of the knee joint, and up into femoral tunnel 25 (Fig. 42). As graft ligament support block is advanced in femoral tunnel 25, or after it has been advanced an appropriate distance into femoral tunnel 25, it is rotated as necessary, by turning handle 225 as necessary, so as to align the transverse fixation pin hole 115 with transverse tunnel 75. Such alignment may be facilitated by providing an alignment marker (e.g., such as the alignment marker 225A shown in Fig. 43) on handle 225.
Then transverse fixation pin 300, mounted on a driver 325, is advanced into transverse tunnel 75 and across transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 44), whereby to secure graft ligament support block 100 (and hence graft ligament 35) in femoral tunnel 25. Then driver 325 is removed. Next, the two free ends of graft ligament 35 are detached from the handle's suture posts 227, and holder 205 is withdrawn. In this respect it will be appreciated that graft ligament support block 100 will be held in position in femoral tunnel 25 when holder 205 is withdrawn due to the presence of transverse fixation pin 300 in transverse tunnel 75 and transverse fixation pin hole 115. Finally, the two free ends of graft ligament 35 then secured to tibia 10, thereby completing the ACL reconstruction procedure.
In the preceding discussion, the present invention has been discussed on the context of an ACL
reconstruction. However, it should also be appreciated that the present invention may also be used in connection with the other types of ligament reconstructions and/or other types of anatomical reconstructions.
There are currently a n u-_'-zr of diffeyent ways to secure a graft ligament in a -.cne tunnel. One way is to use an interference screw 40 (Fig. 4) to wedge the graft ligament against an opposing side wall of the bone tunnel. Another way is to suspend the graft ligament in the bone tunnel with a button 45 and a suture 50 (Fig. 5) or with a crosspin 55 (Fig. 6).
Still another way is to pass the graft ligament completely through the bone tunnel and affix the graft ligament to the outside of the bone with a screw 60 and washer 65 (Fig. 7) or with a staple (not shown).
The "Gold Standard" of ACL repair is generally considered to be the so-called "Bone-Tendon-Bone"
fixation. In this procedure, a graft of the patella tendon is used to replace the natural ACL. Attached to the opposing ends of the harvested tendon are bone grafts, one taken from the patient's knee cap (i.e., the patella) and one taken from the patient's tibia (i.e., at the location where the patella tendon normally attaches to the tibia). The graft ligament is then deployed in the bone tunnels, with one bone graft being secured in the femoral tunnel with an interference screw and the other bone graft being secured in the tibial tunnel with another interference screw. Over the years, this procedure has generally yielded a consistent, strong and reliable ligament repair. However, this nrocedure is also generally considered to be highly invasive and, in many cases, quite painful, and typically leaves unsightly scarring on the knee and a substantial void in the knee cap.
As a result, alternative procedures have recently been developed that incorporate the use of soft tissue grafts such as the hamstring tendon. However, soft tissue grafts such as the hamstring can be difficult to stabilize within a bone tunnel. More particularly, the use of an interference screw to aggressively wedge the hamstring against an opposing side wall of the bone tunnel can introduce issues such as graft slippage, tendon winding, tissue necrosis and tendon cutting.
Furthermore, the use of a suture sling (e.g., such as that shown in Fig. 5) and/or a crosspin (e.g., such as that shown in Fig. 6) to suspend the hamstring within the bone tunnel can introduce a different set of issues, e.g., it has been round that the suture sling and/or crosspin tend to permit the graft ligGment to move laterally within the bone tunnel, with a so-called "windshield wiper" effect, thereby impeding ingrowth between the graft ligament and the host bone and/or causing abrasion and/or other damage to the graft tissue. In addition, the use of a crosspin (e.g., such as that shown in Fig. 6) to secure a hamstring within the bone tunnel can introduce still other issues, e.g., difficulties in looping the hamstring over the crosspin, or tearing of the hamstring along its length during tensioning if and where the crosspin passes through the body of the hamstring, etc.
Summary Of The Invention As a result, one object of the present invention is to provide improved apparatus for reconstructing a ligament, wherein the acparatus is adapted to permit the graft liaament to be fash;oned out of various soft tissue grafts, e.g., alloarafts, autografts, xenografts, bioengineered tissue grafts or synthetic grafts, and further wherein the graft is intended to be secured in place using a transverse fixation pin.
Another object of tre present invention is to provide an improved met::od fcr reconstructing a ligament, wherein the -.ethcd is adapted to permit the graft ligament to be fashioned cut of various soft tissue grafts, e.g., allografts, autografts, xenografts, bioengineered tissue grafts or synthetic grafts, and further wherein the graft is intended to be secured in place using a transverse fixation pin.
These and other objects are addressed by the present invention which comprises, in one preferred form of the invention, the provision and use of a graft ligament support block which comprises a body, and a graft hole and a transverse fixation pin hole extending through the body, with both the graft hole and the transverse fixation pin hole preferably extending substantially perpendicular to the longitudinal axis of the body. In one preferred form of the invention, the invention also comprises an installation tool for inserting the graft ligament support block into the bone tunnel and, while supporting the graft ligament support block in the bone tunnel, forming a transverse tunnel in the host bone, with the transverse tunnel in the host bone being aligned with the transverse fixation pin hole in the graft ligament support block.
In one preferred method of use, a graft ligament is looped through the graft hole in the graft ligament support block, and the graft ligament support block is mounted to the installation tool. The two free ends of the graft ligament are then preferably secured to a proximal portion of the installation tool under tension, whereby to tie down the two free ends of the graft ligament. In addition to controlling the two free ends of the graft ligament, this arrangement will also help hold the graft ligament support block to the installation tool. Then the installation tool is used to advance the graft ligament support block through the tibial tunnel, across the interior of the knee joint, and up into the femoral tunnel, with the two free ends of the looped graft ligament extending back out through the tibial tunnel. Next, a transverse tunnel is formed in the host bone, with the transverse tunnel being aligned with the transverse fixation pin hole in the graft ligament support block. Then the graft ligament support block is secured in place by pinning the graft ligament support block within the femoral tunnel, i.e., by advancing a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament sunport block. Then the two free ends of the looped graft ligament are released from the installation tool, the installation tool is detached from the graft ligament support block, and the installation tool is withdrawn from the surgical site. Finally, the two free ends of the looped graft ligament are secured to the tibia, thus completing the ACL repair. If desired, the tibial attachment can be effected using a second graft ligament support block.
Brief Description Of the Drawings These and other objects and features of the present invention will be more fully disclosed or rendered obvious by the following detailed description of the preferred embodiments of the invention, which is to be considered together with the accompanying drawings wherein like numbers refer to like parts and further wherein:
Fig. 1 is a schematic view of a knee joint, as viewed from the anterior side;
Fig. 2 is a schematic view of a knee joint, as viewed from the posterior side;
Fig. 3 is a schematic view of a generic ACL
reconstruction;
Fig. 4 is a schematic view of an ACL
reconstruction effected using an interference screw;
Fig. 5 is a schematic view of an ACL
reconstruction effected using a suture sling;
Fig. 6 is a schematic view of an ACL
reconstruction effected using a crosspin;
Fig. 7 is a schematic view of an ACL
reconstruction effected using a screw and washer;
Fig. 8 is a schematic view of a graft ligament support block formed in accordance with the present invention;
Fig. 9 is a partially exploded view showing the graft ligament support block of Fig. 8 and an installation tool for deploying the same;
Figs. 10-12 are various views showing the graft ligament support block of Fig. 8 mounted to the distal end of the installation tool shown in Fig. 9;
Fig. 13 is a partial perspective view showing details of the proximal end of the installation tool shown in Fig. 9;
Fig. 14 is a side view, partially in section, showing further details of the construction of the installation tool shown in Fig. 9;
Fig. 15 is a side sectional view of the installation tool's drill sleeve;
Fig. 16 is a perspective view of a transverse fixation pin which may be used in conjunction with the graft ligament support block of Fig. 8 and the installation tool of Fig. 9;
Figs. 17-33 are a series of schematic views showing an ACL reconstruction being effected in accordance with the present invention;
Fig. 34 is a schematic view showing another form of graft ligament support block formed in accordance with the present invention;
Fig. 35 is an enlarged side view showing an alternative construction for a portion of the installation tool;
Fig. 36 is a sectional view taken along line 36-36 of Fig. 35;
Fig. 37 is a schematic view showing a reamer drill guide formed in accordance with the present invention;
Fig. 38 is a schematic view showing the reamer element of the reamer drill c;~ide shown in Fig. 37; and Figs. 39-44 are a series of schematic views showing an ACL reconstruction being effected in accordance with the present invention.
Detailed Descrintion Of the Preferred Embodiment Looking next at Fig. 8, there is shown a graft ligament support block 100 which comprises one preferred form of the invention. Graft ligament support block 100 comprises a body 105, and a graft hole 110 and a transverse fixation pin hole 115 extending through body 105, with both graft hole 110 and transverse fixation pin hole 115 preferably extending substantially perpendicular to the longitudinal axis 120 of body 105. In one preferred form of the invention, graft hole 110 and transverse fixation pin hole 115 extend diametrically across body 105, with graft hole 110 and transverse fixation pin hole 115 extending substantially parallel to one another. Preferably graft hole 110 resides closer to the proximal end 125 of body 105 than transverse fixation pin hole 115, and transverse fixation pin hole 115 resides closer to t*ne distal end 130 of body 105 than graft hole 110. In one p-referred form of the invention, the distal end of body 105 has a circular cross-section, although it may also have an oval cross-section or a polygonal cross-section (e.g., square or rectangular or triangular, etc.). In one preferred construction, the distal end of body 105 has a cross-section sized just slightly smaller than the diameter of the bone tunnel, so as to provide a close interface between body 105 and the walls of the bone tunnel. In one preferred form of the invention, the distal end 130 of body 105 is tapered so as to facilitate advancement of graft ligament support block 100 through a bone tunnel. And in a preferred form of the invention, the proximal end of body 105 is sculpted away, e.g. such as shown at 135, so as to provide more room for a graft ligament looped through graft hole 110 and extending distally therefrom. Body 105 also includes a pair of recesses 140 for mounting body 10S to an appropriate installation tool, as will hereinafter be discussed in further detail.
If desired, graft ligament support block 100 may also include suture hole 145 for receiving a tow suture, as will hereinafter be discussed in further detail.
Additionally, if desired, the proximal end of graft hole 110 may be tapered as shown at 150 so as to provide a.less traumatic bearing surface for a graft ligament looped through graft hole 110, and/or the entrance of transverse fixation pin hole 115 may be tapered as shown at 155 so as to facilitate entry of a transverse fixation pin into transverse fixation pin hole 115.
Body 105 may be formed out of a polymer, a bioabsorbable or bioremodelable material, allograft bone, a metal, a ceramic, coral, a fiber composite, a composite including at least one of the foregoing, etc.
By forming body 105 out of a relatively strong material, the graft ligament can be held under tension even where body 105 is relatively small, or where one or more of the holes 110, 115 and/or 145 is located fairly close to the periphery of body 105.
Looking next at Figs. 9-15, there is shown an installation tool 200 which may be used in conjunction with graft ligament support block 100. Installation tool 200 generally comprises a holder 205 and an associated drill guide 210.
Holder 205 comprises a shaft 215 having a pair of finger 220 at its distal end and a handle 225 at its proximal end. Fingers 220 allow installation tool 200 to mate with, and releasably hold, graft ligament support block 100 by selectively fitting into the recesses 140 (Fig. 8) formed on the proximal end of graft ligament support block 100. See Figs. 9-12 and 14. In essence, fingers 220 and recesses 140 comprise a male/female connection; if desired, the locations of the male and female members may be reversed (i.e., with the male portion on support block 100 and the female portion on holder 205); or an alternative type of connection (e.g., a grasper) may be used. Preferably one or more suture posts 227 are formed on the proximal end of shaft 215 adjacent to handle 225. Suture posts 227 allow the two free ends of a graft ligament to be secured to the installation tool, as will hereinafter be discussed in further detail. Handle 225 allows installation tool 200 to be conveniently grasped by a user. Handle 225 includes a post hole 230. Post hole 230 allows drill guide 210 to be releasably secured to holder 205, as will hereinafter be discussed in further detail.
Drill guide 210 ccmprises an outrigger 235 having a threaded bore 240 (Fig. 14) formed in its distal end 245, and a slot 250 (Fig. 9) and post 255 at its proximal end 260. The end of post 255 is threaded, e.g., as shown at 265.
The threaded bore 240 (Fig. 14) in the outrigger's distal end 245 is sized to receive a drill sleeve 270 therein. Drill sleeve 270 has threads 275 along its length and terminates in a proximal head 280. Head 280 can be used to manually rotate drill sleeve 270 within the outrigger's threaded bore 240, whereby to move drill sleeve 270 relative to the distal end 245 of outrigger 235. A lumen 285 extends through drill sleeve 270.
Slot 250 and post 255 permit outrigger 235 to be releasably mounted to holder 205. More particularly, outrigger 235 may be mounted to holder 205 by fitting the holder's shaft 215 in the outrigger's slot 250 (Figs. 13 and 14), fitting the outrigger's post 255 in the holder's post hole 230, and then tightening nut 290 onto the threaded end 265 of oost 255.
As will hereinafter be dz-nscribed, graft ligament support block 100 and installation tool 200 are intended to be used in conjunction with a transverse fixation pin. One preferred transverse fixation pin 300 is shown in Fig. 16. Transverse fixation pin 300 generally comprises a solid shaft 305 terminating in a tapered distal end 310, and a ribbed (or barbed or threaded) section 315. A non-circular socket 320 is formed in the proximal end of transverse fixation pin 300, whereby transverse fixation pin 300 may be engaged by a driver.
An ACL reconstruction effected in accordance with the present invention will now be described.
First, the surgical site is prepared for the graft ligament, e.g., by clearing away the damaged ACL, etc.
Then a guidewire 400 (Fig. 17) is drilled up through tibia 10 and into the interior of the knee joint.
Preferably guidewire 400 is stopped short of engaging the bottom of femur 15 (Fig. 18). Then a cannulated tibial drill 500 (Fig. 19) is loaded onto guidewire 400 and drilled up through tibia 10 and into the interior of the knee joint (Fig. 20). Then cannulated tibial drill 500 is withdrawn back down the guidewire (Fig. 21), leaving a tibial tunnel 20.
Next, guidewire 400 is drilled an appropriate distance into the interior of femur 15. If desired, guidewire 400 may be drilled all the way through femur (Fig. 22), for reasons which will hereinafter be described. Then a cannulated femoral drill 600 (e.g., an acorn drill) is loaded onto guidewire 400 (Fig. 22), 15 passed through tibial tunnel 20, across the interior of the knee joint, and then drilled up into femur 15, stopping within the interior of femur 15 (Fig. 23).
Then cannulated femoral drill 600 is withdrawn back down the guidewire, leaving a femoral tunnel 25 (Fig.
24 ) .
Next, a graft ligament 35 is mounted to graft ligament support block 100 by threading one end of the graft ligament through graft hole 110, and then graft ligament support block 100 is mounted to the distal end of shaft 215, i.e., by seating fingers 220 in recesses 140. The two free ends of graft ligament 35 are preferably held taut, e.g., by passing sutures 70 through the two free ends of graft ligament 35 and then securing those sutures (e.g., by winding) to suture posts 227. This arrangement will help ccntrol the two free ends of craft ligament ---5 and will help hold graft ligament support block 100 to holder 205. Then installation tool 200 is used to push graft ligament support block 100, and hence graft ligament 35, up through tibial tunnel 20 (Fig. 25), across the interior of the knee joint, and up into femoral tunnel 25 (Fig. 26).
If desired, all of the force required to advance graft ligament support block 100 and graft ligament 35 through tibial tunnel 20, across the interior of the knee joint, and up into femoral tunnel 25 may be supplied by pushing distally on installation tool 200.
Alternatively, if guidewire 400 has been drilled completely through femur 15 (e.g., such as is shown in Fig. 22), and if the proximal end of guidewire 400 includes a suture eyelet (e.g., such as the suture eyelet 405 shown in Figs. 23 and 24), a suture may be used to help tow graft ligament support block 100 and graft ligament 35 up into position. More particularly, a suture 700 (Fig. 25) may be looped through the suture hole 145 in graft ligament support block 100 and through suture eyelet 405 on guidewire 400; then, by pulling distally on the portion of guidewire 400 extending out of the top end of femur 15, suture 700 can be used to help tow graft ligament support block 100 and graft ligament 35 up into position (Fig. 26).
Such an arrangement will help reduce the amount of force which needs to be delivered by installation tool 200 to push graft ligament support block 100 and graft ligament 35 up into position.
Once graft ligament support block 100 and graft ligament 35 have been advanced into position (Fig. 26), drill sleeve 270 is advanced into tight engagement with femur 15 (Fig. 27). This action will help stabilize installation tool 200 relative to femur 15. Then a transverse tunnel drill 800 (Fig. 28) is used to drill a transverse tunnel 75 through the lateral portion of femur 15, through transverse fixation pin hole 115 in graft ligament support block 100, and into the medial portion of femur 15. In this respect it will be appreciated that transverse tunnel drill 800 will be accurately and consistently directed through transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 28) due to the fact that the orientation of graft ligament support block 100 and installation tool 200 (and hence drill sleeve 270) is regulated by the engagement of fingers 220 in recesses 140.
Once transverse tu::-nel drill 800 has been used to drill transverse tunnel 75, transverse tunnel drill 800 is removed (Fig. 29). Then drill sleeve 270 is loosened and outrigger 210 dismounted from holder 205 (Fig. 30). Then transverse fixation pin 300, mounted on a driver 325, is advanced into transverse tunnel 75 and across transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 31), whereby to secure graft ligament support block 100 (and hence graft ligament 35) in femoral tunnel 25. Depending on whether section 315 of transverse fixation pin 300 is ribbed or barbed or threaded, the transverse fixation pin may be advanced by driver 325 by tapping on the proximal end of the driver with a mallet or by rotating the driver and/or both. The driver 325 is then removed (Fig. 32). Next, the two free ends of graft ligament 35 are detached from the handle's suture posts 227, and holder 205 is withdrawn (Fig. 33) . In thi s respect it will be appreciated that graft ligament support block 100 will be held in position in femoral tunnel 25 when holder 205 is withdrawn due to the presence of transverse fixation pin 300 in transverse tunnel 75 and transverse fixation pin hole 115. Finally, the two free ends of graft ligament 35 are secured to tibia 10, thereby completing the ACL reconstruction procedure.
In the embodiment disclosed above, transverse fixation pin hole 115 (Fig. 8) is pre-formed in body 105. Such a construction is generally advantageous, since it eliminates the need to drill through body 105 after graft ligament support block 100 has been positioned in the femoral tunnel and before transverse fixation pin 300 has been passed through body 105. In addition, by pre-forming transverse fixation ain hole 115 in body 105, transverse fixation pin hole 115 can be given a desired geometry, e.g., it permits the entrance to crosspin hole 115 to be tapered, such as is shown at 155 in Fig. 8, whereby to help center transverse fixation pin 300 in transverse fixation pin hole 115. However, it should also be appreciated that, if desired, transverse fixation pin hole 115 may not be pre-formed in body 105. Instead, transverse fixation pin hole 115 may be formed in situ, at the time of surgery, e.g., by drilling across body 105 when forming transverse tunnel 75 with transverse tunnel drill 800.
Where transverse fixation pin hole 115 is to be formed in situ, it is of course nece=sary for body 105 to be formed out of a drillable material. In addition, where transverse fixation pin hole 1-15 is to be formed in situ, it is preferred that body 105 be formed out of a relatively strong material, since then any misplacement (i.e., any off-center placement) of transverse fixation pin hole 115 will be well tolerated by body 105.
Additionally, in the embodiment disclosed above, the outer surface of body 105 is sculpted away proximal to graft hole 110, such as is shown at 135 in Fig. 8, so as to help accommodate the graft ligament in femoral tunnel 25. In Fig. 8, sculpting is effected so as to produce a substantially planar surface at 135.
However, if desired, sculpting can be effected so as to provide alternative geometries, e.g., a surface groove, etc. Thus, for example, in Fig. 34 body 105 is shown with a pair of surface grooves 165 communicating with, and extending proximally from, graft hole 110. Surface grooves 165 are sized so as to provide a recess for seating portions of the graft ligament as the graft ligament extends proximally from graft hole 110.
Also, in the embodiment disclosed above, body 105 is shown (see, for exG?r:ple, Fig. 8) as having a relatively smooth outer surface. However, if desired, body 105 may have spikes or ribs, etc. formed on a side wall thereof so as to help stabilize bodv 105 within the bone tunnel.
Furthermore, in the embodiment disclosed above, drill sleeve 270 is movably connected to outrigger 235 via a screw connection (i.e., screw threads 275 on the exterior of drill sleeve 270 and threaded bore 240 in outrigger 235). This arrangement provides a simple and cost-effective way to movably secure drill sleeve 270 to outrigger 235. However, if desired, other types of arrangements could also be used. For example, and looking now at Figs. 35 and 36, drill sleeve 270 could have a smooth or ribbed or roughed (e.g. knurled) exterior 275A that slides through a non-threaded bore 240A in outrigger 235, with a locking pin 235A being selectively advanceable (through a threaded bore 235B) into engagement with drill sleeve 270, whereby to selectively lock the drill sleeve to the outrigger.
Still other possible arrangements for selectively locking drill sleeve 270 to outrigger 235 will be apparent to those skilled in the art of drilling and drill sleeves.
Also, in the embodiment disclosed above, drill guide 210 is shown (see, for example, Fig. 14) as being releasably secured to holder 205 via a post 255 and tightening nut 290. However, it should be appreciated that other types of connections (e.g., a "quick release" clamping mechanism) may also be used to releasably secure drill guide 210 to holder 205.
It is also possible to form transverse tunnel 75 before graft ligament support block 100 and graft ligament 35 are positioned in femoral tunnel 25. More particularly, in one possible arrangement, a reamer drill guide 200A (Fig. 37) may be used. Reamer drill guide 200A is substantially identical to the installation tool 200 described above, except as will hereinafter be described. More particularly, reamer drill guide 200A comprises a reamer 205A and the drill guide 210. Reamer 205A is substantially identical to the holder 205 described above, except that it has a cylindrical element 220A (Figs. 37 and 30^) at its distal end having a transverse hole 220B extending therethrough, and it omits the suture posts 227 which are preferably provided on holder 205. Reamer 205A is configured so that (i) its cylindrical element 220A has a diameter approximately equal to the diameter of femoral tunnel 25, and (ii) when drill guide 210 is attached to reamer 205P_, the lumen 285 in drill sleeve 270 will be aligned with transverse hole 2203 in reamer 205A.
Graft ligament support block 100, holder 205 and reamer drill guide 200A may be used to effect an ACL
reconstruction as follows.
First, the surgical site is prepared for the graft ligament, e.g., by clearing away the damaged ACL, etc.
Then a guidewire 400 (Fig. 17) is drilled up through tibia 10, across the interior of the knee joint.
Preferably guidewire 400 is stopped short of engaging the bottom of femur 15 (Fig. 18). Then a cannulated tibial drill 500 (Fig. 19) is loaded onto guidewire 400 and drilled up through tibia 10 and into the interior of the knee joint (Fia. 20). Then cannulated tibial drill 500 is withdrawn b;-:.,ck down the guidewire (Fig.
21), leaving a tibial tunnel 20.
Next, guidewire 400 is drilled an appropriate distance into the interior of femur 15. Then a cannulated femoral drill 600 (e.g., an acorn drill of the type shown in Fig. 22) is loaded onto guidewire 400, passed through tibial tunnel 20, across the interior of the knee joint, and then drilled up into femur 15, stopping within the interior of femur 15.
Then cannulated femoral drill 600 is withdrawn back down the guidewire, leaving a femoral tunnel 25, and then guidewire 400 is withdrawn (see Fig. 39).
Next, reamer drill guide 200A is advanced so that its cylindrical element 220A is advanced through tibial tunnel 20, across the interior of the knee, and up into femoral tunnel 25. In this respect it should be appreciated that as reamer drill guide 200A is advanced through tibial tunnel 20 and femoral tunnel 25, its cylindrical element 220A will ream both bone tunnels, clearing out any intervening debris.
Once reamer drill guide 200A has been advanced into position, drill sleeve 270 is advanced into tight engagement with femur 15. This action will help stabilize reamer drill guide 200A relative to femur 15.
Then a transverse tunnel drill 800 (Fig. 40) is used to drill a transverse tunnel 75 through the lateral portion of femur 15, through transverse hole 220B in cylindrical element 220A, and into the medial portion of femur 15. In this respect it will be appreciated that transverse tunnel drill 800 will be accurately and consistently directed through transverse hole 220B in cylindrical element 220A (Fig. 40) due to the fact that the relative orientation of cylindrical element 220A
and drill sleeve 270 is regulated by the pre-defined engagement of drill guide 210 with reamer 205A.
Once transverse tunnel drill 800 has been used to drill transverse tunnel 75, transverse tunnel drill 800 is removed. Then drill sleeve 270 is loosened and reamer drill guide 200A is withdrawn from the surgical site (Fig. 41).
Next, a graft ligament 35 is mounted to graft ligament support block 100 by threading one end of the graft ligament through graft hole 110, and then graft ligament support block 100 is mounted to the distal end of shaft 215, i.e., by seating fingers 220 in recesses 140. The two free ends of graft ligament 35 are preferably held taut, e.g., by passing sutures 70 through the two free ends of graft ligament 35 and then securing these sutures (e.g., by winding) to suture posts 227. This arrangement will help control the two free ends of graft ligament 35 and will help hold graft ligament support bloc}: 100 to holder 205. Then holder 205 is used to push graft ligament supporr block 100, and hence graft ligament 35, ,,,p through tibial tunnel 20, across the interior of the knee joint, and up into femoral tunnel 25 (Fig. 42). As graft ligament support block is advanced in femoral tunnel 25, or after it has been advanced an appropriate distance into femoral tunnel 25, it is rotated as necessary, by turning handle 225 as necessary, so as to align the transverse fixation pin hole 115 with transverse tunnel 75. Such alignment may be facilitated by providing an alignment marker (e.g., such as the alignment marker 225A shown in Fig. 43) on handle 225.
Then transverse fixation pin 300, mounted on a driver 325, is advanced into transverse tunnel 75 and across transverse fixation pin hole 115 in graft ligament support block 100 (Fig. 44), whereby to secure graft ligament support block 100 (and hence graft ligament 35) in femoral tunnel 25. Then driver 325 is removed. Next, the two free ends of graft ligament 35 are detached from the handle's suture posts 227, and holder 205 is withdrawn. In this respect it will be appreciated that graft ligament support block 100 will be held in position in femoral tunnel 25 when holder 205 is withdrawn due to the presence of transverse fixation pin 300 in transverse tunnel 75 and transverse fixation pin hole 115. Finally, the two free ends of graft ligament 35 then secured to tibia 10, thereby completing the ACL reconstruction procedure.
In the preceding discussion, the present invention has been discussed on the context of an ACL
reconstruction. However, it should also be appreciated that the present invention may also be used in connection with the other types of ligament reconstructions and/or other types of anatomical reconstructions.
Claims (36)
1. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bore tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between said distal end and said proximal end;
a graft hole extending through said body transverse to said longitudinal axis and configured to receive a graft ligament therein; and a transverse fixation pin hole extending through said body transverse to said longitudinal axis and configured to receive a transverse fixation pin therein.
a graft ligament support block for supporting a graft ligament in a bore tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between said distal end and said proximal end;
a graft hole extending through said body transverse to said longitudinal axis and configured to receive a graft ligament therein; and a transverse fixation pin hole extending through said body transverse to said longitudinal axis and configured to receive a transverse fixation pin therein.
2. Apparatus according to claim 1, wherein said graft hole resides closer to said proximal end of said body than said transverse fixation pin hole.
3. Apparatus according to claim 1, wherein at least a portion of an opening of said graft hole is tapered so as to provide a less traumatic bearing surface for a graft ligament looped through said graft hole.
4. Apparatus according to claim 1, wherein an opening of said transverse fixation pin hole is tapered so as to facilitate entry of a transverse fixation pin into said transverse fixation pin hole.
5. Apparatus according to claim 1, wherein at least a portion of said body between said graft hole and said transverse fixation pin hole has a substantially cylindrical cross-section.
6. Apparatus according to claim 1, wherein said distal end of said body is tapered so as to facilitate advancement of said graft ligament support block through a bone tunnel.
7. Apparatus according to claim 1, wherein said proximal end of said body is sculpted away so as to provide more room for a graft ligament looped through said graft hole and extending proximally therefrom.
8. Apparatus according to claim 7, wherein said proximal end of said body is sculpted away so as to form at least one substantially planar surface.
9. Apparatus according to claim 7, wherein said proximal end of said body is sculpted away so as to form at least one surface groove extending between said graft hole and said proximal end of said body.
10. Apparatus according to claim 1, wherein said body is formed out of a material selected from the group consisting of a polymer, a bioabsorbable material, a bioremodelable material, allograft bone, a metal, a ceramic, coral, a fiber composite, and a composite including at least one of the foregoing.
11. Apparatus according to claim 1, wherein said body further comprises at least one element for engagement by an installation tool.
12. Apparatus according to claim 11, wherein said at least one element comprises an opening formed in said proximal end of said body and adapted for engagement by a finger formed on the installation tool.
13. Apparatus according to claim 11, wherein said at least one element comprises a finger extending proximally from said proximal end of said body and adapted for engagement in an opening formed on the installation tool.
14. Apparatus according to claim 1, wherein said body further comprises a suture hole extending through said body transverse to said longitudinal axis and configured to receive a tow suture therein.
15. Apparatus according to claim 14, wherein said suture hole resides closer to said distal end of said body than said transverse fixation pin hole.
16. Apparatus according to claim 1, further comprising an installation tool, said installation tool comprising:
a holder, said holder comprising: a shaft having a distal end, a proximal end, and longitudinal axis extending between said distal end and said proximal end, said proximal end of said shaft comprising at least one finger for engagement in said opening; and a handle mounted to said proximal end of said shaft.
a holder, said holder comprising: a shaft having a distal end, a proximal end, and longitudinal axis extending between said distal end and said proximal end, said proximal end of said shaft comprising at least one finger for engagement in said opening; and a handle mounted to said proximal end of said shaft.
17. Apparatus according to claim 16, further comprising at least one suture post formed on said proximal end of said shaft.
18. Apparatus according to claim 16, wherein said installation tool further comprises a drill guide adapted to be releasably secured to said holder.
19. Apparatus according to claim 18, wherein said drill guide comprises:
an outrigger comprising a distal end and a proximal end, with said proximal end of said outrigger being configured to be releasably secured to said holder; and a drill sleeve moveably attached to said distal end of said outrigger, said drill sleeve comprising a drilling lumen extending therethrough.
an outrigger comprising a distal end and a proximal end, with said proximal end of said outrigger being configured to be releasably secured to said holder; and a drill sleeve moveably attached to said distal end of said outrigger, said drill sleeve comprising a drilling lumen extending therethrough.
20. Apparatus according to claim 19, wherein said installation tool is configured so that when said graft ligament support block is attached to said distal end of said shaft, said drilling lumen in said drill guide is aligned with said transverse fixation pin hole in said body.
21. Apparatus according to claim 16, wherein said proximal end of said holder comprises an orientation marker for visually indicating the axial orientation of said distal end of said shaft.
22. Use of a graft ligament support block to secure a graft ligament in a bone tunnel, wherein:
the graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel;
a transverse tunnel has been formed in the host bone, the transverse tunnel having been aligned with a transverse fixation pin hole in the graft ligament support block; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
the graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel;
a transverse tunnel has been formed in the host bone, the transverse tunnel having been aligned with a transverse fixation pin hole in the graft ligament support block; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
23. The use according to claim 22, wherein an installation tool has been used to advance the graft ligament support block into the bone tunnel.
24. The use according to claim 23, wherein the two free ends of the graft ligament have been secured to the installation tool prior to the graft ligament support block having been advanced into the bone tunnel.
25. The use according to claim 23, wherein the installation tool has been used to form the transverse tunnel in the host bone.
26. The use according to claim 22, wherein a tow suture has been used to advance the graft ligament support block into the bone tunnel.
27. Use of a graft ligament support block to secure a graft ligament in a bone tunnel, wherein:
a transverse tunnel has been formed in the host bone;
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel so that a transverse fixation pin hole in the graft ligament support block has been aligned with the transverse tunnel; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
a transverse tunnel has been formed in the host bone;
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel so that a transverse fixation pin hole in the graft ligament support block has been aligned with the transverse tunnel; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
28. The use according to claim 27, wherein an installation tool has been used to advance the graft ligament support block into the bone tunnel.
29. The use according to claim 28, wherein the two free ends of the graft ligament have been secured to the installation tool prior to having advanced the graft ligament support block into the bone tunnel.
30. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein; and said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein said body further defines a suture hole extending through said body transverse to the longitudinal axis and configured to receive a tow suture therein.
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein; and said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein said body further defines a suture hole extending through said body transverse to the longitudinal axis and configured to receive a tow suture therein.
31. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the entire edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and an installation tool, said installation tool comprising:
a holder, said holder comprising:
a shaft having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end, the distal end of said shaft comprising at least one finger for engagement in said opening; and a handle mounted to the proximal end of said shaft.
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the entire edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and an installation tool, said installation tool comprising:
a holder, said holder comprising:
a shaft having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end, the distal end of said shaft comprising at least one finger for engagement in said opening; and a handle mounted to the proximal end of said shaft.
32. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein the apparatus further comprises a transverse fixation pin for disposition in the transverse fixation pin hole.
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein the apparatus further comprises a transverse fixation pin for disposition in the transverse fixation pin hole.
33. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein a portion of said body through which the transverse fixation hole extends is provided with a substantially cylindrical configuration, and the transverse fixation hole is sufficiently large to provide curved recesses on either side of said body when viewed normal to an axis of the transverse fixation hole and normal to the longitudinal axis of said body, whereby to facilitate blind positioning of the transverse fixation pin therein.
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein;
said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to define an entrance adapted to receive a transverse fixation pin therein when said body is disposed in the bone tunnel, to lock said body in the bone tunnel;
wherein the entrance of the transverse fixation pin hole is tapered along the edge thereof to cause the transverse fixation pin to be funneled thereby into the transverse fixation pin hole; and wherein a portion of said body through which the transverse fixation hole extends is provided with a substantially cylindrical configuration, and the transverse fixation hole is sufficiently large to provide curved recesses on either side of said body when viewed normal to an axis of the transverse fixation hole and normal to the longitudinal axis of said body, whereby to facilitate blind positioning of the transverse fixation pin therein.
34. Apparatus for use in reconstructing a ligament, said apparatus comprising:
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein; and said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to receive a transverse fixation pin therein;
wherein a portion of said body through which the transverse fixation hole extends is provided with a substantially cylindrical configuration, and the transverse fixation hole is sufficiently large to provide curved recesses on either side of said body when viewed normal to an axis of the transverse fixation hole and normal to the longitudinal axis of said body, whereby to facilitate blind positioning of the transverse fixation pin therein.
a graft ligament support block for supporting a graft ligament in a bone tunnel, said graft ligament support block comprising:
a body having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end;
said body defining a graft hole extending therethrough transverse to the longitudinal axis and configured to receive a graft ligament therein; and said body defining a transverse fixation pin hole extending therethrough transverse to the longitudinal axis and configured to receive a transverse fixation pin therein;
wherein a portion of said body through which the transverse fixation hole extends is provided with a substantially cylindrical configuration, and the transverse fixation hole is sufficiently large to provide curved recesses on either side of said body when viewed normal to an axis of the transverse fixation hole and normal to the longitudinal axis of said body, whereby to facilitate blind positioning of the transverse fixation pin therein.
35. Use of a graft ligament support block to secure a graft ligament in a bone tunnel, wherein:
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel;
a transverse tunnel has been formed in the host bone, the transverse tunnel having been aligned with a transverse fixation pin hole in the graft ligament support block; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel;
a transverse tunnel has been formed in the host bone, the transverse tunnel having been aligned with a transverse fixation pin hole in the graft ligament support block; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
36. Use of a graft ligament support block to secure a graft ligament in a bone tunnel, wherein:
a transverse tunnel has been formed in the host bone;
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel so that a transverse fixation pin hole in the graft ligament support block has been aligned with the transverse tunnel; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
a transverse tunnel has been formed in the host bone;
a graft ligament has been looped through a graft hole in the graft ligament support block;
the graft ligament support block has been advanced into the bone tunnel so that a transverse fixation pin hole in the graft ligament support block has been aligned with the transverse tunnel; and the graft ligament support block has been pinned within the bone tunnel by having advanced a transverse fixation pin along the transverse tunnel in the host bone and into the transverse fixation pin hole in the graft ligament support block.
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US8292897B2 (en) | 2012-10-23 |
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