US20060282165A1 - Intervertebral disc implant - Google Patents
Intervertebral disc implant Download PDFInfo
- Publication number
- US20060282165A1 US20060282165A1 US11/440,552 US44055206A US2006282165A1 US 20060282165 A1 US20060282165 A1 US 20060282165A1 US 44055206 A US44055206 A US 44055206A US 2006282165 A1 US2006282165 A1 US 2006282165A1
- Authority
- US
- United States
- Prior art keywords
- frame
- cavity
- intervertebral disc
- arms
- implant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
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- A61F2210/0061—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof swellable
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0001—Means for transferring electromagnetic energy to implants
- A61F2250/0002—Means for transferring electromagnetic energy to implants for data transfer
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
- A61F2250/0012—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting elasticity, flexibility, spring rate or mechanical tension
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00161—Carbon; Graphite
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
- A61F2310/00407—Coating made of titanium or of Ti-based alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
Definitions
- the present invention relates to an intervertebral disc implant for stabilizing two adjacent vertebrae that maintains the functions of the normal, healthy disc. More specifically, the present invention relates to a rectangularly-shaped disc implant that is expanded in the middle portion that is used as an alternative to spinal fusion.
- intervertebral disc Treatment of the damaged intervertebral disc, especially in the cervical and/or lumbar region of the spine, continues to be a challenging field of medicine.
- the classic treatment for a ruptured disc is diskectomy, i.e., removal of the disc from between the vertebrae. In this process, all or a portion of the intervertebral disc is removed, leaving a defect that may bother the patient throughout the rest of their life and compromising the normal interaction between disc and adjacent vertebrae.
- a procedure that is sometimes used as an alternative to diskectomy is to remove some or all of the disc and then fill the disc space with a bone graft, usually bone chips cut from the patient's iliac crest, or bone plug, bringing about fusion of the vertebrae above and below the disc, eliminating the empty space between the vertebrae.
- a bone graft usually bone chips cut from the patient's iliac crest, or bone plug
- Diskectomy with fusion is not ideal because the replaced bone does not have the function of the cartilaginous tissue of the disc, i.e. no cushioning effect, and has complications because of several factors.
- conventional bone plugs used to pack the disc space do not conform to the space of the disc because the disc bulges maximally in the center while the bone plug is generally cylindrically shaped and the disc space is wider in the middle and narrower at its anterior and posterior ends. For this reason, many commercially available bone plugs have just four points at which they contact the bodies of the adjacent vertebrae, i.e. two points at each of the front and back of the disc space.
- the art also discloses intervertebral disc prostheses such as are shown in U.S. Pat. Nos. 3,867,728, 4,309,777, 4,863,477, 4,932,969, Applicant's own Pat. No. 5,123,926, and French Patent Application No. 8816184 that may have more general contact with the adjacent discs, and spinal joint prostheses as described in U.S. Pat. No. 4,759,769, but which are not intended for use in fusion of the discs.
- the utility of such devices is also limited by a number of disadvantages, in particular, the same lack of cushioning described above in connection with prior art disc plugs and implants.
- Another need that is apparent from the limitations and disadvantages of prior procedures, disc plugs, and prostheses is the need for a device that maintains the function of the healthy, intact intervertebral disc when implanted between adjacent vertebrae, is capable of being implanted in a surgical procedure that is minimally invasive, and that does not require removal of the entire intervertebral disc, and it is therefore also an object of the present invention to provide apparatus and methods for meeting that need.
- Another need that is apparent from the limitations and disadvantages of prior procedures, disc plugs, and prostheses is the need for a device that works with the structure of the intervertebral disc space to maintain as much of the normal function of the disc as possible, and it is also an object of the present invention to provide apparatus and methods that combine the properties of cushioning (by utilizing the remaining portion of the disc), stability (by utilizing a monolithic, biconvex implant), shock absorption (by providing different cushioning characteristics in different portions of the disc space), and provide the opportunity to help reconstruct and/or prevent recurrent herniation of the remaining portion of the disc (by utilizing a hydrogel to fill gaps in the disc space and using known surgical repair techniques) thereby meeting that need.
- Another need that is apparent is the need for a device that is capable of supporting the load imposed upon it when implanted in the disc space while also providing the cushioning function of the natural intervertebral disc and it is also an object of the present invention to provide apparatus and methods for meeting that need.
- a frame for an intervertebral disc implant comprised of two spaced apart, substantially parallel arms, a bridge connecting the arms at one end, a “U”-shaped ear extending at approximately a right angle from the end of one of the arms opposite the bridge and having a hole formed therein for receiving a screw, and a “Y”-shaped ear extending at approximately a right angle from the end of one of the arms opposite the bridge having holes formed in both forks of the Y-shaped ear for receiving screws
- the frame being comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load object of the present invention is to provide a frame for meeting that need.
- an intervertebral disc implant comprising an elongate body comprised of a resilient material having a cavity extending longitudinally into the body, the height of the body being greater than the width of the body, and a frame received within the cavity in the body comprised of two spaced apart, substantially parallel arms and a bridge connecting the arms at one end, the frame being comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load, the frame extending only part way into the cavity of the body in which it is received.
- the present invention provides a method of mimicking the function of the intervertebral disc of the intact spinal column after removal of a portion or all of the intervertebral disc from between the two adjacent vertebrae comprising the steps of inserting a resilient body having a height greater than its width and a cavity formed therein with a key received in the cavity into the intervertebral disc space with the height of the body oriented substantially parallel to the longitudinal axis of the spinal column, removing the key from the cavity in the body after the body is inserted into the intervertebral disc space, and inserting a frame part way into the cavity in the body, the frame comprising first and second arms arms connected by a bridge at one end for providing resistance to flexion and/or extension of the spinal column, and filling the portion of the cavity in the body into which the frame does not extend with a hydrogel.
- FIG. 1 shows a side elevational view of a presently preferred embodiment of an intervertebral disc implant constructed in accordance with the teachings of the present invention showing the key assembled to the implant for implantation in the intervertebral disc space.
- FIG. 2 is an end view of the intervertebral disc implant of FIG. 1 .
- FIG. 3 is a perspective view of the intervertebral disc implant of FIG. 1 after removal of the key from the cavity in the body of the implant and insertion of the frame into the cavity.
- FIG. 4 is a side elevational view of the invertebral disc implant of FIG. 3 .
- FIG. 5 is an end view of the intervertebral disc implant of FIG. 3 .
- FIG. 1 shows a presently preferred embodiment of an intervertebral disc implant constructed in accordance with the teachings of the present invention at reference numeral 10 .
- Disc implant 10 is comprised of three components, each described in more detail below, implant body 12 , key 14 , and frame 16 .
- Body 12 is preferably molded from a resilient, polymeric material. Although not limited to these materials, in the preferred embodiment, body 12 is molded from a biocompatible, viscoelastic polymer such as silicone, a urethane such as a polycarbonate urethane, or a polyurethane. As shown in FIGS.
- the body 12 is molded with a profile that approximates the shape of the normal intervertebral disc space with a height H greater than the width W (see FIG. 2 ); the top and bottom surfaces 36 of body 12 are arched so that the height of body 12 is greater in the center than at its ends.
- This shape of body 12 is referred to as being biconvex, e.g., both the top and bottom surfaces 36 of body 12 are convex in the anterior-posterior direction.
- intervertebral disc implant 10 vertebrae in the lumbar region of the spine
- the intervertebral disc implant of the present invention can also be utilized to advantage for replacement of a portion of a disc located in other portions of the spine.
- top and bottom surfaces 36 of body 12 are convex in the anterior-posterior and side-to-side directions, but they are also provided with an integral metal strip 20 that may be textured or provided with a grooved surface to facilitate the ingrowth of bone onto the surfaces 36 .
- the metal strips 20 are provided with structure for resisting anterior-posterior movement of body 12 once inserted into the disc space in the form of prongs 22 for biting into the cortical bone on the bearing surface of the adjacent vertebrae (not shown).
- the metal strips 20 affixed to the surfaces 36 of body 12 are covered with a porous or roughened titanium coating and perhaps even a layer of calcium phosphate for this purpose; other suitable coatings/surfaces are known in the art and include titanium wire mesh, plasma-sprayed titanium, porous cobalt-chromium and bioactive materials such as hydroxyapatite and the aforementioned calcium phosphate.
- This component of the artificial disc 10 of the present invention functions in a manner similar to the function of the cartilage of the normal, healthy disc to facilitate ingrowth of bone on the surfaces 36 .
- the implant body 12 is provided with an elongate cavity 18 for receiving a key 14 therein.
- the cavity 18 is formed with a portion near the opening into body 12 that is rectangularly-shaped (when viewed in cross-section) with dimensions that approximate the rectangular shape of key 14 and an enlarged portion deeper into body 12 , both for a purpose described below.
- the key 14 is comprised of a relatively incompressible material such as stainless steel, titanium, or a polymer such as nylon or polycarbonate (or any other relatively imcompressible biocompatible material) to maintain the shape of the body 12 when inserted into the intervertebral disc space after removal of a portion of the intervertebral disc.
- the intervertebral implant 10 of the present invention is optimally placed in the space from which a portion of the intervertebral disc has been removed at the centerline of the spinal column.
- Frame 16 is shown in FIGS. 3, 4 , and 5 , and by reference to those figures, it can be seen that frame 16 is comprised of two spaced apart arms 24 connected at one end by a bridge 26 . One or both of the ends 25 of the arms 24 opposite bridge 26 are provided with ears 28 having one or more holes 30 formed therein for receiving one or more screws (not shown) for securing frame 16 to the bodies of the vertebrae (not shown) adjacent the intervertebral disc space into which disc implant 10 is inserted.
- both ends of arms 24 are provided with ears 28 , the ear 28 A on the end of one arm 24 A being shaped in the form of a Y” and having two holes 30 formed therein, the portion of ear 28 A between the holes 30 being cutout at 32 to form the arms of the “U”-shaped ear 28 A, and the ear 28 B on the end of the other arm 24 B being shaped in the form of an inverted “U” and having a single hole 30 therein.
- This arrangement of “Y” and inverted “U”-shaped ears 28 A and 28 B allows the use of the disc implant 10 of the present invention in the intervertebral disc spaces of successive segments of the spinal column.
- the inverted “U”-shaped ear 28 B of one artificial disc extends into the cutout portion 32 of the “Y”-shaped ear 28 A secured to the body of that same vertebra.
- frame 16 when inserted into the cavity 18 in body 12 after the key 14 has been removed therefrom, frame 16 does not extend all the way into cavity 18 .
- the bridge 26 of frame 16 is positioned only about half way into the cavity 18 in disc implant 12 .
- cavity 18 is formed of a portion near the opening into the cavity with a shape that approximates the rectangular cross-sectional shape of key 14 , and as best shown in FIG. 4 , frame 16 resides in that portion of the cavity near the opening into cavity 18 .
- the dimensions of the portion of frame 16 that includes the arms 24 and bridge 26 are preferably approximately the same as the internal dimensions of this portion of cavity 18 (and coincidentally, the rectangular cross-sectional shape of key 14 ), although in one preferred embodiment, the dimensions of the portion of cavity 18 near the opening into cavity 18 is slightly smaller than the dimensions of the portion of frame 16 that includes the arms 24 and bridge 26 so as to help retain the frame 16 therein. In otherwords, it may be advantageous for the relative dimensions of the frame 16 and the opening into cavity 18 to be sized so that the frame 16 slightly stretches or expands the resilient material comprising implant body 12 when frame 16 is inserted into cavity 18 .
- the arms 24 of frame 16 may be angled slightly outwardly, or apart from each other, so that once the frame 16 is inserted into the cavity 18 in body 12 , the resilience of the material comprising body 12 , which may be stretched or expanded by insertion of the frame 16 , tends to retain frame 16 in the opening into cavity 18 .
- This slight angle of the arms 24 of frame 16 which is preferably less than about 5% from parallel, is exaggerated in the figures for purposes of illustration; in actual practice, the angle is small enough that it is appropriate to refer to the arms 24 as being substantially parallel to each other.
- frame 16 is comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load.
- Materials that are characterized by this spring-like function when formed into the frame 16 include, but are not limited to stainless steel, titanium and titanium alloys, cobalt-chrome (Co—Cr) alloys, cobalt-chromium-molybdenum (Co—Cr—Mo), and medical grade (inert) polymeric plastics such as polyethylene, all as known in the art.
- body 12 when the implant body 12 is inserted into the intervertebral disc space and key 14 is removed and replaced by frame 16 , body 12 is subjected to both compression and tension loads as the spine flexes and extends and as the patient moves during his/her normal daily routine. When subjected to these compression and tension loads, frame 16 deforms.
- the ends 25 of the arms 24 opposite bridge 26 tend to move closer to each other and when in tension, the ends 25 of the arms 24 opposite bridge 26 tend to move further apart; in other words, the arms 24 of frame 16 deviate from their original spaced apart position (in the preferred embodiment shown, the two arms are substantially parallel, but those skilled in the art who have the benefit of this disclosure will recognize that the invention is not limited to a frame having parallel arms) when under compression or tension force.
- the frame 16 tends to return to its original shape, i.e., the ends 25 of arms 24 opposite bridge 26 return to their original spaced relationship, and the arms therefore assume their original, spaced apart relationship.
- frame 16 acts as both a “backbone” and as a spring to help both bear compression loads and relieve tension loads in a manner that mimics normal disc function.
- the bridge 26 of frame 16 is positioned posteriorally relative to the ends 25 of arms 24 opposite bridge 26 .
- the spring function of frame 16 is advantageous because, as the patient bends forward, the ends of arms 24 opposite bridge 26 are subjected to compression loads, and the further the patient bends, the more the material comprising frame 16 tends to resist the compression load, providing the spring function discussed above.
- the bridge 26 of frame 16 is provided with a projection 34 that extends between the arms 24 that functions to limit the bending of the arms 24 , thereby limiting the flexure of the spinal column at the vertebrae adjacent the implant body 12 .
- the axis of rotation (the weight-bearing center of the intervertebral disc) translates anteriorally and posteriorally as the spine flexes and extends, and the variable resistance provided by this configuration and placement of frame 16 in the intervertebral disc space helps provide this normal front-to-back shift in the axis of rotation so that the disc implant of the present invention replicates that shifting in the axis of rotation.
- implant body 12 is provided with a cavity 18 and after positioning the implant body 12 in the space from which a portion of the intervertebral disc has been removed and removing the key 14 from cavity 18 , the frame 16 is inserted into the cavity in place of the key. As is best shown in FIG.
- frame 16 does not extend all of the way into the elongate cavity 18 , leaving a space that in the preferred embodiment is at least partially filled with a hydrogel such as a polyvinyl alcohol (PVA), synthetic silk-elastin copolymers, polymethyl- or polyethylmethacrylate, polyethylene or polyacrylonitrile that absorbs water and increases in volume upon absorption of water, thereby functioning to maintain disc height in a manner similar to the manner in which the healthy disc maintains proper spacing between adjacent vertebrae.
- PVA polyvinyl alcohol
- the central projection 34 of the bridge 26 of body 12 is provided with a port 38 through which hydrogel is added (or removed) from the portion of the cavity 18 that is not occupied by frame 16 .
- Port 38 is comprised of a channel that extends through the central projection 34 into the cavity 18 and the surgeon injects the hydrogel (or uses a syringe to remove hydrogel) as needed to confer the desired amount of initial disc height to the implanted body 12 .
- the port 38 is capped or plugged to prevent extrusion of the hydrogel contained within cavity 18 .
- a one-way valve of a type known in the art may be utilized for this purpose.
- the cavity 18 is provided with a portion having expanded dimensions (as compared to the dimensions of the portion of cavity 18 proximate the opening into the cavity) for the purpose of allowing the injection of increased amounts of hydrogel for extra adjustability in obtaining the desired disc height.
- Some or all of the prongs 22 used to resist anterior-posterior movement of the implant body 12 in the disc space are provided with channels 40 communicating with cavity 18 for the purpose of allowing ingress and egress of fluid into and out of the hydrogel contained in cavity 18 .
- frame 16 only part way into the cavity 18 in body 12 serves an additional purpose.
- the spring function of frame 16 provides resistance to compression and tension loads, but it also functions to allow anterior-posterior translation of the axis of rotation as the spine flexes so as to mimic the kinematics of the healthy disc.
- the portion of the material comprising body 12 that is positioned between the arms 24 of frame 16 and the bearing surfaces of the vertebral bodies of the adjacent vertebrae provides additional cushioning and resistance to the deformation of the frame 16 under extraordinary compression load.
- the body 12 having the frame 16 positioned therein provides different amounts of resistance to compression load as the patient bends.
- the resistance to compression provided by the location of frame 16 part way into cavity 18 is greater as spinal flexion increases compared to the resistance to compression provided by the portion of implant body 12 in which the resistance to compression is provided by the material comprising body 12 and the hydrogel located in the portion of cavity 18 into which frame 16 does not extend.
- the surgeon has the opportunity to fine-tune the amount of resistance as the spine flexes and/or extends by utilizing a frame with arms 24 of greater or shorter length so as to provide less or more resistance to flexure, respectively, and by adding or removing hydrogel in the portion of the cavity 18 into which frame 16 does not extend.
- the healthy intervertebral disc includes three parts, the nucleus pulposus, annulus fibrosus, and cartilagenous endplate, each with separate functions, and all of which cooperate to provide motion, load bearing characteristics, and the other functions of the intact spinal column.
- the intervertebral disc implant 10 of the present invention provides corresponding parts, with their corresponding contribution to function, in the form of the implant body 12 , which functions in a manner similar to the annulus fibrosus to maintain disc height, the frame-filled and hydrogel-filled cavity 18 which functions in a manner similar to the nucleus pulposus to distribute load and resist compression and tension, and the roughened surface of the metal strips 20 on surfaces 36 , which functions in a manner similar to the cartilagenous endplate by providing a surface that facilitates ingrowth of the bone, thereby making the intervertebral implant of the present invention an integral part of the spinal column.
- the surfaces of the metal strips 20 may be provided with prongs 22 or other structure for engaging the adjacent vertebrae to resist anterior-posterior movement of the implant 10 in the intervertebral disc space, but ingrowth of bone, facilitated by the roughened surface and/or surface coating on strips 20 , is particularly advantageous in retaining the implant 10 in the disc space.
Abstract
An intervertebral disc implant having a body with a greater height than width comprised of a resilient material and an elongate cavity for receiving a key to maintain the spacing between the vertebrae adjacent an intervertebral disc when implanted into the space from which a portion of the disc is removed. To distribute and cushion against compression loads, and to mimic the normal kinematics of the intact, healthy intervertebral disc, the key is removed after the body is implanted into the disc space and a frame that both provides resistance to compression and tension loads and translates the axis of rotation of the spinal column anteriorally and posteriorally as the patient bends and rotates is inserted into the cavity in the implant body. The frame does not extend all the way into the cavity in the body and the portion of the cavity into which the frame does not extend is filled with a hydrogel.
Description
- This application in a continuation-in-part of co-pending applications Ser. No. 11/246,961, filed Oct. 7, 2005, entitled TOTAL ARTIFICIAL INTERVERTEBRAL DISC, Ser. No. 11/195,890, filed Aug. 2, 2005, entitled TOTAL ARTIFICIAL DISC, International Application No. PCT/US2005/009323, filed Mar. 19, 2005, entitled ROTATING, LOCKING, SPRING-LOADED ARTIFICIAL DISK, and Ser. No. 10/804,895, filed Mar. 19, 2004, entitled ROTATING, LOCKING, SPRING-LOADED ARTIFICIAL DISK.
- The present invention relates to an intervertebral disc implant for stabilizing two adjacent vertebrae that maintains the functions of the normal, healthy disc. More specifically, the present invention relates to a rectangularly-shaped disc implant that is expanded in the middle portion that is used as an alternative to spinal fusion.
- Treatment of the damaged intervertebral disc, especially in the cervical and/or lumbar region of the spine, continues to be a challenging field of medicine. The classic treatment for a ruptured disc is diskectomy, i.e., removal of the disc from between the vertebrae. In this process, all or a portion of the intervertebral disc is removed, leaving a defect that may bother the patient throughout the rest of their life and compromising the normal interaction between disc and adjacent vertebrae. A procedure that is sometimes used as an alternative to diskectomy is to remove some or all of the disc and then fill the disc space with a bone graft, usually bone chips cut from the patient's iliac crest, or bone plug, bringing about fusion of the vertebrae above and below the disc, eliminating the empty space between the vertebrae.
- Diskectomy with fusion is not ideal because the replaced bone does not have the function of the cartilaginous tissue of the disc, i.e. no cushioning effect, and has complications because of several factors. First, conventional bone plugs used to pack the disc space do not conform to the space of the disc because the disc bulges maximally in the center while the bone plug is generally cylindrically shaped and the disc space is wider in the middle and narrower at its anterior and posterior ends. For this reason, many commercially available bone plugs have just four points at which they contact the bodies of the adjacent vertebrae, i.e. two points at each of the front and back of the disc space. Second, access to the disc is from the side of the dorsal spine of the adjacent vertebrae, leaving a space that is “off-center” relative to the bodies of the adjacent vertebrae such that the stability of the implant is even more problematical than might be apparent from the limited contact resulting from the shape of the intervertebral space. Another complication is the possibility of infection or other conditions that may require removal of the implant. Also, if the bone pieces do not fuse, they may eventually extrude out of the disc space, pressuring the nerve roots. The most significant disadvantages of fusion, however, is that it eliminates all motion at the joint between the two vertebrae as well as the shock-absorbing/cushioning function of the disc.
- Various prosthetic disc plugs, or implants, are disclosed in the art, but all are characterized by limitations of not conforming to the shape of the disc space, lack of stability when inserted off-center, inability to be removed, or other disadvantages. For instance, U.S. Pat. No. 4,863,476 (and its European counterpart, EP-A-0260044) describes an elongate, generally cylindrically-shaped body divided longitudinally into two portions having a cam device between the two portions for increasing the space between the two body portions once inserted into the disc space. However, because that device is cylindrical in shape such that the only contact points between the device and the vertebral bodies are at the front and back of the disc space, creating increased likelihood of instability, that device is generally unsuitable for use after partial diskectomy.
- The art also discloses intervertebral disc prostheses such as are shown in U.S. Pat. Nos. 3,867,728, 4,309,777, 4,863,477, 4,932,969, Applicant's own Pat. No. 5,123,926, and French Patent Application No. 8816184 that may have more general contact with the adjacent discs, and spinal joint prostheses as described in U.S. Pat. No. 4,759,769, but which are not intended for use in fusion of the discs. The utility of such devices is also limited by a number of disadvantages, in particular, the same lack of cushioning described above in connection with prior art disc plugs and implants. Further, those implants and prostheses that attempt to address this cushioning problem have generally failed because they are not capable of supporting the load imposed upon them by the active post-surgical patient. Further, many prior implants and prostheses require removal of the disc. Removing the disc is not totally undesirable because removing the intervertebral disc does help prevent problems from recurrent disc herniation through the opening into the intervertebral disc space. However, as with all surgical procedures, it is desirable to utilize as much existing structure as possible and to minimize invasiveness. One reason it is desirable to retain as much of the original disc as possible is that if an implant subsequently fails, or if further surgical intervention is indicated for reasons such as infection, the only alternative that is generally available after removal of the intervertebral disc is fusion.
- There is, therefore, a need for a device capable of stabilizing the vertebrae adjacent an intervertebral disc that overcomes the various disadvantages and limitations of known spinal fusion procedures and the disc plugs and implants that are used in such procedures, and it is an object of the present invention to provide apparatus and methods for meeting that need.
- There is also a need for a device that can be implanted into the disc space in a procedure that decreases the likelihood of recurrent disc herniation and it is also an object of the present invention to provide apparatus and methods for meeting that need.
- There is also a need for a device that mimics the function of the disc, in part by retaining as much of the undamaged disc as possible, that cooperates with the remaining portion of the disc to function in a manner similar to the normal, intact disc to provide the cushioning effect of the disc, and it is an object of the present invention to provide apparatus and methods for meeting that need.
- There is also a need for a device that not only functions to provide the cushioning effect of the intervertebral disc but that also provides the opportunity for repairing the remaining portion of the disc, and it is an object of the present invention to provide apparatus and methods for meeting that need.
- Another need that is apparent from the limitations and disadvantages of prior procedures, disc plugs, and prostheses is the need for a device that maintains the function of the healthy, intact intervertebral disc when implanted between adjacent vertebrae, is capable of being implanted in a surgical procedure that is minimally invasive, and that does not require removal of the entire intervertebral disc, and it is therefore also an object of the present invention to provide apparatus and methods for meeting that need.
- Another need that is apparent from the limitations and disadvantages of prior procedures, disc plugs, and prostheses is the need for a device that works with the structure of the intervertebral disc space to maintain as much of the normal function of the disc as possible, and it is also an object of the present invention to provide apparatus and methods that combine the properties of cushioning (by utilizing the remaining portion of the disc), stability (by utilizing a monolithic, biconvex implant), shock absorption (by providing different cushioning characteristics in different portions of the disc space), and provide the opportunity to help reconstruct and/or prevent recurrent herniation of the remaining portion of the disc (by utilizing a hydrogel to fill gaps in the disc space and using known surgical repair techniques) thereby meeting that need.
- Another need that is apparent is the need for a device that is capable of supporting the load imposed upon it when implanted in the disc space while also providing the cushioning function of the natural intervertebral disc and it is also an object of the present invention to provide apparatus and methods for meeting that need.
- Another need that is apparent is a need for a frame for an intervertebral disc implant comprised of two spaced apart, substantially parallel arms, a bridge connecting the arms at one end, a “U”-shaped ear extending at approximately a right angle from the end of one of the arms opposite the bridge and having a hole formed therein for receiving a screw, and a “Y”-shaped ear extending at approximately a right angle from the end of one of the arms opposite the bridge having holes formed in both forks of the Y-shaped ear for receiving screws, the frame being comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load object of the present invention is to provide a frame for meeting that need.
- Other objects, and the many advantages of the present invention, will be made clear to those skilled in the art in the following detailed description of several preferred embodiments of the present invention and the drawings appended hereto. Those skilled in the art will recognize, however, that the embodiments of the invention described herein are only examples provided for the purpose of describing the making and using of the present invention and that they are not the only embodiments of artificial discs that are constructed in accordance with the teachings of the present invention.
- The present invention addresses the above-described problem by providing an intervertebral disc implant comprising an elongate body comprised of a resilient material having a cavity extending longitudinally into the body, the height of the body being greater than the width of the body, and a frame received within the cavity in the body comprised of two spaced apart, substantially parallel arms and a bridge connecting the arms at one end, the frame being comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load, the frame extending only part way into the cavity of the body in which it is received.
- In another aspect, the present invention provides a method of mimicking the function of the intervertebral disc of the intact spinal column after removal of a portion or all of the intervertebral disc from between the two adjacent vertebrae comprising the steps of inserting a resilient body having a height greater than its width and a cavity formed therein with a key received in the cavity into the intervertebral disc space with the height of the body oriented substantially parallel to the longitudinal axis of the spinal column, removing the key from the cavity in the body after the body is inserted into the intervertebral disc space, and inserting a frame part way into the cavity in the body, the frame comprising first and second arms arms connected by a bridge at one end for providing resistance to flexion and/or extension of the spinal column, and filling the portion of the cavity in the body into which the frame does not extend with a hydrogel.
- Referring now to the figures,
FIG. 1 shows a side elevational view of a presently preferred embodiment of an intervertebral disc implant constructed in accordance with the teachings of the present invention showing the key assembled to the implant for implantation in the intervertebral disc space. -
FIG. 2 is an end view of the intervertebral disc implant ofFIG. 1 . -
FIG. 3 is a perspective view of the intervertebral disc implant ofFIG. 1 after removal of the key from the cavity in the body of the implant and insertion of the frame into the cavity. -
FIG. 4 is a side elevational view of the invertebral disc implant ofFIG. 3 . -
FIG. 5 is an end view of the intervertebral disc implant ofFIG. 3 . - In more detail,
FIG. 1 shows a presently preferred embodiment of an intervertebral disc implant constructed in accordance with the teachings of the present invention atreference numeral 10.Disc implant 10 is comprised of three components, each described in more detail below,implant body 12,key 14, andframe 16.Body 12 is preferably molded from a resilient, polymeric material. Although not limited to these materials, in the preferred embodiment,body 12 is molded from a biocompatible, viscoelastic polymer such as silicone, a urethane such as a polycarbonate urethane, or a polyurethane. As shown inFIGS. 1, 2 , and 3, thebody 12 is molded with a profile that approximates the shape of the normal intervertebral disc space with a height H greater than the width W (seeFIG. 2 ); the top andbottom surfaces 36 ofbody 12 are arched so that the height ofbody 12 is greater in the center than at its ends. This shape ofbody 12 is referred to as being biconvex, e.g., both the top andbottom surfaces 36 ofbody 12 are convex in the anterior-posterior direction. Although shown in the figures as being configured for the use of theintervertebral disc implant 10 vertebrae in the lumbar region of the spine, those skilled in the art will recognize from this description that, with appropriate changes in size and configuration, the intervertebral disc implant of the present invention can also be utilized to advantage for replacement of a portion of a disc located in other portions of the spine. - Not only are the top and
bottom surfaces 36 ofbody 12 convex in the anterior-posterior and side-to-side directions, but they are also provided with anintegral metal strip 20 that may be textured or provided with a grooved surface to facilitate the ingrowth of bone onto thesurfaces 36. In the preferred embodiment shown, themetal strips 20 are provided with structure for resisting anterior-posterior movement ofbody 12 once inserted into the disc space in the form ofprongs 22 for biting into the cortical bone on the bearing surface of the adjacent vertebrae (not shown). In a second embodiment, themetal strips 20 affixed to thesurfaces 36 ofbody 12 are covered with a porous or roughened titanium coating and perhaps even a layer of calcium phosphate for this purpose; other suitable coatings/surfaces are known in the art and include titanium wire mesh, plasma-sprayed titanium, porous cobalt-chromium and bioactive materials such as hydroxyapatite and the aforementioned calcium phosphate. This component of theartificial disc 10 of the present invention functions in a manner similar to the function of the cartilage of the normal, healthy disc to facilitate ingrowth of bone on thesurfaces 36. - The
implant body 12 is provided with anelongate cavity 18 for receiving a key 14 therein. In the preferred embodiment shown, thecavity 18 is formed with a portion near the opening intobody 12 that is rectangularly-shaped (when viewed in cross-section) with dimensions that approximate the rectangular shape ofkey 14 and an enlarged portion deeper intobody 12, both for a purpose described below. Because thebody 12 is comprised of a resilient material that can be compressed, the key 14 is comprised of a relatively incompressible material such as stainless steel, titanium, or a polymer such as nylon or polycarbonate (or any other relatively imcompressible biocompatible material) to maintain the shape of thebody 12 when inserted into the intervertebral disc space after removal of a portion of the intervertebral disc. Although not limited to this use, theintervertebral implant 10 of the present invention is optimally placed in the space from which a portion of the intervertebral disc has been removed at the centerline of the spinal column. -
Frame 16 is shown inFIGS. 3, 4 , and 5, and by reference to those figures, it can be seen thatframe 16 is comprised of two spaced apart arms 24 connected at one end by a bridge 26. One or both of theends 25 of the arms 24 opposite bridge 26 are provided with ears 28 having one ormore holes 30 formed therein for receiving one or more screws (not shown) for securingframe 16 to the bodies of the vertebrae (not shown) adjacent the intervertebral disc space into whichdisc implant 10 is inserted. In the preferred embodiment shown, both ends of arms 24 are provided with ears 28, theear 28A on the end of one arm 24A being shaped in the form of a Y” and having twoholes 30 formed therein, the portion ofear 28A between theholes 30 being cutout at 32 to form the arms of the “U”-shapedear 28A, and theear 28B on the end of the other arm 24B being shaped in the form of an inverted “U” and having asingle hole 30 therein. This arrangement of “Y” and inverted “U”-shapedears disc implant 10 of the present invention in the intervertebral disc spaces of successive segments of the spinal column. When secured to the body of the adjacent vertebra, the inverted “U”-shapedear 28B of one artificial disc extends into thecutout portion 32 of the “Y”-shapedear 28A secured to the body of that same vertebra. - As best shown in
FIG. 4 , when inserted into thecavity 18 inbody 12 after the key 14 has been removed therefrom,frame 16 does not extend all the way intocavity 18. In other words, the bridge 26 offrame 16 is positioned only about half way into thecavity 18 indisc implant 12. As noted above,cavity 18 is formed of a portion near the opening into the cavity with a shape that approximates the rectangular cross-sectional shape ofkey 14, and as best shown inFIG. 4 ,frame 16 resides in that portion of the cavity near the opening intocavity 18. The dimensions of the portion offrame 16 that includes the arms 24 and bridge 26 are preferably approximately the same as the internal dimensions of this portion of cavity 18 (and coincidentally, the rectangular cross-sectional shape of key 14), although in one preferred embodiment, the dimensions of the portion ofcavity 18 near the opening intocavity 18 is slightly smaller than the dimensions of the portion offrame 16 that includes the arms 24 and bridge 26 so as to help retain theframe 16 therein. In otherwords, it may be advantageous for the relative dimensions of theframe 16 and the opening intocavity 18 to be sized so that theframe 16 slightly stretches or expands the resilient material comprisingimplant body 12 whenframe 16 is inserted intocavity 18. Similarly, the arms 24 offrame 16 may be angled slightly outwardly, or apart from each other, so that once theframe 16 is inserted into thecavity 18 inbody 12, the resilience of thematerial comprising body 12, which may be stretched or expanded by insertion of theframe 16, tends to retainframe 16 in the opening intocavity 18. This slight angle of the arms 24 offrame 16, which is preferably less than about 5% from parallel, is exaggerated in the figures for purposes of illustration; in actual practice, the angle is small enough that it is appropriate to refer to the arms 24 as being substantially parallel to each other. - In the preferred embodiment,
frame 16 is comprised of a material that tends to return to its original shape after the frame is subjected to either a compression or tension load. Materials that are characterized by this spring-like function when formed into theframe 16 include, but are not limited to stainless steel, titanium and titanium alloys, cobalt-chrome (Co—Cr) alloys, cobalt-chromium-molybdenum (Co—Cr—Mo), and medical grade (inert) polymeric plastics such as polyethylene, all as known in the art. In other words, when theimplant body 12 is inserted into the intervertebral disc space and key 14 is removed and replaced byframe 16,body 12 is subjected to both compression and tension loads as the spine flexes and extends and as the patient moves during his/her normal daily routine. When subjected to these compression and tension loads,frame 16 deforms. Under compression, the ends 25 of the arms 24 opposite bridge 26 tend to move closer to each other and when in tension, the ends 25 of the arms 24 opposite bridge 26 tend to move further apart; in other words, the arms 24 offrame 16 deviate from their original spaced apart position (in the preferred embodiment shown, the two arms are substantially parallel, but those skilled in the art who have the benefit of this disclosure will recognize that the invention is not limited to a frame having parallel arms) when under compression or tension force. When the respective compression or tension force is relieved, theframe 16 tends to return to its original shape, i.e., the ends 25 of arms 24 opposite bridge 26 return to their original spaced relationship, and the arms therefore assume their original, spaced apart relationship. When subjected to loads in this manner, frame 16 acts as both a “backbone” and as a spring to help both bear compression loads and relieve tension loads in a manner that mimics normal disc function. - Note also that when the
implant body 12 is inserted into the intervertebral disc space, the bridge 26 offrame 16 is positioned posteriorally relative to theends 25 of arms 24 opposite bridge 26. The spring function offrame 16 is advantageous because, as the patient bends forward, the ends of arms 24 opposite bridge 26 are subjected to compression loads, and the further the patient bends, the more thematerial comprising frame 16 tends to resist the compression load, providing the spring function discussed above. As best shown inFIG. 4 , the bridge 26 offrame 16 is provided with aprojection 34 that extends between the arms 24 that functions to limit the bending of the arms 24, thereby limiting the flexure of the spinal column at the vertebrae adjacent theimplant body 12. Further, biomechanical studies of normal, healthy spines have shown that the axis of rotation (the weight-bearing center of the intervertebral disc) translates anteriorally and posteriorally as the spine flexes and extends, and the variable resistance provided by this configuration and placement offrame 16 in the intervertebral disc space helps provide this normal front-to-back shift in the axis of rotation so that the disc implant of the present invention replicates that shifting in the axis of rotation. - As noted above,
implant body 12 is provided with acavity 18 and after positioning theimplant body 12 in the space from which a portion of the intervertebral disc has been removed and removing the key 14 fromcavity 18, theframe 16 is inserted into the cavity in place of the key. As is best shown inFIG. 4 ,frame 16 does not extend all of the way into theelongate cavity 18, leaving a space that in the preferred embodiment is at least partially filled with a hydrogel such as a polyvinyl alcohol (PVA), synthetic silk-elastin copolymers, polymethyl- or polyethylmethacrylate, polyethylene or polyacrylonitrile that absorbs water and increases in volume upon absorption of water, thereby functioning to maintain disc height in a manner similar to the manner in which the healthy disc maintains proper spacing between adjacent vertebrae. As best shown inFIGS. 3-5 , thecentral projection 34 of the bridge 26 ofbody 12 is provided with aport 38 through which hydrogel is added (or removed) from the portion of thecavity 18 that is not occupied byframe 16.Port 38 is comprised of a channel that extends through thecentral projection 34 into thecavity 18 and the surgeon injects the hydrogel (or uses a syringe to remove hydrogel) as needed to confer the desired amount of initial disc height to the implantedbody 12. Once the desired disc height is obtained, theport 38 is capped or plugged to prevent extrusion of the hydrogel contained withincavity 18. In an alternative embodiment, a one-way valve of a type known in the art may be utilized for this purpose. As described above, thecavity 18 is provided with a portion having expanded dimensions (as compared to the dimensions of the portion ofcavity 18 proximate the opening into the cavity) for the purpose of allowing the injection of increased amounts of hydrogel for extra adjustability in obtaining the desired disc height. Some or all of theprongs 22 used to resist anterior-posterior movement of theimplant body 12 in the disc space are provided withchannels 40 communicating withcavity 18 for the purpose of allowing ingress and egress of fluid into and out of the hydrogel contained incavity 18. - The positioning of
frame 16 only part way into thecavity 18 inbody 12 serves an additional purpose. The spring function offrame 16 provides resistance to compression and tension loads, but it also functions to allow anterior-posterior translation of the axis of rotation as the spine flexes so as to mimic the kinematics of the healthy disc. First, because of the resilient nature of thematerial comprising body 12, the portion of thematerial comprising body 12 that is positioned between the arms 24 offrame 16 and the bearing surfaces of the vertebral bodies of the adjacent vertebrae provides additional cushioning and resistance to the deformation of theframe 16 under extraordinary compression load. Second, because it extends only part way into thecavity 18 ofbody 12, thebody 12 having theframe 16 positioned therein provides different amounts of resistance to compression load as the patient bends. The resistance to compression provided by the location offrame 16 part way intocavity 18 is greater as spinal flexion increases compared to the resistance to compression provided by the portion ofimplant body 12 in which the resistance to compression is provided by thematerial comprising body 12 and the hydrogel located in the portion ofcavity 18 into whichframe 16 does not extend. Of course the surgeon has the opportunity to fine-tune the amount of resistance as the spine flexes and/or extends by utilizing a frame with arms 24 of greater or shorter length so as to provide less or more resistance to flexure, respectively, and by adding or removing hydrogel in the portion of thecavity 18 into whichframe 16 does not extend. - The healthy intervertebral disc includes three parts, the nucleus pulposus, annulus fibrosus, and cartilagenous endplate, each with separate functions, and all of which cooperate to provide motion, load bearing characteristics, and the other functions of the intact spinal column. The
intervertebral disc implant 10 of the present invention provides corresponding parts, with their corresponding contribution to function, in the form of theimplant body 12, which functions in a manner similar to the annulus fibrosus to maintain disc height, the frame-filled and hydrogel-filledcavity 18 which functions in a manner similar to the nucleus pulposus to distribute load and resist compression and tension, and the roughened surface of the metal strips 20 onsurfaces 36, which functions in a manner similar to the cartilagenous endplate by providing a surface that facilitates ingrowth of the bone, thereby making the intervertebral implant of the present invention an integral part of the spinal column. As noted above, the surfaces of the metal strips 20 may be provided withprongs 22 or other structure for engaging the adjacent vertebrae to resist anterior-posterior movement of theimplant 10 in the intervertebral disc space, but ingrowth of bone, facilitated by the roughened surface and/or surface coating onstrips 20, is particularly advantageous in retaining theimplant 10 in the disc space. - Those skilled in the art who have the benefit of this disclosure will recognize that certain changes can be made to the component parts of the apparatus of the present invention without changing the manner in which those parts function and/or interact to achieve their intended result. By way of example, those skilled in the art who have the benefit of this disclosure will recognize that the amount of resistance to compression and/or tension load provided by the
frame 16 depends on such factors as the length of the arms 24 and the material comprising theframe 16 and that although it may be appropriate to implant an artificial disc constructed in accordance with the teachings of the present invention having a frame with a certain level of resistance to compression/tension load, it may be that an intervertebral disc including a frame with a different level of resistance to compression/tension load is better suited for implantation in another patient. It will also be recognized by those skilled in the art that to obtain desirable load resistance properties, it may be advantageous to increase the thickness of thecentral projection 34 so as to limit movement of the arms 24 toward each other under compression load or to make theimplant body 12 from a combination of materials, with an embedded layer of material that is relatively incompressible or having a second set of resilience and/or load-bearing characteristics, or as a laminated “sandwich” of polyurethane and other material(s), each material adding a unique component to the load bearing characteristics of theimplant body 12. All such changes, and others that will be clear to those skilled in the art from this description of the preferred embodiments of the invention, are intended to fall within the scope of the following, non-limiting claims.
Claims (14)
1. An intervertebral disc implant comprising an elongate body comprised of a resilient material having a cavity extending longitudinally into said body and a frame received within the cavity in said body comprised of two spaced apart arms with a bridge connecting the arms at one end, said frame being comprised of a material that tends to return to its original shape after said frame is subjected to either a compression or tension load, said frame extending only part way into the cavity of said body in which it is received.
2. The intervertebral disc implant of claim 1 wherein said frame is provided with a port for receiving an injection of hydrogel therein.
3. The intervertebral disc implant of claim 2 wherein said port is positioned so that the hydrogel injected into said port fills the portion of the cavity into which said frame does not extend.
4. The intervertebral disc implant of claim 1 additionally comprising a metal strip attached to at least a portion of the surfaces of said body that bear against adjacent vertebrae when implanted into the intervertebral disc space, said metal strip being provided with structure for contacting the adjacent vertebrae to resist movement of said body relative to the adjacent vertebrae.
5. The intervertebral disc implant of claim 4 wherein at least a portion of said metal strip is provided with a coating of or comprises porous or roughened titanium, calcium phosphate, titanium wire mesh, plasma-sprayed titanium, porous cobalt-chromium, or hydroxyapatite.
6. The intervertebral disc implant of claim 1 additionally comprising a key positioned in the cavity in said body and extending substantially all the way into the cavity, said key being withdrawn from the cavity after said body is implanted into the space between two adjacent vertebrae and before said frame is inserted into the cavity in place of said key.
7. The intervertebral disc implant of claim 1 additionally comprising a “U”-shaped ear extending at approximately a right angle from the end of one of the arms opposite the bridge and having a hole formed therein for receiving a screw for attaching said frame to a first adjacent vertebra and a “Y”-shaped ear extending at approximately a right angle from the end of the other arm opposite the bridge having holes formed in both forks of the Y-shaped ear for receiving screws for attaching said frame to a second adjacent vertebra.
8. The intervertebral disc implant of claim 1 additionally comprising a projection extending from the bridge between the arms of said frame.
9. The intervertebral disc implant of claim 1 wherein the arms of said frame are angled apart from each other.
10. A method of mimicking the function of the intervertebral disc of the intact spinal column after removal of some or all of the intervertebral disc from between two adjacent vertebrae comprising the steps of:
inserting a first resilient body having a cavity formed therein and a key received in the cavity into the intervertebral disc space with the height of the body oriented substantially parallel to the longitudinal axis of the spinal column;
removing the key from the cavity after the body is inserted into the intervertebral disc space;
inserting a frame part way into the cavity in the body, the frame comprising first and second arms spaced apart arms connected by a bridge at one end for providing resistance to flexion and/or extension of the spinal column; and
filling the portion of the cavity in the body into which the frame does not extend with a hydrogel.
11. The method of claim 10 additionally comprising attaching the frame to the adjacent first and second vertebrae.
12. The method of claim 10 additionally comprising resisting anterior or posterior movement of the body in the intervertebral disc space.
13. The method of claim 10 additionally comprising limiting the movement of the arms of the frame as the spinal column flexes.
14. The method of claim 10 additionally comprising resisting relative movement between the frame and the implant body.
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US11/440,552 US20060282165A1 (en) | 2004-03-19 | 2006-05-25 | Intervertebral disc implant |
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US11/195,880 US8480742B2 (en) | 2005-08-02 | 2005-08-02 | Total artificial disc |
US11/246,981 US20070032873A1 (en) | 2005-08-02 | 2005-10-07 | Total artificial intervertebral disc |
US11/440,552 US20060282165A1 (en) | 2004-03-19 | 2006-05-25 | Intervertebral disc implant |
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US11/246,961 Continuation-In-Part US7430364B2 (en) | 2005-10-07 | 2005-10-07 | Cooler head vaporizer |
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Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050278025A1 (en) * | 2004-06-10 | 2005-12-15 | Salumedica Llc | Meniscus prosthesis |
US20080241206A1 (en) * | 2007-03-30 | 2008-10-02 | Constantz Brent R | Calcium phosphate cements comprising autologous bone |
US7682540B2 (en) | 2004-02-06 | 2010-03-23 | Georgia Tech Research Corporation | Method of making hydrogel implants |
US7910124B2 (en) | 2004-02-06 | 2011-03-22 | Georgia Tech Research Corporation | Load bearing biocompatible device |
US20110071636A1 (en) * | 2009-09-18 | 2011-03-24 | National Yang Ming University | Displacement Leaf Spring and Artificial Intervertebral Disc Containing the Same |
US20110093075A1 (en) * | 2008-04-22 | 2011-04-21 | Kinetic Spine Technologies Inc. | Artificial intervertebral spacer |
EP2419145A2 (en) * | 2009-04-16 | 2012-02-22 | Warsaw Orthopedic, Inc. | Vertebral endplate connection implant and method |
US20130197643A1 (en) * | 2012-01-31 | 2013-08-01 | Blackstone Medical, Inc. | Intervertebral disc prosthesis and method |
US20140058446A1 (en) * | 2011-09-28 | 2014-02-27 | Avi Bernstein | Spinal implant system |
US8740983B1 (en) | 2009-11-11 | 2014-06-03 | Nuvasive, Inc. | Spinal fusion implants and related methods |
US8840668B1 (en) | 2009-11-11 | 2014-09-23 | Nuvasive, Inc. | Spinal implants, instruments and related methods |
US20150119992A1 (en) * | 2010-02-01 | 2015-04-30 | X-Spine Systems, Inc. | Spinal implant co-insertion system and method |
US9155543B2 (en) | 2011-05-26 | 2015-10-13 | Cartiva, Inc. | Tapered joint implant and related tools |
US9198768B1 (en) * | 2014-05-07 | 2015-12-01 | Perumala Corporation | Enhanced artificial disk |
USD745159S1 (en) | 2013-10-10 | 2015-12-08 | Nuvasive, Inc. | Intervertebral implant |
US9439773B2 (en) | 2014-05-07 | 2016-09-13 | Perumala Corporation | Enhanced artificial disk |
US9668875B2 (en) | 1999-03-07 | 2017-06-06 | Nuvasive, Inc. | Method and apparatus for computerized surgery |
US9907663B2 (en) | 2015-03-31 | 2018-03-06 | Cartiva, Inc. | Hydrogel implants with porous materials and methods |
US10327910B2 (en) | 2013-03-14 | 2019-06-25 | X-Spine Systems, Inc. | Spinal implant and assembly |
US10350072B2 (en) | 2012-05-24 | 2019-07-16 | Cartiva, Inc. | Tooling for creating tapered opening in tissue and related methods |
USD858769S1 (en) | 2014-11-20 | 2019-09-03 | Nuvasive, Inc. | Intervertebral implant |
US10758374B2 (en) | 2015-03-31 | 2020-09-01 | Cartiva, Inc. | Carpometacarpal (CMC) implants and methods |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030008396A1 (en) * | 1999-03-17 | 2003-01-09 | Ku David N. | Poly(vinyl alcohol) hydrogel |
AU2004212942A1 (en) | 2003-02-14 | 2004-09-02 | Depuy Spine, Inc. | In-situ formed intervertebral fusion device |
US20040267367A1 (en) | 2003-06-30 | 2004-12-30 | Depuy Acromed, Inc | Intervertebral implant with conformable endplate |
US8636802B2 (en) | 2004-03-06 | 2014-01-28 | DePuy Synthes Products, LLC | Dynamized interspinal implant |
US8105382B2 (en) | 2006-12-07 | 2012-01-31 | Interventional Spine, Inc. | Intervertebral implant |
US8900307B2 (en) | 2007-06-26 | 2014-12-02 | DePuy Synthes Products, LLC | Highly lordosed fusion cage |
US20090134325A1 (en) * | 2007-11-27 | 2009-05-28 | Goldman Mildred M | Methods for detecting estradiol by mass spectrometry |
US8916385B2 (en) | 2007-12-13 | 2014-12-23 | Quest Diagnostics Investments, Inc. | Methods for detecting estrone by mass spectrometry |
CN101909548B (en) | 2008-01-17 | 2014-07-30 | 斯恩蒂斯有限公司 | An expandable intervertebral implant and associated method of manufacturing the same |
US8333804B1 (en) * | 2008-03-27 | 2012-12-18 | Spinelogik, Inc. | Intervertebral fusion device and method of use |
US8313528B1 (en) | 2008-03-27 | 2012-11-20 | Spinelogik, Inc. | Intervertebral fusion device and method of use |
WO2009124269A1 (en) | 2008-04-05 | 2009-10-08 | Synthes Usa, Llc | Expandable intervertebral implant |
US8172902B2 (en) * | 2008-07-17 | 2012-05-08 | Spinemedica, Llc | Spinal interbody spacers |
US20100100185A1 (en) * | 2008-10-22 | 2010-04-22 | Warsaw Orthopedic, Inc. | Intervertebral Disc Prosthesis Having Viscoelastic Properties |
US9526620B2 (en) | 2009-03-30 | 2016-12-27 | DePuy Synthes Products, Inc. | Zero profile spinal fusion cage |
US9393129B2 (en) | 2009-12-10 | 2016-07-19 | DePuy Synthes Products, Inc. | Bellows-like expandable interbody fusion cage |
US9427324B1 (en) | 2010-02-22 | 2016-08-30 | Spinelogik, Inc. | Intervertebral fusion device and method of use |
US9907560B2 (en) | 2010-06-24 | 2018-03-06 | DePuy Synthes Products, Inc. | Flexible vertebral body shavers |
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TW201215379A (en) | 2010-06-29 | 2012-04-16 | Synthes Gmbh | Distractible intervertebral implant |
US9402732B2 (en) | 2010-10-11 | 2016-08-02 | DePuy Synthes Products, Inc. | Expandable interspinous process spacer implant |
US9522070B2 (en) | 2013-03-07 | 2016-12-20 | Interventional Spine, Inc. | Intervertebral implant |
US10071243B2 (en) | 2013-07-31 | 2018-09-11 | Medtronic, Inc. | Fixation for implantable medical devices |
US9198774B2 (en) | 2013-11-21 | 2015-12-01 | Perumala Corporation | Intervertebral disk cage and stabilizer |
US11426290B2 (en) | 2015-03-06 | 2022-08-30 | DePuy Synthes Products, Inc. | Expandable intervertebral implant, system, kit and method |
US10099050B2 (en) | 2016-01-21 | 2018-10-16 | Medtronic, Inc. | Interventional medical devices, device systems, and fixation components thereof |
JP7019616B2 (en) | 2016-06-28 | 2022-02-15 | イーアイティー・エマージング・インプラント・テクノロジーズ・ゲーエムベーハー | Expandable and angle adjustable intervertebral cage with range of motion joints |
JP6995789B2 (en) | 2016-06-28 | 2022-01-17 | イーアイティー・エマージング・インプラント・テクノロジーズ・ゲーエムベーハー | Expandable and angle adjustable intervertebral cage |
US10888433B2 (en) | 2016-12-14 | 2021-01-12 | DePuy Synthes Products, Inc. | Intervertebral implant inserter and related methods |
US10398563B2 (en) | 2017-05-08 | 2019-09-03 | Medos International Sarl | Expandable cage |
US11344424B2 (en) | 2017-06-14 | 2022-05-31 | Medos International Sarl | Expandable intervertebral implant and related methods |
US10940016B2 (en) | 2017-07-05 | 2021-03-09 | Medos International Sarl | Expandable intervertebral fusion cage |
US11446156B2 (en) | 2018-10-25 | 2022-09-20 | Medos International Sarl | Expandable intervertebral implant, inserter instrument, and related methods |
US11759632B2 (en) | 2019-03-28 | 2023-09-19 | Medtronic, Inc. | Fixation components for implantable medical devices |
US11426286B2 (en) | 2020-03-06 | 2022-08-30 | Eit Emerging Implant Technologies Gmbh | Expandable intervertebral implant |
US11850160B2 (en) | 2021-03-26 | 2023-12-26 | Medos International Sarl | Expandable lordotic intervertebral fusion cage |
US11752009B2 (en) | 2021-04-06 | 2023-09-12 | Medos International Sarl | Expandable intervertebral fusion cage |
Citations (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4309777A (en) * | 1980-11-13 | 1982-01-12 | Patil Arun A | Artificial intervertebral disc |
US4401112A (en) * | 1980-09-15 | 1983-08-30 | Rezaian Seyed M | Spinal fixator |
US4553273A (en) * | 1983-11-23 | 1985-11-19 | Henry Ford Hospital | Vertebral body prosthesis and spine stabilizing method |
US4657550A (en) * | 1984-12-21 | 1987-04-14 | Daher Youssef H | Buttressing device usable in a vertebral prosthesis |
US4759769A (en) * | 1987-02-12 | 1988-07-26 | Health & Research Services Inc. | Artificial spinal disc |
US4863476A (en) * | 1986-08-29 | 1989-09-05 | Shepperd John A N | Spinal implant |
US4865608A (en) * | 1987-11-20 | 1989-09-12 | Brooker Jr Andrew F | Grooved endoprosthesis |
US4932975A (en) * | 1989-10-16 | 1990-06-12 | Vanderbilt University | Vertebral prosthesis |
US5002576A (en) * | 1988-06-06 | 1991-03-26 | Mecron Medizinische Produkte Gmbh | Intervertebral disk endoprosthesis |
US5059193A (en) * | 1989-11-20 | 1991-10-22 | Spine-Tech, Inc. | Expandable spinal implant and surgical method |
US5123926A (en) * | 1991-02-22 | 1992-06-23 | Madhavan Pisharodi | Artificial spinal prosthesis |
US5171278A (en) * | 1991-02-22 | 1992-12-15 | Madhavan Pisharodi | Middle expandable intervertebral disk implants |
US5236460A (en) * | 1990-02-12 | 1993-08-17 | Midas Rex Pneumatic Tools, Inc. | Vertebral body prosthesis |
US5290312A (en) * | 1991-09-03 | 1994-03-01 | Alphatec | Artificial vertebral body |
US5390683A (en) * | 1991-02-22 | 1995-02-21 | Pisharodi; Madhavan | Spinal implantation methods utilizing a middle expandable implant |
US5443514A (en) * | 1993-10-01 | 1995-08-22 | Acromed Corporation | Method for using spinal implants |
US5458641A (en) * | 1993-09-08 | 1995-10-17 | Ramirez Jimenez; Juan J. | Vertebral body prosthesis |
US5522899A (en) * | 1988-06-28 | 1996-06-04 | Sofamor Danek Properties, Inc. | Artificial spinal fusion implants |
US5653762A (en) * | 1994-03-18 | 1997-08-05 | Pisharodi; Madhavan | Method of stabilizing adjacent vertebrae with rotating, lockable, middle-expanded intervertebral disk stabilizer |
US5658335A (en) * | 1995-03-09 | 1997-08-19 | Cohort Medical Products Group, Inc. | Spinal fixator |
US5658336A (en) * | 1994-03-18 | 1997-08-19 | Pisharodi; Madhavan | Rotating, locking, middle-expanded intervertebral disk stabilizer |
US5669909A (en) * | 1995-03-27 | 1997-09-23 | Danek Medical, Inc. | Interbody fusion device and method for restoration of normal spinal anatomy |
US5755796A (en) * | 1996-06-06 | 1998-05-26 | Ibo; Ivo | Prosthesis of the cervical intervertebralis disk |
US5800550A (en) * | 1996-03-13 | 1998-09-01 | Sertich; Mario M. | Interbody fusion cage |
US5827328A (en) * | 1996-11-22 | 1998-10-27 | Buttermann; Glenn R. | Intervertebral prosthetic device |
US5865846A (en) * | 1994-11-14 | 1999-02-02 | Bryan; Vincent | Human spinal disc prosthesis |
US5888223A (en) * | 1995-12-08 | 1999-03-30 | Bray, Jr.; Robert S. | Anterior stabilization device |
US5893890A (en) * | 1994-03-18 | 1999-04-13 | Perumala Corporation | Rotating, locking intervertebral disk stabilizer and applicator |
US5980522A (en) * | 1994-07-22 | 1999-11-09 | Koros; Tibor | Expandable spinal implants |
US5989291A (en) * | 1998-02-26 | 1999-11-23 | Third Millennium Engineering, Llc | Intervertebral spacer device |
US6019793A (en) * | 1996-10-21 | 2000-02-01 | Synthes | Surgical prosthetic device |
US6093205A (en) * | 1997-06-25 | 2000-07-25 | Bridport-Gundry Plc C/O Pearsalls Implants | Surgical implant |
US6102950A (en) * | 1999-01-19 | 2000-08-15 | Vaccaro; Alex | Intervertebral body fusion device |
US6176882B1 (en) * | 1998-02-20 | 2001-01-23 | Biedermann Motech Gmbh | Intervertebral implant |
US6264655B1 (en) * | 1995-06-07 | 2001-07-24 | Madhavan Pisharodi | Cervical disk and spinal stabilizer |
US6264695B1 (en) * | 1999-09-30 | 2001-07-24 | Replication Medical, Inc. | Spinal nucleus implant |
US6309421B1 (en) * | 1994-03-18 | 2001-10-30 | Madhavan Pisharodi | Rotating, locking intervertebral disk stabilizer and applicator |
US6419704B1 (en) * | 1999-10-08 | 2002-07-16 | Bret Ferree | Artificial intervertebral disc replacement methods and apparatus |
US6419705B1 (en) * | 1999-06-23 | 2002-07-16 | Sulzer Spine-Tech Inc. | Expandable fusion device and method |
US6419724B1 (en) * | 1997-12-03 | 2002-07-16 | Sidmar N.V. | Method for reducing iron oxides and for melting iron and installations therefor |
US6428576B1 (en) * | 1999-04-16 | 2002-08-06 | Endospine, Ltd. | System for repairing inter-vertebral discs |
US6454806B1 (en) * | 1999-07-26 | 2002-09-24 | Advanced Prosthetic Technologies, Inc. | Spinal surgical prosthesis |
US6478822B1 (en) * | 2001-03-20 | 2002-11-12 | Spineco, Inc. | Spherical spinal implant |
US6669731B2 (en) * | 2001-10-18 | 2003-12-30 | Spinecore, Inc. | Intervertebral spacer device having a slotted domed arch strip spring |
US6682563B2 (en) * | 2002-03-04 | 2004-01-27 | Michael S. Scharf | Spinal fixation device |
US6863689B2 (en) * | 2001-07-16 | 2005-03-08 | Spinecore, Inc. | Intervertebral spacer having a flexible wire mesh vertebral body contact element |
US6936070B1 (en) * | 2001-01-17 | 2005-08-30 | Nabil L. Muhanna | Intervertebral disc prosthesis and methods of implantation |
US7320708B1 (en) * | 2002-11-13 | 2008-01-22 | Sdgi Holdings, Inc. | Cervical interbody device |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5425773A (en) * | 1992-01-06 | 1995-06-20 | Danek Medical, Inc. | Intervertebral disk arthroplasty device |
DE4213771C1 (en) * | 1992-04-27 | 1993-09-30 | Eska Medical Gmbh & Co | Spinal disc endoprosthesis - has elastic core with rim beading between shaped cover plates with a screw bonding for implantation without adhesive |
US5893889A (en) * | 1997-06-20 | 1999-04-13 | Harrington; Michael | Artificial disc |
FR2787018B1 (en) * | 1998-12-11 | 2001-03-02 | Dimso Sa | INTERVERTEBRAL DISC PROSTHESIS WITH LIQUID ENCLOSURE |
FR2787014B1 (en) * | 1998-12-11 | 2001-03-02 | Dimso Sa | INTERVERTEBRAL DISC PROSTHESIS WITH REDUCED FRICTION |
US6342074B1 (en) * | 1999-04-30 | 2002-01-29 | Nathan S. Simpson | Anterior lumbar interbody fusion implant and method for fusing adjacent vertebrae |
CA2376097A1 (en) * | 1999-06-04 | 2000-12-14 | Sdgi Holdings, Inc. | Artificial disc implant |
AU2001261969A1 (en) * | 2000-05-25 | 2001-12-03 | Neurortho Implants Design, Llc | Inter-vertebral disc prosthesis for rachis for an anterior surgery thereof |
US6533817B1 (en) * | 2000-06-05 | 2003-03-18 | Raymedica, Inc. | Packaged, partially hydrated prosthetic disc nucleus |
EP1399100A1 (en) * | 2001-06-27 | 2004-03-24 | Mathys Medizinaltechnik AG | Intervertebral disk prosthesis |
US6736850B2 (en) * | 2001-12-28 | 2004-05-18 | Spinal Concepts, Inc. | Vertebral pseudo arthrosis device and method |
US6974479B2 (en) * | 2002-12-10 | 2005-12-13 | Sdgi Holdings, Inc. | System and method for blocking and/or retaining a prosthetic spinal implant |
EP2060280A3 (en) * | 2003-04-30 | 2009-05-27 | Drexel University | Thermogelling polymer blends for biomaterial applications |
KR20050004526A (en) * | 2003-07-02 | 2005-01-12 | 김현집 | Composited dressing case for having all make-up tools |
US7282065B2 (en) * | 2004-04-09 | 2007-10-16 | X-Spine Systems, Inc. | Disk augmentation system and method |
-
2005
- 2005-08-02 US US11/195,880 patent/US8480742B2/en active Active
-
2006
- 2006-05-25 US US11/440,552 patent/US20060282165A1/en not_active Abandoned
- 2006-08-02 WO PCT/US2006/030267 patent/WO2007016673A2/en active Application Filing
Patent Citations (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401112A (en) * | 1980-09-15 | 1983-08-30 | Rezaian Seyed M | Spinal fixator |
US4309777A (en) * | 1980-11-13 | 1982-01-12 | Patil Arun A | Artificial intervertebral disc |
US4553273A (en) * | 1983-11-23 | 1985-11-19 | Henry Ford Hospital | Vertebral body prosthesis and spine stabilizing method |
US4657550A (en) * | 1984-12-21 | 1987-04-14 | Daher Youssef H | Buttressing device usable in a vertebral prosthesis |
US4863476A (en) * | 1986-08-29 | 1989-09-05 | Shepperd John A N | Spinal implant |
US4759769A (en) * | 1987-02-12 | 1988-07-26 | Health & Research Services Inc. | Artificial spinal disc |
US4865608A (en) * | 1987-11-20 | 1989-09-12 | Brooker Jr Andrew F | Grooved endoprosthesis |
US5002576A (en) * | 1988-06-06 | 1991-03-26 | Mecron Medizinische Produkte Gmbh | Intervertebral disk endoprosthesis |
US5522899A (en) * | 1988-06-28 | 1996-06-04 | Sofamor Danek Properties, Inc. | Artificial spinal fusion implants |
US4932975A (en) * | 1989-10-16 | 1990-06-12 | Vanderbilt University | Vertebral prosthesis |
US5059193A (en) * | 1989-11-20 | 1991-10-22 | Spine-Tech, Inc. | Expandable spinal implant and surgical method |
US5236460A (en) * | 1990-02-12 | 1993-08-17 | Midas Rex Pneumatic Tools, Inc. | Vertebral body prosthesis |
US5123926A (en) * | 1991-02-22 | 1992-06-23 | Madhavan Pisharodi | Artificial spinal prosthesis |
US5171278A (en) * | 1991-02-22 | 1992-12-15 | Madhavan Pisharodi | Middle expandable intervertebral disk implants |
US5390683A (en) * | 1991-02-22 | 1995-02-21 | Pisharodi; Madhavan | Spinal implantation methods utilizing a middle expandable implant |
US5290312A (en) * | 1991-09-03 | 1994-03-01 | Alphatec | Artificial vertebral body |
US5458641A (en) * | 1993-09-08 | 1995-10-17 | Ramirez Jimenez; Juan J. | Vertebral body prosthesis |
US5443514A (en) * | 1993-10-01 | 1995-08-22 | Acromed Corporation | Method for using spinal implants |
US6309421B1 (en) * | 1994-03-18 | 2001-10-30 | Madhavan Pisharodi | Rotating, locking intervertebral disk stabilizer and applicator |
US5893890A (en) * | 1994-03-18 | 1999-04-13 | Perumala Corporation | Rotating, locking intervertebral disk stabilizer and applicator |
US5658336A (en) * | 1994-03-18 | 1997-08-19 | Pisharodi; Madhavan | Rotating, locking, middle-expanded intervertebral disk stabilizer |
US5653762A (en) * | 1994-03-18 | 1997-08-05 | Pisharodi; Madhavan | Method of stabilizing adjacent vertebrae with rotating, lockable, middle-expanded intervertebral disk stabilizer |
US5980522A (en) * | 1994-07-22 | 1999-11-09 | Koros; Tibor | Expandable spinal implants |
US5865846A (en) * | 1994-11-14 | 1999-02-02 | Bryan; Vincent | Human spinal disc prosthesis |
US5658335A (en) * | 1995-03-09 | 1997-08-19 | Cohort Medical Products Group, Inc. | Spinal fixator |
US5669909A (en) * | 1995-03-27 | 1997-09-23 | Danek Medical, Inc. | Interbody fusion device and method for restoration of normal spinal anatomy |
US6264655B1 (en) * | 1995-06-07 | 2001-07-24 | Madhavan Pisharodi | Cervical disk and spinal stabilizer |
US5888223A (en) * | 1995-12-08 | 1999-03-30 | Bray, Jr.; Robert S. | Anterior stabilization device |
US5800550A (en) * | 1996-03-13 | 1998-09-01 | Sertich; Mario M. | Interbody fusion cage |
US5755796A (en) * | 1996-06-06 | 1998-05-26 | Ibo; Ivo | Prosthesis of the cervical intervertebralis disk |
US6019793A (en) * | 1996-10-21 | 2000-02-01 | Synthes | Surgical prosthetic device |
US5827328A (en) * | 1996-11-22 | 1998-10-27 | Buttermann; Glenn R. | Intervertebral prosthetic device |
US6093205A (en) * | 1997-06-25 | 2000-07-25 | Bridport-Gundry Plc C/O Pearsalls Implants | Surgical implant |
US6419724B1 (en) * | 1997-12-03 | 2002-07-16 | Sidmar N.V. | Method for reducing iron oxides and for melting iron and installations therefor |
US6176882B1 (en) * | 1998-02-20 | 2001-01-23 | Biedermann Motech Gmbh | Intervertebral implant |
US5989291A (en) * | 1998-02-26 | 1999-11-23 | Third Millennium Engineering, Llc | Intervertebral spacer device |
US6102950A (en) * | 1999-01-19 | 2000-08-15 | Vaccaro; Alex | Intervertebral body fusion device |
US6428576B1 (en) * | 1999-04-16 | 2002-08-06 | Endospine, Ltd. | System for repairing inter-vertebral discs |
US6419705B1 (en) * | 1999-06-23 | 2002-07-16 | Sulzer Spine-Tech Inc. | Expandable fusion device and method |
US6454806B1 (en) * | 1999-07-26 | 2002-09-24 | Advanced Prosthetic Technologies, Inc. | Spinal surgical prosthesis |
US6264695B1 (en) * | 1999-09-30 | 2001-07-24 | Replication Medical, Inc. | Spinal nucleus implant |
US6419704B1 (en) * | 1999-10-08 | 2002-07-16 | Bret Ferree | Artificial intervertebral disc replacement methods and apparatus |
US6936070B1 (en) * | 2001-01-17 | 2005-08-30 | Nabil L. Muhanna | Intervertebral disc prosthesis and methods of implantation |
US6478822B1 (en) * | 2001-03-20 | 2002-11-12 | Spineco, Inc. | Spherical spinal implant |
US6863689B2 (en) * | 2001-07-16 | 2005-03-08 | Spinecore, Inc. | Intervertebral spacer having a flexible wire mesh vertebral body contact element |
US6669731B2 (en) * | 2001-10-18 | 2003-12-30 | Spinecore, Inc. | Intervertebral spacer device having a slotted domed arch strip spring |
US6887273B2 (en) * | 2001-10-18 | 2005-05-03 | Spinecore, Inc. | Intervertebral spacer device having a domed arch shaped spring |
US6682563B2 (en) * | 2002-03-04 | 2004-01-27 | Michael S. Scharf | Spinal fixation device |
US7320708B1 (en) * | 2002-11-13 | 2008-01-22 | Sdgi Holdings, Inc. | Cervical interbody device |
Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9668875B2 (en) | 1999-03-07 | 2017-06-06 | Nuvasive, Inc. | Method and apparatus for computerized surgery |
US8002830B2 (en) | 2004-02-06 | 2011-08-23 | Georgia Tech Research Corporation | Surface directed cellular attachment |
US7682540B2 (en) | 2004-02-06 | 2010-03-23 | Georgia Tech Research Corporation | Method of making hydrogel implants |
US7910124B2 (en) | 2004-02-06 | 2011-03-22 | Georgia Tech Research Corporation | Load bearing biocompatible device |
US8895073B2 (en) | 2004-02-06 | 2014-11-25 | Georgia Tech Research Corporation | Hydrogel implant with superficial pores |
US8486436B2 (en) | 2004-02-06 | 2013-07-16 | Georgia Tech Research Corporation | Articular joint implant |
US8142808B2 (en) | 2004-02-06 | 2012-03-27 | Georgia Tech Research Corporation | Method of treating joints with hydrogel implants |
US8318192B2 (en) | 2004-02-06 | 2012-11-27 | Georgia Tech Research Corporation | Method of making load bearing hydrogel implants |
US20050278025A1 (en) * | 2004-06-10 | 2005-12-15 | Salumedica Llc | Meniscus prosthesis |
WO2008121990A1 (en) * | 2007-03-30 | 2008-10-09 | Skeletal Kinetics, Llc. | Calcium phosphate cements comprising autologous bone |
US7658940B2 (en) | 2007-03-30 | 2010-02-09 | Skeletal Kinetics, Llc | Calcium phosphate cements comprising autologous bone |
US20110004219A1 (en) * | 2007-03-30 | 2011-01-06 | Constantz Brent R | Calcium Phosphate Cements Comprising Autologous Bone |
US20080241206A1 (en) * | 2007-03-30 | 2008-10-02 | Constantz Brent R | Calcium phosphate cements comprising autologous bone |
US8603176B2 (en) * | 2008-04-22 | 2013-12-10 | Kinetic Spine Technologies Inc. | Artificial intervertebral spacer |
US20110093075A1 (en) * | 2008-04-22 | 2011-04-21 | Kinetic Spine Technologies Inc. | Artificial intervertebral spacer |
EP2419145A2 (en) * | 2009-04-16 | 2012-02-22 | Warsaw Orthopedic, Inc. | Vertebral endplate connection implant and method |
US20110071636A1 (en) * | 2009-09-18 | 2011-03-24 | National Yang Ming University | Displacement Leaf Spring and Artificial Intervertebral Disc Containing the Same |
US8740983B1 (en) | 2009-11-11 | 2014-06-03 | Nuvasive, Inc. | Spinal fusion implants and related methods |
US8840668B1 (en) | 2009-11-11 | 2014-09-23 | Nuvasive, Inc. | Spinal implants, instruments and related methods |
US20150119992A1 (en) * | 2010-02-01 | 2015-04-30 | X-Spine Systems, Inc. | Spinal implant co-insertion system and method |
US9155543B2 (en) | 2011-05-26 | 2015-10-13 | Cartiva, Inc. | Tapered joint implant and related tools |
US11944545B2 (en) | 2011-05-26 | 2024-04-02 | Cartiva, Inc. | Implant introducer |
US11278411B2 (en) | 2011-05-26 | 2022-03-22 | Cartiva, Inc. | Devices and methods for creating wedge-shaped recesses |
US10376368B2 (en) | 2011-05-26 | 2019-08-13 | Cartiva, Inc. | Devices and methods for creating wedge-shaped recesses |
US9526632B2 (en) | 2011-05-26 | 2016-12-27 | Cartiva, Inc. | Methods of repairing a joint using a wedge-shaped implant |
US20140058446A1 (en) * | 2011-09-28 | 2014-02-27 | Avi Bernstein | Spinal implant system |
US9814594B2 (en) | 2012-01-31 | 2017-11-14 | Blackstone Medical, Inc. | Intervertebral disc prosthesis and method |
US9198764B2 (en) * | 2012-01-31 | 2015-12-01 | Blackstone Medical, Inc. | Intervertebral disc prosthesis and method |
US9283085B2 (en) | 2012-01-31 | 2016-03-15 | Blackstone Medical, Inc. | Intervertebral disc prosthesis and method |
US20130197643A1 (en) * | 2012-01-31 | 2013-08-01 | Blackstone Medical, Inc. | Intervertebral disc prosthesis and method |
US10350072B2 (en) | 2012-05-24 | 2019-07-16 | Cartiva, Inc. | Tooling for creating tapered opening in tissue and related methods |
US10327910B2 (en) | 2013-03-14 | 2019-06-25 | X-Spine Systems, Inc. | Spinal implant and assembly |
US11857434B2 (en) | 2013-03-14 | 2024-01-02 | X-Spine Systems, Inc. | Spinal implant and assembly |
USD745159S1 (en) | 2013-10-10 | 2015-12-08 | Nuvasive, Inc. | Intervertebral implant |
USD794796S1 (en) | 2013-10-10 | 2017-08-15 | Nuvasive, Inc. | Intervertebral implant |
USD767137S1 (en) | 2013-10-10 | 2016-09-20 | Nuvasive, Inc. | Intervertebral implant |
US9439773B2 (en) | 2014-05-07 | 2016-09-13 | Perumala Corporation | Enhanced artificial disk |
US9198768B1 (en) * | 2014-05-07 | 2015-12-01 | Perumala Corporation | Enhanced artificial disk |
USD858769S1 (en) | 2014-11-20 | 2019-09-03 | Nuvasive, Inc. | Intervertebral implant |
US10758374B2 (en) | 2015-03-31 | 2020-09-01 | Cartiva, Inc. | Carpometacarpal (CMC) implants and methods |
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US11717411B2 (en) | 2015-03-31 | 2023-08-08 | Cartiva, Inc. | Hydrogel implants with porous materials and methods |
US11839552B2 (en) | 2015-03-31 | 2023-12-12 | Cartiva, Inc. | Carpometacarpal (CMC) implants and methods |
US9907663B2 (en) | 2015-03-31 | 2018-03-06 | Cartiva, Inc. | Hydrogel implants with porous materials and methods |
US10952858B2 (en) | 2015-04-14 | 2021-03-23 | Cartiva, Inc. | Tooling for creating tapered opening in tissue and related methods |
US11020231B2 (en) | 2015-04-14 | 2021-06-01 | Cartiva, Inc. | Tooling for creating tapered opening in tissue and related methods |
US11701231B2 (en) | 2015-04-14 | 2023-07-18 | Cartiva, Inc. | Tooling for creating tapered opening in tissue and related methods |
Also Published As
Publication number | Publication date |
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WO2007016673A3 (en) | 2007-06-21 |
US20070043441A1 (en) | 2007-02-22 |
WO2007016673A2 (en) | 2007-02-08 |
US8480742B2 (en) | 2013-07-09 |
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