CA2237307C - Clamping connector for spinal fixation systems - Google Patents
Clamping connector for spinal fixation systems Download PDFInfo
- Publication number
- CA2237307C CA2237307C CA002237307A CA2237307A CA2237307C CA 2237307 C CA2237307 C CA 2237307C CA 002237307 A CA002237307 A CA 002237307A CA 2237307 A CA2237307 A CA 2237307A CA 2237307 C CA2237307 C CA 2237307C
- Authority
- CA
- Canada
- Prior art keywords
- bone fastener
- recited
- connector
- leg
- fixation system
- 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.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7041—Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks
Abstract
The present invention relates to a connector for connecting a bone fastener to an elongated spinal rod. The connector includes a body portion having a longitudinal bore extending therethrough to receive an elongated spinal rod. Also included is a compressible leg portion extending from the body portion along an axis extending perpendicular to the longitudinal bore, the leg portion being dimensioned and configured to mount a bone fastener and facilitate relative rotation of the fastener and the leg portion about a longitudinal axis thereof.
Description
APPLICATION FOR PATENT
INVENTOR CHIH-I LIN
DAVID NICHOLS
TITLE: CLAMPING CONNECTOR FOR SPINAL FIXATION SYSTEMS
SPECIFICATION
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to spinal fixation systems for use in the treatment of spinal deformities and more particularly to a damping connector for attaching angularly misaligned pedide screws to transverse spinal rods in spinal fixation systems.
INVENTOR CHIH-I LIN
DAVID NICHOLS
TITLE: CLAMPING CONNECTOR FOR SPINAL FIXATION SYSTEMS
SPECIFICATION
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to spinal fixation systems for use in the treatment of spinal deformities and more particularly to a damping connector for attaching angularly misaligned pedide screws to transverse spinal rods in spinal fixation systems.
2. Description of the Prior Art Surgeons treat spinal disorders with spinal fusion augmented with longitudinal spinal rods connected to the spine with lamina hooks or pedicle screws. Such "rod assemblies" generally comprise one or two spinal rods and a plurality of 'screws inserted through the pedicles and into their respective , vertebral bodies. The screws are provided with coupling elements, for coupling the elongate rod to the screws. The rods extends along the longitudinal axis of the spine, coupling to the plurality of screws via their coupling elements.
The aligning influence of the rod forces the spine to which it is affixed, to conform to a more proper shape.
Due to anatomical variations, pedide screws may not properly align with the longitudinal spinal rods. In order to eliminate the need for lateral rod bending, a device is required to connect the rod to the screws in such a way as to compensate for lateral deviation of the spinal rods.
~
The art contains a variety of attempts at providing instrumentation that pectnits a range fteedom with respect to angulation of the screw and the coupling element. These teachings, however, have generally been complex, and unreliable with respect to durability. The considerable drawbacks associated with the prior art systems indude complexity, difficulty properly positioning the rod and the coupling elements, and the tedious manipulation of many small parts associated with the complex spinal fixation devices.
Various connector designs exists to accommodate screws offset from the rod, these indude the Smith &Nephew Rogozinski (U.S. patent 5,102,412) and Finn Systems (U.S. patent 5,474,551), the Synthes Universal System, and the ~Zimmer Modulok System (now the*Wrightlok System froni Wright Medical).
Each of these systems require two locking mechanisms for the connector - one to link the pedide screw to the connector and another to link the connector to the rod. Some of these devices provide variable lateral adjustment while other provide only a fixed distance of offset. The Sofmor DaneIcTSRH System (U.S.
patent 5,282,801) provides a means to offset a screw from the rod with a single set screw yet the lateral distances are fixed.
Other types of saews, hooks and damps have been used for attaching corrective spinal instrumentation to selected portions of the patient's spine.
Examples of pedide screws and other types of attachments are shown in U.S.
patent Nos. 5,562,662, 5,498,262, 5,312,404, 5,209,752 and 5,002,542.
However, many current bolt to rod connectors constrain the bolt or screw to a predetermined angle in relation to the connector when the assembly is tightened.
Tightening the bolt or serew to the connector forces the bolt or screw into a position perpendicular to the connector, creating stresses on the connector and on the bone as the bolt or screw is forced into the perpendicular position.
When spinal rod system are implanted in the sacral region of the spine, the bone sezcws need to allow for the variability in angulation found between the sacral and lumbar vertebrae. The bone sczews also need to be able to pivot in the *Trade-mark medial/lateral plane as well as have the ability to pivot and lock in the cephalad/caudal plane while maintaining the proper alignment between an implanted bone screw, a coupler and a rod of a spinal fixation system.
Accordingly, it is a feature of one embodiment of the present invention to provide a spinal rod linkage apparatus for connecting two or more vertebral bodies in a lateral direction whereby healing of a bone graft between the vertebral bodies is enhanced.
It is another feature of the present invention to provide a connector that in preferred embodiments, compensates for angular misalignment, in the transverse plane between both the implanted bolt or screw and the spinal rod, and the bolt or screw and the connector in order to reduce stress on the bolt or screw when it is firmly fastened to the connector.
It is a further feature of the present invention to provide a connector that in preferred embodiments, allows for attachment to both the spinal rod and the implanted bone screw with only one locking mechanism.
It is another feature of the present invention to provide a connector that in preferred embodiments provides for variable lateral distances between the spinal rod and the implanted pedicle screw.
The aligning influence of the rod forces the spine to which it is affixed, to conform to a more proper shape.
Due to anatomical variations, pedide screws may not properly align with the longitudinal spinal rods. In order to eliminate the need for lateral rod bending, a device is required to connect the rod to the screws in such a way as to compensate for lateral deviation of the spinal rods.
~
The art contains a variety of attempts at providing instrumentation that pectnits a range fteedom with respect to angulation of the screw and the coupling element. These teachings, however, have generally been complex, and unreliable with respect to durability. The considerable drawbacks associated with the prior art systems indude complexity, difficulty properly positioning the rod and the coupling elements, and the tedious manipulation of many small parts associated with the complex spinal fixation devices.
Various connector designs exists to accommodate screws offset from the rod, these indude the Smith &Nephew Rogozinski (U.S. patent 5,102,412) and Finn Systems (U.S. patent 5,474,551), the Synthes Universal System, and the ~Zimmer Modulok System (now the*Wrightlok System froni Wright Medical).
Each of these systems require two locking mechanisms for the connector - one to link the pedide screw to the connector and another to link the connector to the rod. Some of these devices provide variable lateral adjustment while other provide only a fixed distance of offset. The Sofmor DaneIcTSRH System (U.S.
patent 5,282,801) provides a means to offset a screw from the rod with a single set screw yet the lateral distances are fixed.
Other types of saews, hooks and damps have been used for attaching corrective spinal instrumentation to selected portions of the patient's spine.
Examples of pedide screws and other types of attachments are shown in U.S.
patent Nos. 5,562,662, 5,498,262, 5,312,404, 5,209,752 and 5,002,542.
However, many current bolt to rod connectors constrain the bolt or screw to a predetermined angle in relation to the connector when the assembly is tightened.
Tightening the bolt or serew to the connector forces the bolt or screw into a position perpendicular to the connector, creating stresses on the connector and on the bone as the bolt or screw is forced into the perpendicular position.
When spinal rod system are implanted in the sacral region of the spine, the bone sezcws need to allow for the variability in angulation found between the sacral and lumbar vertebrae. The bone sczews also need to be able to pivot in the *Trade-mark medial/lateral plane as well as have the ability to pivot and lock in the cephalad/caudal plane while maintaining the proper alignment between an implanted bone screw, a coupler and a rod of a spinal fixation system.
Accordingly, it is a feature of one embodiment of the present invention to provide a spinal rod linkage apparatus for connecting two or more vertebral bodies in a lateral direction whereby healing of a bone graft between the vertebral bodies is enhanced.
It is another feature of the present invention to provide a connector that in preferred embodiments, compensates for angular misalignment, in the transverse plane between both the implanted bolt or screw and the spinal rod, and the bolt or screw and the connector in order to reduce stress on the bolt or screw when it is firmly fastened to the connector.
It is a further feature of the present invention to provide a connector that in preferred embodiments, allows for attachment to both the spinal rod and the implanted bone screw with only one locking mechanism.
It is another feature of the present invention to provide a connector that in preferred embodiments provides for variable lateral distances between the spinal rod and the implanted pedicle screw.
SUMMARY OF THE INVENTION
In accordance with one embodiment of the present invention there is provided a spinal fixation system comprising: an elongated spinal rod; a bone fastener having a top portion defining a transverse bore and an elongated threaded shaft portion depending from the top portion; a connector having a body portion with a longitudinal bore extending therethrough to receive the elongated spinal rod, and a compressible leg portion extending from the body portion along an axis extending perpendicular to the longitudinal bore, the leg portion configured to extend through the transverse bore in the top portion of the bone fastener and having a cylindrical cross-section to facilitate relative rotation of the bone fastener and the leg portion about the perpendicular axis thereof; and a locking member configured to engage the transverse bore and compress the leg portion so as to fix the position of the bone fastener with respect to the leg portion.
In accordance with another embodiment of the present invention there is provided a spinal fixation system comprising: a connector including a first portion having a first opening configured to slidably and rotatably receive an elongated spinal rod, and a second portion extending from the first portion and configured to mount a bone fastener; and a single locking member slidably mounted in the connector and configured to both fix the position of the first portion relative to the spinal rod upon sliding movement within the connector and fix the position of the bone fastener relative to the second portion, the locking member is movable in a direction within the connector which is at an angle to a longitudinal axis of the bone fastener.
Yet another embodiment of the present invention provides a bone fastener in combination with a connector for securement of the bone fastener at a location offset from the axis of an elongated spinal rod comprising: a) a connector having a first section configured to receive a spinal rod and having a second section defined by an elongated member extending perpendicular to the first section and having a longitudinal axis extending therethrough; and b) a bone fastener including: i) a first portion having a transverse bore extending therethrough to receive the elongated member extending transversely from the spinal rod; ii) a second portion depending from the first portion of the bone fastener and configured to secure the bone fastener to bone; and iii) locking member configured to engage the transverse bore of the first portion along the longitudinal axis of the elongated member and fix the position of the bone fastener with respect to the elongated member at a location offset from the axis of the spinal rod.
BRIEF DESCRIPTION OF THE DRAWINGS
A better understanding of the invention can be obtained when the detailed description of exemplary embodiments set 4a forth below is reviewed in conjunction with the accompanying drawings, in which:
FIGURE 1 is a schematic view of a human spine with an implanted spinal fixation system using the connectors of the present invention;
FIGURE 2 is a perspective view of a section of a spinal fixation system illustrating the connector of the present invention attaching a pedicle screw to a spinal rod;
FIGURE 3 is a top plane view of the assembly of Fig. 2;
FIGURE 4 is a perspective view of one embodiment of the present invention;
FIGURE 5 is a perspective view of another embodiment of the present invention;
FIGURE 6A is a cross-sectional view of the present invention of Fig. 4 taken along lines 6-6 showing the inner surface of the bore;
FIGURE 6B is a cross-sectional view of the subject invention of Fig. 4 taken along lines 6-6 showing the bore tapering in a first direction;
4b FIGURE 6C is a cross-sectional view of the present invention of Fig. 4 taken along lines 6-6 showing the inside surface of the bore tapering in a second direction;
FIGURE 7 is a perspective view of the first end of the invention of Fig. 4;
FIGURE 8 is a perspective of an alteinative embodiment of the present invention;
FIGURE 9 is a perspective view of a second alternative embodiment of the present invention;
FIGURE 10 is a perspective view of a portion of the pedicle screw of Fig.
2 showing a locking mechanism for connecting the present invention to the implanted pedicle screw;
FIGURE 11 is a plane view of the present invention of Fig. 2 illustrating a first range of rotation; and FIGLTRE 12 is a side plane view of the present invention of Fig. 2 illustrating a second range of rotation.
DETAILED DESCRII'TION OF INVENTION
The present invention is directed to a one piece connector 10 that is used in spinal fixation systems such as the one shown in Fig. 1. Spinal fixation systems typically indude spinal rods 12 and pedicle screws 42 or bone bolts (not shown). The one piece connector 10 includes a body portion 14 and a leg portion 16 (Figs. 4 and 7). Body portion 14, in a preferred embodiment is generally cylindrical in shape with a longitudinal through bore 18 that has a longitudinal axis LA1-LAl, as shown in Fig. 5. However, body portion 14 can also have other shapes, such as for example, a spherical, oval or cubic shape.
Bore 18 has a first end 20 and a second end 22 and an inside diameter D 1-D 1 (Fig. 6A) that in one embodiment is a constant dimension along the longitudinal axis I.A1-I.A1 from first end 20 to second end 22. Alternatively bore 18 can taper from a smaller inside diameter at first end 20 to a larger inside diameter D2-D2 at end 22 as shown in Fig. 6B or conversely bore 18 can taper from a larger diameter at end 20 to a smaller inside diameter D3-D3 at second end 22 as illustrated in Fig. 6C. However, in all embodiments, the inside diameter of bore 18 will be greater than an outside diameter of an appropriately sized spinal rod that is part of a spinal fixation system.
Leg portion 16 is generally a solid cylinder with a first end 24 and a second end 26 with the second end 26 intersecting the body portion 14 at a 90 angle (Fig. 7). Leg portion's 16 outer surface can be either smooth or textured.
Leg portion 16 has a longitudinal axis LA2-LA2 (Fig. 5) and a transverse axis TA-TA (Fig. 7). Thus, longitudinal axis LA1-LA1 of bore 18 is positioned perpendicular to the longitudinal axis LA2-LA2 of leg portion 16. Leg portion 16 is split in two portions with a narrow slot 28, that is positioned along a transverse axis TA-TA and runs parallel to the longitudinal axis LA2-LA2 of leg portion 16 (Figs. 4 and 7). Slot 28 includes a first end 30 and a second end with first end 30 intersecting bore 18 of body portion 14 perpendicular to the longitudinal axis LA1-LA1 of bore 18, at the second end 26 of leg portion 16.
Slot 28 has a constant width from first end 30 to second end 32 with the width being greater than the difference between the inside diameter of bore 18 and an outside diameter of a selected spinal rod 12. The width of slot 28 creates a clamping force on spinal rod 12 when the one piece connector 10 is placed over spinal rod 12 and connected to an implanted pedide screw 42. Alternatively, the width of slot 28 can taper from a smaller width at first end 30 to a larger width at second end 32 or conversely from a larger width at first end 30 to a smaller width at second end 32. This tapering of the width of slot 28 increases the clamping force of the one piece connector 10 on spinal rod 12 when pedide screw 42 is connected to the one piece connector 10 at variable points along the longitudinal axis LA2-LA2 of the leg portion 16. In one embodiment, second end 32 of slot 28 of the one piece connector 10 extends to and creates an opening in the first end 24 of leg portion 16 (Figs. 4 and 7). In a second embodiment, as shown in Fig. 5, second end 32 of slot 28 stops short of the first end 24 of leg portion 16 so as to create a solid portion at the first end 24 of leg portion 16.
Altematively, leg portion 16 of the one piece connector can taper from a larger outside diameter at second end 26 to a smaller outside diameter at first -end 24 (Fig. 8) or conversely from a larger outside diameter at first end 24 to a smaller outside diameter at second end 26 of leg portion 16 (Fig. 9). The tapering of leg portion 16 also increases the clamping force of the one piece connector 10 on the longitudinal spinal rod 12 when pedicle screw 42 is connected to the one piecc connector 10 at variable points along the longitudinal axis LA2-LA2 of the leg portion 16.
As an example only, one size of the one piece connector 10 can have a leg portion 16 with a length of approximately 0.49 inches and a diameter of approximately 0.2 inches, and a body portion 14 with an outside diameter of approximately 0.3 inches and a bore 18 with a diameter of approximately 0.2 inches.
The inside diameter of bore 18 of body portion 14 allows the one piece connector 10 to slide along the longitudinal spinal rod (line L-L in Fig. 3) in order to correctly position the one piece connector in relation to the implanted pedicle screw 42. The inside diameter of bore 18 of body portion 14 also allows for a 360 rotation of the one piece connector 10 around the spinal rod 12 (line T1-T1 in Fig. 11). This rotation allows for any transverse angular misalignment between the implanted pedicle screw 42 and the spinal rod 12 when the one piece connector is secured in place. The ability of the one piece connector to compensate for this angular misalignment reduces stress on the pedicle screw and reduces lateral bending of the spinal rod 12 when the pedicle screw 42 is firmly fastened to the one piece connector 10 and the connector 10 is firmly clamped to spinal rod 12. Additionally, when the one piece connector 10 is attached to the pedide screw 42, the generally circular shape of leg portion allows the pedide screw 42 to rotate 360 around leg portion 16 prior to being mechanically locked to the one piece connector 10 (line T2-T2 in Fig. 12).
This rotation allows for any transverse angular misalignment between the one piece connector 10 and the implanted pedide screw 42 when the one piece connector is secured in place. The ability of the one piece connector 10 to compensate for this angular misalignment also reduces stress on the pedide screw 42 and reduces lateral bending of the spinal rod 12 when the pedicle screw 42 is firmly fastened to the one piece connector 10 and the connector 10 is firmly clamped to spinal rod 12.
The one piece connector 10 also allows the pedicle screw 42 to be offset at variable lateral distances from the spinal rod 12, as shown by line V-V in Fig.
3. The pedicle screw 42 can be locked to the one piece connector 10 at various selected points between the first and second ends 24, 26 of leg portion 16 of the one piece connector 10.
An inventive feature of the one piece connector 10 is its ability to be locked in place on both the longitudinal spinal rod 12 and the implanted pedicle screw 42 with a single locking mechanism on the pedicle screw 42. When used in a spinal fixation system, body portion 14 clamps around spinal rod 12.
Pedicle screw 42 typically includes a U-shaped opening, a through bore or some other opening shaped to accommodate the one piece connector 10. Pedicle screw 42 including some form of a locking mechanism for loclcing the one piece connector 10 or other cylindrical member into the pedicle screw 42. Typical locking mechanisms found on pedicle screws or bone bolts include various kinds of tops or caps that include set screws or taper locking caps or a locking nut for use with bone bolts. These various locldng mechanisms are known to one skilled in the art.
An example of a pedicle screw that can be used with the one piece } connector is illustrated in Figs. 2 and 10. Pedicle screw 42 has a shaft portion 44 and a top portion 46 that includes a U-shaped opening 48 configured to 8 ol receive the one piece connector 10. A locking cap 50 is inserted into the U-shaped opening 48 in order to damp the one piece connector 10 into the pedide screw 42. When the one piece connectors 10 are used in a spinal fixation system, the spinal rod 12 is placed through bore 18 of the body portion 14 of each connector and the connectors 10 are positioned along the spinal rod 12 in proper alignment with the implanted pedide screws 42. The one piece connector is angularly adjusted in order to compensate for the pedide screws 42 that are misaligned in relation to the spinal rod 12. Head 46 of the pedide screw 42 is positioned so that the U-shaped opening 48 is perpendicular to the longitudinal 10 spinal rod 12. Leg portion 16 of the one piece connector 10 is placed through the U-shaped opening 48 and locking cap 50 is inserted into the U-shaped opening 48 in order to clamp the one piece connector 10 into the pedide screw 42. As locking cap 50 is locked into place, it compresses the leg portion 16, which causes slot 28 to be compressed which causes body portion 14 of the one piece connector 10 to damp around the spinal rod 12.
The one piece connector 10, thus provides a secure link between the spinal rod 12 and the implanted pedicle screw 42 with a single connector and a single locking mechanism. The one piece connector 10 allows the pedicle screw 42 to be clamped to the one piece connector at various angles and the one piece connector 10 to be damped to the spinal rod 12 at various angles.
The foregoing disclosure and description of the invention are illustrative and explanatory thereof, and various changes in the details of the illustrated apparatus and construction and method of operation may be made without departing from the spirit of the invention.
In accordance with one embodiment of the present invention there is provided a spinal fixation system comprising: an elongated spinal rod; a bone fastener having a top portion defining a transverse bore and an elongated threaded shaft portion depending from the top portion; a connector having a body portion with a longitudinal bore extending therethrough to receive the elongated spinal rod, and a compressible leg portion extending from the body portion along an axis extending perpendicular to the longitudinal bore, the leg portion configured to extend through the transverse bore in the top portion of the bone fastener and having a cylindrical cross-section to facilitate relative rotation of the bone fastener and the leg portion about the perpendicular axis thereof; and a locking member configured to engage the transverse bore and compress the leg portion so as to fix the position of the bone fastener with respect to the leg portion.
In accordance with another embodiment of the present invention there is provided a spinal fixation system comprising: a connector including a first portion having a first opening configured to slidably and rotatably receive an elongated spinal rod, and a second portion extending from the first portion and configured to mount a bone fastener; and a single locking member slidably mounted in the connector and configured to both fix the position of the first portion relative to the spinal rod upon sliding movement within the connector and fix the position of the bone fastener relative to the second portion, the locking member is movable in a direction within the connector which is at an angle to a longitudinal axis of the bone fastener.
Yet another embodiment of the present invention provides a bone fastener in combination with a connector for securement of the bone fastener at a location offset from the axis of an elongated spinal rod comprising: a) a connector having a first section configured to receive a spinal rod and having a second section defined by an elongated member extending perpendicular to the first section and having a longitudinal axis extending therethrough; and b) a bone fastener including: i) a first portion having a transverse bore extending therethrough to receive the elongated member extending transversely from the spinal rod; ii) a second portion depending from the first portion of the bone fastener and configured to secure the bone fastener to bone; and iii) locking member configured to engage the transverse bore of the first portion along the longitudinal axis of the elongated member and fix the position of the bone fastener with respect to the elongated member at a location offset from the axis of the spinal rod.
BRIEF DESCRIPTION OF THE DRAWINGS
A better understanding of the invention can be obtained when the detailed description of exemplary embodiments set 4a forth below is reviewed in conjunction with the accompanying drawings, in which:
FIGURE 1 is a schematic view of a human spine with an implanted spinal fixation system using the connectors of the present invention;
FIGURE 2 is a perspective view of a section of a spinal fixation system illustrating the connector of the present invention attaching a pedicle screw to a spinal rod;
FIGURE 3 is a top plane view of the assembly of Fig. 2;
FIGURE 4 is a perspective view of one embodiment of the present invention;
FIGURE 5 is a perspective view of another embodiment of the present invention;
FIGURE 6A is a cross-sectional view of the present invention of Fig. 4 taken along lines 6-6 showing the inner surface of the bore;
FIGURE 6B is a cross-sectional view of the subject invention of Fig. 4 taken along lines 6-6 showing the bore tapering in a first direction;
4b FIGURE 6C is a cross-sectional view of the present invention of Fig. 4 taken along lines 6-6 showing the inside surface of the bore tapering in a second direction;
FIGURE 7 is a perspective view of the first end of the invention of Fig. 4;
FIGURE 8 is a perspective of an alteinative embodiment of the present invention;
FIGURE 9 is a perspective view of a second alternative embodiment of the present invention;
FIGURE 10 is a perspective view of a portion of the pedicle screw of Fig.
2 showing a locking mechanism for connecting the present invention to the implanted pedicle screw;
FIGURE 11 is a plane view of the present invention of Fig. 2 illustrating a first range of rotation; and FIGLTRE 12 is a side plane view of the present invention of Fig. 2 illustrating a second range of rotation.
DETAILED DESCRII'TION OF INVENTION
The present invention is directed to a one piece connector 10 that is used in spinal fixation systems such as the one shown in Fig. 1. Spinal fixation systems typically indude spinal rods 12 and pedicle screws 42 or bone bolts (not shown). The one piece connector 10 includes a body portion 14 and a leg portion 16 (Figs. 4 and 7). Body portion 14, in a preferred embodiment is generally cylindrical in shape with a longitudinal through bore 18 that has a longitudinal axis LA1-LAl, as shown in Fig. 5. However, body portion 14 can also have other shapes, such as for example, a spherical, oval or cubic shape.
Bore 18 has a first end 20 and a second end 22 and an inside diameter D 1-D 1 (Fig. 6A) that in one embodiment is a constant dimension along the longitudinal axis I.A1-I.A1 from first end 20 to second end 22. Alternatively bore 18 can taper from a smaller inside diameter at first end 20 to a larger inside diameter D2-D2 at end 22 as shown in Fig. 6B or conversely bore 18 can taper from a larger diameter at end 20 to a smaller inside diameter D3-D3 at second end 22 as illustrated in Fig. 6C. However, in all embodiments, the inside diameter of bore 18 will be greater than an outside diameter of an appropriately sized spinal rod that is part of a spinal fixation system.
Leg portion 16 is generally a solid cylinder with a first end 24 and a second end 26 with the second end 26 intersecting the body portion 14 at a 90 angle (Fig. 7). Leg portion's 16 outer surface can be either smooth or textured.
Leg portion 16 has a longitudinal axis LA2-LA2 (Fig. 5) and a transverse axis TA-TA (Fig. 7). Thus, longitudinal axis LA1-LA1 of bore 18 is positioned perpendicular to the longitudinal axis LA2-LA2 of leg portion 16. Leg portion 16 is split in two portions with a narrow slot 28, that is positioned along a transverse axis TA-TA and runs parallel to the longitudinal axis LA2-LA2 of leg portion 16 (Figs. 4 and 7). Slot 28 includes a first end 30 and a second end with first end 30 intersecting bore 18 of body portion 14 perpendicular to the longitudinal axis LA1-LA1 of bore 18, at the second end 26 of leg portion 16.
Slot 28 has a constant width from first end 30 to second end 32 with the width being greater than the difference between the inside diameter of bore 18 and an outside diameter of a selected spinal rod 12. The width of slot 28 creates a clamping force on spinal rod 12 when the one piece connector 10 is placed over spinal rod 12 and connected to an implanted pedide screw 42. Alternatively, the width of slot 28 can taper from a smaller width at first end 30 to a larger width at second end 32 or conversely from a larger width at first end 30 to a smaller width at second end 32. This tapering of the width of slot 28 increases the clamping force of the one piece connector 10 on spinal rod 12 when pedide screw 42 is connected to the one piece connector 10 at variable points along the longitudinal axis LA2-LA2 of the leg portion 16. In one embodiment, second end 32 of slot 28 of the one piece connector 10 extends to and creates an opening in the first end 24 of leg portion 16 (Figs. 4 and 7). In a second embodiment, as shown in Fig. 5, second end 32 of slot 28 stops short of the first end 24 of leg portion 16 so as to create a solid portion at the first end 24 of leg portion 16.
Altematively, leg portion 16 of the one piece connector can taper from a larger outside diameter at second end 26 to a smaller outside diameter at first -end 24 (Fig. 8) or conversely from a larger outside diameter at first end 24 to a smaller outside diameter at second end 26 of leg portion 16 (Fig. 9). The tapering of leg portion 16 also increases the clamping force of the one piece connector 10 on the longitudinal spinal rod 12 when pedicle screw 42 is connected to the one piecc connector 10 at variable points along the longitudinal axis LA2-LA2 of the leg portion 16.
As an example only, one size of the one piece connector 10 can have a leg portion 16 with a length of approximately 0.49 inches and a diameter of approximately 0.2 inches, and a body portion 14 with an outside diameter of approximately 0.3 inches and a bore 18 with a diameter of approximately 0.2 inches.
The inside diameter of bore 18 of body portion 14 allows the one piece connector 10 to slide along the longitudinal spinal rod (line L-L in Fig. 3) in order to correctly position the one piece connector in relation to the implanted pedicle screw 42. The inside diameter of bore 18 of body portion 14 also allows for a 360 rotation of the one piece connector 10 around the spinal rod 12 (line T1-T1 in Fig. 11). This rotation allows for any transverse angular misalignment between the implanted pedicle screw 42 and the spinal rod 12 when the one piece connector is secured in place. The ability of the one piece connector to compensate for this angular misalignment reduces stress on the pedicle screw and reduces lateral bending of the spinal rod 12 when the pedicle screw 42 is firmly fastened to the one piece connector 10 and the connector 10 is firmly clamped to spinal rod 12. Additionally, when the one piece connector 10 is attached to the pedide screw 42, the generally circular shape of leg portion allows the pedide screw 42 to rotate 360 around leg portion 16 prior to being mechanically locked to the one piece connector 10 (line T2-T2 in Fig. 12).
This rotation allows for any transverse angular misalignment between the one piece connector 10 and the implanted pedide screw 42 when the one piece connector is secured in place. The ability of the one piece connector 10 to compensate for this angular misalignment also reduces stress on the pedide screw 42 and reduces lateral bending of the spinal rod 12 when the pedicle screw 42 is firmly fastened to the one piece connector 10 and the connector 10 is firmly clamped to spinal rod 12.
The one piece connector 10 also allows the pedicle screw 42 to be offset at variable lateral distances from the spinal rod 12, as shown by line V-V in Fig.
3. The pedicle screw 42 can be locked to the one piece connector 10 at various selected points between the first and second ends 24, 26 of leg portion 16 of the one piece connector 10.
An inventive feature of the one piece connector 10 is its ability to be locked in place on both the longitudinal spinal rod 12 and the implanted pedicle screw 42 with a single locking mechanism on the pedicle screw 42. When used in a spinal fixation system, body portion 14 clamps around spinal rod 12.
Pedicle screw 42 typically includes a U-shaped opening, a through bore or some other opening shaped to accommodate the one piece connector 10. Pedicle screw 42 including some form of a locking mechanism for loclcing the one piece connector 10 or other cylindrical member into the pedicle screw 42. Typical locking mechanisms found on pedicle screws or bone bolts include various kinds of tops or caps that include set screws or taper locking caps or a locking nut for use with bone bolts. These various locldng mechanisms are known to one skilled in the art.
An example of a pedicle screw that can be used with the one piece } connector is illustrated in Figs. 2 and 10. Pedicle screw 42 has a shaft portion 44 and a top portion 46 that includes a U-shaped opening 48 configured to 8 ol receive the one piece connector 10. A locking cap 50 is inserted into the U-shaped opening 48 in order to damp the one piece connector 10 into the pedide screw 42. When the one piece connectors 10 are used in a spinal fixation system, the spinal rod 12 is placed through bore 18 of the body portion 14 of each connector and the connectors 10 are positioned along the spinal rod 12 in proper alignment with the implanted pedide screws 42. The one piece connector is angularly adjusted in order to compensate for the pedide screws 42 that are misaligned in relation to the spinal rod 12. Head 46 of the pedide screw 42 is positioned so that the U-shaped opening 48 is perpendicular to the longitudinal 10 spinal rod 12. Leg portion 16 of the one piece connector 10 is placed through the U-shaped opening 48 and locking cap 50 is inserted into the U-shaped opening 48 in order to clamp the one piece connector 10 into the pedide screw 42. As locking cap 50 is locked into place, it compresses the leg portion 16, which causes slot 28 to be compressed which causes body portion 14 of the one piece connector 10 to damp around the spinal rod 12.
The one piece connector 10, thus provides a secure link between the spinal rod 12 and the implanted pedicle screw 42 with a single connector and a single locking mechanism. The one piece connector 10 allows the pedicle screw 42 to be clamped to the one piece connector at various angles and the one piece connector 10 to be damped to the spinal rod 12 at various angles.
The foregoing disclosure and description of the invention are illustrative and explanatory thereof, and various changes in the details of the illustrated apparatus and construction and method of operation may be made without departing from the spirit of the invention.
Claims (20)
1. A spinal fixation system comprising:
an elongated spinal rod;
a bone fastener having a top portion defining a transverse bore and an elongated threaded shaft portion depending from the top portion;
a connector having a body portion with a longitudinal bore extending therethrough to receive the elongated spinal rod, and a compressible leg portion extending from the body portion along an axis extending perpendicular to the longitudinal bore, the leg portion configured to extend through the transverse bore in the top portion of the bone fastener and having a cylindrical cross-section to facilitate relative rotation of the bone fastener and the leg portion about the perpendicular axis thereof; and a locking member configured to engage the transverse bore and compress the leg portion so as to fix the position of the bone fastener with respect to the leg portion.
an elongated spinal rod;
a bone fastener having a top portion defining a transverse bore and an elongated threaded shaft portion depending from the top portion;
a connector having a body portion with a longitudinal bore extending therethrough to receive the elongated spinal rod, and a compressible leg portion extending from the body portion along an axis extending perpendicular to the longitudinal bore, the leg portion configured to extend through the transverse bore in the top portion of the bone fastener and having a cylindrical cross-section to facilitate relative rotation of the bone fastener and the leg portion about the perpendicular axis thereof; and a locking member configured to engage the transverse bore and compress the leg portion so as to fix the position of the bone fastener with respect to the leg portion.
2. The spinal fixation system as recited in claim 1, wherein the leg portion has a transverse slot intersecting the longitudinal bore in the body portion to define a pair of compressible leg members.
3. The spinal fixation system as recited in claim 2, wherein the transverse slot in the leg portion has a second end adjacent a distal end of the leg portion.
4. The spinal fixation system as recited in claim 2, wherein the transverse slot in the leg portion has a second end extending through a distal end of the leg portion.
5. The spinal fixation system as recited in claim 2, wherein the transverse bore in the top portion of the bone fastener is defined by a U-shaped opening having a pair of opposed side walls and a floor, each side wall having a tapered engagement slot formed therein, the floor having a hemi-cylindrical seat defined therein for accommodating a lower leg member of the leg portion.
6. The spinal fixation system as recited in claim 5, wherein the locking member includes a top portion and a bottom portion, the bottom portion having a pair of opposed tapered retention members for engaging the tapered engagement slots in the opposed side walls of the U-shaped opening, and a hemi-cylindrical recess in a bottom surface thereof for accommodating an upper leg member of the leg portion.
7. The spinal fixation system as recited in claim 6, wherein the top portion of the locking member includes a pair of supplemental retention members spaced from the opposed tapered retention members.
8. A spinal fixation system comprising:
a connector including a first portion having a first opening configured to slidably and rotatably receive an elongated spinal rod, and a compressible second portion extending from the first portion and configured to mount a bone fastener; and a single locking member slidably mounted in the connector configured to both fix the position of the first portion relative to the spinal rod upon sliding movement within the connector and fix the position of the bone fastener relative to the second portion, said locking member is movable in a direction within the connector which is at an angle to a longitudinal axis of the bone fastener.
a connector including a first portion having a first opening configured to slidably and rotatably receive an elongated spinal rod, and a compressible second portion extending from the first portion and configured to mount a bone fastener; and a single locking member slidably mounted in the connector configured to both fix the position of the first portion relative to the spinal rod upon sliding movement within the connector and fix the position of the bone fastener relative to the second portion, said locking member is movable in a direction within the connector which is at an angle to a longitudinal axis of the bone fastener.
9. The spinal fixation system as recited in claim 8, wherein the bone fastener has an opening defined therein for receiving the second portion of the connector.
10. The spinal fixation system as recited in claim 8, wherein the first portion defines body portion having a longitudinal bore extending therethrough and the second portion defines a cylindrical leg portion extending from the body portion.
11. The spinal fixation system as recited in claim 10, wherein the leg portion has a transverse slot intersecting the longitudinal bore in the body portion to define a pair of compressible leg members such that the locking member effectuates compression of the body portion about the spinal rod as well as compression of the leg portion relative to the bone fastener.
12. The spinal fixation system as recited in claim 11, wherein the first opening is defined by a U-shaped opening having a pair of opposed side walls and a floor, each side wall having a tapered engagement slot formed therein the floor having a hemi-cylindrical seat defined therein for accommodating a lower portion of the leg portion.
13. The spinal fixation system as recited in claim 12, wherein the locking member includes a top portion and a bottom portion, the bottom portion having a pair of opposed tapered retention members for engaging the tapered engagement slots in the opposed side walls of the U-shaped opening, and a hemi-cylindrical recess in a bottom surface thereof for accommodating an upper portion of the leg portion.
14. The spinal fixation system as recited in claim 13, wherein the top portion of the locking member includes a pair of supplemental retention members spaced from the opposed tapered retention members.
15. A bone fastener in combination with a connector for securement of the bone fastener at a location offset from the axis of an elongated spinal rod comprising:
a) the connector having a first section configured to receive a spinal rod and having a second section defined by an elongated member extending perpendicular to the first section and having a longitudinal axis extending therethrough; and b) the bone fastener including:
i) a first portion having a transverse bore extending therethrough to receive the elongated member extending transversely from the spinal rod;
ii) a second portion depending from the first portion to the bone fastener and configured to secure the bone fastener to the bone; and iii) a locking member configured to slidably move within the transverse bore of the first portion along the longitudinal axis of the elongated member, said sliding movement fixing the position of the bone fastener with respect to the elongated member at a location offset from the axis of the spinal rod.
a) the connector having a first section configured to receive a spinal rod and having a second section defined by an elongated member extending perpendicular to the first section and having a longitudinal axis extending therethrough; and b) the bone fastener including:
i) a first portion having a transverse bore extending therethrough to receive the elongated member extending transversely from the spinal rod;
ii) a second portion depending from the first portion to the bone fastener and configured to secure the bone fastener to the bone; and iii) a locking member configured to slidably move within the transverse bore of the first portion along the longitudinal axis of the elongated member, said sliding movement fixing the position of the bone fastener with respect to the elongated member at a location offset from the axis of the spinal rod.
16. The bone fastener as recited in claim 15, wherein the second portion includes bone threads.
17. The bone fastener as recited in claim 15, wherein the elongated member is cylindrical in configuration.
18. The bone fastener as recited in claim 17, wherein the transverse bore in the first portion of the bone fastener is defined by a U-shaped opening having a pair of opposed side walls and a floor, each side wall having a tapered engagement slot formed therein for slidably receiving the locking member, the floor having a hemi-cylindrical seat defined therein for accommodating a lower portion of the elongated member.
19. The bone fastener as recited in claim 18, wherein the locking member includes a top portion and a bottom portion, the bottom portion having a pair of opposed tapered retention members for engaging the tapered engagement slots in the opposed side walls of the U-shaped opening, and a hemi-cylindrical recess in a bottom surface thereof for accommodating an upper portion of the elongated member.
20. The bone fastener as recited in claim 18, wherein the top portion of the locking member includes a pair of supplemental retention members spaced from the opposed tapered retention members.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/857,137 US6413257B1 (en) | 1997-05-15 | 1997-05-15 | Clamping connector for spinal fixation systems |
| US08/857,137 | 1997-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2237307A1 CA2237307A1 (en) | 1998-11-15 |
| CA2237307C true CA2237307C (en) | 2007-06-26 |
Family
ID=25325276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002237307A Expired - Fee Related CA2237307C (en) | 1997-05-15 | 1998-05-11 | Clamping connector for spinal fixation systems |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US6413257B1 (en) |
| EP (1) | EP0878171B1 (en) |
| JP (1) | JPH1156871A (en) |
| AU (1) | AU747932B2 (en) |
| CA (1) | CA2237307C (en) |
| DE (1) | DE69816176T2 (en) |
Families Citing this family (199)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398787B1 (en) | 1998-02-18 | 2002-06-04 | Ai Medic Co., Ltd. | Cable sleeve system for bone fixation |
| WO2001050968A1 (en) * | 2000-01-13 | 2001-07-19 | Synthes Ag Chur | Device for detachably clamping a longitudinal carrier in a surgical implant |
| US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
| CN1247162C (en) * | 2000-08-24 | 2006-03-29 | 库尔斯恩蒂斯股份公司 | Device for connecting a bone fixation element to a longitudinal rod |
| US6755829B1 (en) | 2000-09-22 | 2004-06-29 | Depuy Acromed, Inc. | Lock cap anchor assembly for orthopaedic fixation |
| US8377100B2 (en) * | 2000-12-08 | 2013-02-19 | Roger P. Jackson | Closure for open-headed medical implant |
| US6726689B2 (en) * | 2002-09-06 | 2004-04-27 | Roger P. Jackson | Helical interlocking mating guide and advancement structure |
| US8353932B2 (en) | 2005-09-30 | 2013-01-15 | Jackson Roger P | Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member |
| US8292926B2 (en) | 2005-09-30 | 2012-10-23 | Jackson Roger P | Dynamic stabilization connecting member with elastic core and outer sleeve |
| US10729469B2 (en) | 2006-01-09 | 2020-08-04 | Roger P. Jackson | Flexible spinal stabilization assembly with spacer having off-axis core member |
| US10258382B2 (en) | 2007-01-18 | 2019-04-16 | Roger P. Jackson | Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord |
| US7862587B2 (en) | 2004-02-27 | 2011-01-04 | Jackson Roger P | Dynamic stabilization assemblies, tool set and method |
| WO2004017817A2 (en) * | 2002-08-23 | 2004-03-04 | Mcafee Paul C | Metal-backed uhmpe rod sleeve system preserving spinal motion |
| US8282673B2 (en) * | 2002-09-06 | 2012-10-09 | Jackson Roger P | Anti-splay medical implant closure with multi-surface removal aperture |
| US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
| US20060009773A1 (en) * | 2002-09-06 | 2006-01-12 | Jackson Roger P | Helical interlocking mating guide and advancement structure |
| US8523913B2 (en) | 2002-09-06 | 2013-09-03 | Roger P. Jackson | Helical guide and advancement flange with break-off extensions |
| US8257402B2 (en) * | 2002-09-06 | 2012-09-04 | Jackson Roger P | Closure for rod receiving orthopedic implant having left handed thread removal |
| WO2004084742A1 (en) | 2003-03-24 | 2004-10-07 | Theken Surgical Llc | Spinal implant adjustment device |
| US7621918B2 (en) | 2004-11-23 | 2009-11-24 | Jackson Roger P | Spinal fixation tool set and method |
| US6716214B1 (en) * | 2003-06-18 | 2004-04-06 | Roger P. Jackson | Polyaxial bone screw with spline capture connection |
| US8540753B2 (en) | 2003-04-09 | 2013-09-24 | Roger P. Jackson | Polyaxial bone screw with uploaded threaded shank and method of assembly and use |
| US7377923B2 (en) | 2003-05-22 | 2008-05-27 | Alphatec Spine, Inc. | Variable angle spinal screw assembly |
| US8398682B2 (en) | 2003-06-18 | 2013-03-19 | Roger P. Jackson | Polyaxial bone screw assembly |
| US7967850B2 (en) * | 2003-06-18 | 2011-06-28 | Jackson Roger P | Polyaxial bone anchor with helical capture connection, insert and dual locking assembly |
| US7776067B2 (en) | 2005-05-27 | 2010-08-17 | Jackson Roger P | Polyaxial bone screw with shank articulation pressure insert and method |
| US8092500B2 (en) | 2007-05-01 | 2012-01-10 | Jackson Roger P | Dynamic stabilization connecting member with floating core, compression spacer and over-mold |
| US8366753B2 (en) * | 2003-06-18 | 2013-02-05 | Jackson Roger P | Polyaxial bone screw assembly with fixed retaining structure |
| US8377102B2 (en) | 2003-06-18 | 2013-02-19 | Roger P. Jackson | Polyaxial bone anchor with spline capture connection and lower pressure insert |
| US8814911B2 (en) | 2003-06-18 | 2014-08-26 | Roger P. Jackson | Polyaxial bone screw with cam connection and lock and release insert |
| US8257398B2 (en) * | 2003-06-18 | 2012-09-04 | Jackson Roger P | Polyaxial bone screw with cam capture |
| US7766915B2 (en) | 2004-02-27 | 2010-08-03 | Jackson Roger P | Dynamic fixation assemblies with inner core and outer coil-like member |
| US8137386B2 (en) | 2003-08-28 | 2012-03-20 | Jackson Roger P | Polyaxial bone screw apparatus |
| US8936623B2 (en) | 2003-06-18 | 2015-01-20 | Roger P. Jackson | Polyaxial bone screw assembly |
| US20040260284A1 (en) * | 2003-06-23 | 2004-12-23 | Matthew Parker | Anti-splay pedicle screw |
| CN1819800B (en) * | 2003-08-08 | 2010-04-28 | 斯恩蒂斯有限公司 | Clamping device |
| US20050101953A1 (en) * | 2003-11-10 | 2005-05-12 | Simonson Peter M. | Artificial facet joint and method |
| US7083622B2 (en) * | 2003-11-10 | 2006-08-01 | Simonson Peter M | Artificial facet joint and method |
| US7708764B2 (en) | 2003-11-10 | 2010-05-04 | Simonson Peter M | Method for creating an artificial facet |
| US11419642B2 (en) | 2003-12-16 | 2022-08-23 | Medos International Sarl | Percutaneous access devices and bone anchor assemblies |
| US7179261B2 (en) | 2003-12-16 | 2007-02-20 | Depuy Spine, Inc. | Percutaneous access devices and bone anchor assemblies |
| US7527638B2 (en) | 2003-12-16 | 2009-05-05 | Depuy Spine, Inc. | Methods and devices for minimally invasive spinal fixation element placement |
| US7678137B2 (en) * | 2004-01-13 | 2010-03-16 | Life Spine, Inc. | Pedicle screw constructs for spine fixation systems |
| CA2555868C (en) | 2004-02-27 | 2011-09-06 | Roger P. Jackson | Orthopedic implant rod reduction tool set and method |
| US7160300B2 (en) | 2004-02-27 | 2007-01-09 | Jackson Roger P | Orthopedic implant rod reduction tool set and method |
| US8152810B2 (en) | 2004-11-23 | 2012-04-10 | Jackson Roger P | Spinal fixation tool set and method |
| US9050148B2 (en) | 2004-02-27 | 2015-06-09 | Roger P. Jackson | Spinal fixation tool attachment structure |
| US7717939B2 (en) | 2004-03-31 | 2010-05-18 | Depuy Spine, Inc. | Rod attachment for head to head cross connector |
| US7645294B2 (en) | 2004-03-31 | 2010-01-12 | Depuy Spine, Inc. | Head-to-head connector spinal fixation system |
| US7811311B2 (en) * | 2004-12-30 | 2010-10-12 | Warsaw Orthopedic, Inc. | Screw with deployable interlaced dual rods |
| US20050240181A1 (en) * | 2004-04-23 | 2005-10-27 | Boomer Mark C | Spinal implant connectors |
| US7572282B2 (en) * | 2004-04-23 | 2009-08-11 | Depuy Spine Sarl | Spinal fixation plates and plate extensions |
| US8021398B2 (en) | 2004-06-09 | 2011-09-20 | Life Spine, Inc. | Spinal fixation system |
| US7744635B2 (en) * | 2004-06-09 | 2010-06-29 | Spinal Generations, Llc | Spinal fixation system |
| US7938848B2 (en) * | 2004-06-09 | 2011-05-10 | Life Spine, Inc. | Spinal fixation system |
| US7854752B2 (en) | 2004-08-09 | 2010-12-21 | Theken Spine, Llc | System and method for dynamic skeletal stabilization |
| US7766945B2 (en) * | 2004-08-10 | 2010-08-03 | Lanx, Inc. | Screw and rod fixation system |
| US7186255B2 (en) * | 2004-08-12 | 2007-03-06 | Atlas Spine, Inc. | Polyaxial screw |
| US7717938B2 (en) | 2004-08-27 | 2010-05-18 | Depuy Spine, Inc. | Dual rod cross connectors and inserter tools |
| US7651502B2 (en) | 2004-09-24 | 2010-01-26 | Jackson Roger P | Spinal fixation tool set and method for rod reduction and fastener insertion |
| DE102004048938B4 (en) * | 2004-10-07 | 2015-04-02 | Synthes Gmbh | Device for the dynamic stabilization of vertebral bodies |
| US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
| DE102004056091B8 (en) | 2004-11-12 | 2007-04-26 | Aesculap Ag & Co. Kg | Orthopedic fixation device and orthopedic fixation system |
| US9168069B2 (en) | 2009-06-15 | 2015-10-27 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer |
| US8444681B2 (en) | 2009-06-15 | 2013-05-21 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert |
| US8308782B2 (en) | 2004-11-23 | 2012-11-13 | Jackson Roger P | Bone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation |
| US7875065B2 (en) * | 2004-11-23 | 2011-01-25 | Jackson Roger P | Polyaxial bone screw with multi-part shank retainer and pressure insert |
| US8556938B2 (en) | 2009-06-15 | 2013-10-15 | Roger P. Jackson | Polyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit |
| US9980753B2 (en) | 2009-06-15 | 2018-05-29 | Roger P Jackson | pivotal anchor with snap-in-place insert having rotation blocking extensions |
| US9216041B2 (en) | 2009-06-15 | 2015-12-22 | Roger P. Jackson | Spinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts |
| ATE524121T1 (en) | 2004-11-24 | 2011-09-15 | Abdou Samy | DEVICES FOR PLACING AN ORTHOPEDIC INTERVERTEBRAL IMPLANT |
| US7648508B2 (en) * | 2004-11-30 | 2010-01-19 | Stryker Trauma S.A. | Bone plating implants, instruments and methods |
| US7578833B2 (en) * | 2004-12-13 | 2009-08-25 | Dr. Robert S. Bray, Jr. | Bone fastener assembly for bone retention apparatus |
| US10076361B2 (en) | 2005-02-22 | 2018-09-18 | Roger P. Jackson | Polyaxial bone screw with spherical capture, compression and alignment and retention structures |
| US7901437B2 (en) | 2007-01-26 | 2011-03-08 | Jackson Roger P | Dynamic stabilization member with molded connection |
| US7338491B2 (en) * | 2005-03-22 | 2008-03-04 | Spinefrontier Inc | Spinal fixation locking mechanism |
| FR2884406B1 (en) | 2005-04-14 | 2008-10-17 | Memometal Technologies Soc Par | INTRAMEDULAR OSTEOSYNTHESIS DEVICE OF TWO BONE PARTS, IN PARTICULAR HAND AND / OR FOOT |
| US20090036929A1 (en) * | 2005-07-22 | 2009-02-05 | Joey Camia Reglos | Offset connector for a spinal stabilization rod |
| US20080243194A1 (en) * | 2005-09-26 | 2008-10-02 | The Regents Of The University Of California | Articulating instrumentation for dynamic spinal stabilization |
| US8105368B2 (en) | 2005-09-30 | 2012-01-31 | Jackson Roger P | Dynamic stabilization connecting member with slitted core and outer sleeve |
| US7704271B2 (en) | 2005-12-19 | 2010-04-27 | Abdou M Samy | Devices and methods for inter-vertebral orthopedic device placement |
| US8663287B2 (en) * | 2006-01-10 | 2014-03-04 | Life Spine, Inc. | Pedicle screw constructs and spinal rod attachment assemblies |
| US20070191842A1 (en) * | 2006-01-30 | 2007-08-16 | Sdgi Holdings, Inc. | Spinal fixation devices and methods of use |
| US20070233069A1 (en) * | 2006-02-27 | 2007-10-04 | Stewart Young | Implant/support member interconnection mechanism |
| US8025681B2 (en) | 2006-03-29 | 2011-09-27 | Theken Spine, Llc | Dynamic motion spinal stabilization system |
| US8172882B2 (en) | 2006-06-14 | 2012-05-08 | Spartek Medical, Inc. | Implant system and method to treat degenerative disorders of the spine |
| WO2008008458A2 (en) * | 2006-07-13 | 2008-01-17 | Mass Modular Spine System | Modular spinal fixation system |
| US8388660B1 (en) | 2006-08-01 | 2013-03-05 | Samy Abdou | Devices and methods for superior fixation of orthopedic devices onto the vertebral column |
| US20080065073A1 (en) * | 2006-09-08 | 2008-03-13 | Michael Perriello | Offset dynamic motion spinal stabilization system |
| US7976567B2 (en) * | 2006-10-18 | 2011-07-12 | Warsaw Orthopedic, Inc. | Orthopedic revision connector |
| US8361117B2 (en) | 2006-11-08 | 2013-01-29 | Depuy Spine, Inc. | Spinal cross connectors |
| CA2670988C (en) | 2006-12-08 | 2014-03-25 | Roger P. Jackson | Tool system for dynamic spinal implants |
| EP2117451A1 (en) * | 2006-12-29 | 2009-11-18 | Zimmer Spine Austin, Inc. | Spinal stabilization systems and methods |
| US8636783B2 (en) * | 2006-12-29 | 2014-01-28 | Zimmer Spine, Inc. | Spinal stabilization systems and methods |
| US8475498B2 (en) | 2007-01-18 | 2013-07-02 | Roger P. Jackson | Dynamic stabilization connecting member with cord connection |
| US8366745B2 (en) | 2007-05-01 | 2013-02-05 | Jackson Roger P | Dynamic stabilization assembly having pre-compressed spacers with differential displacements |
| WO2008098201A2 (en) * | 2007-02-09 | 2008-08-14 | Altiva Corporation | Surgical connector |
| US8012177B2 (en) | 2007-02-12 | 2011-09-06 | Jackson Roger P | Dynamic stabilization assembly with frusto-conical connection |
| FR2913876B1 (en) | 2007-03-20 | 2009-06-05 | Memometal Technologies Soc Par | OSTEOSYNTHESIS DEVICE |
| US10383660B2 (en) | 2007-05-01 | 2019-08-20 | Roger P. Jackson | Soft stabilization assemblies with pretensioned cords |
| US8197517B1 (en) | 2007-05-08 | 2012-06-12 | Theken Spine, Llc | Frictional polyaxial screw assembly |
| US8197518B2 (en) | 2007-05-16 | 2012-06-12 | Ortho Innovations, Llc | Thread-thru polyaxial pedicle screw system |
| US7942911B2 (en) | 2007-05-16 | 2011-05-17 | Ortho Innovations, Llc | Polyaxial bone screw |
| US7947065B2 (en) | 2008-11-14 | 2011-05-24 | Ortho Innovations, Llc | Locking polyaxial ball and socket fastener |
| US7951173B2 (en) * | 2007-05-16 | 2011-05-31 | Ortho Innovations, Llc | Pedicle screw implant system |
| US7942910B2 (en) | 2007-05-16 | 2011-05-17 | Ortho Innovations, Llc | Polyaxial bone screw |
| US7942909B2 (en) | 2009-08-13 | 2011-05-17 | Ortho Innovations, Llc | Thread-thru polyaxial pedicle screw system |
| AU2008263148C1 (en) | 2007-05-31 | 2012-05-24 | Roger P. Jackson | Dynamic stabilization connecting member with pre-tensioned solid core |
| US8114134B2 (en) | 2007-06-05 | 2012-02-14 | Spartek Medical, Inc. | Spinal prosthesis having a three bar linkage for motion preservation and dynamic stabilization of the spine |
| US8092501B2 (en) | 2007-06-05 | 2012-01-10 | Spartek Medical, Inc. | Dynamic spinal rod and method for dynamic stabilization of the spine |
| US7963978B2 (en) | 2007-06-05 | 2011-06-21 | Spartek Medical, Inc. | Method for implanting a deflection rod system and customizing the deflection rod system for a particular patient need for dynamic stabilization and motion preservation spinal implantation system |
| US8048122B2 (en) | 2007-06-05 | 2011-11-01 | Spartek Medical, Inc. | Spine implant with a dual deflection rod system including a deflection limiting sheild associated with a bone screw and method |
| US8083772B2 (en) | 2007-06-05 | 2011-12-27 | Spartek Medical, Inc. | Dynamic spinal rod assembly and method for dynamic stabilization of the spine |
| WO2008151096A1 (en) | 2007-06-05 | 2008-12-11 | Spartek Medical, Inc. | A deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method |
| US8048115B2 (en) | 2007-06-05 | 2011-11-01 | Spartek Medical, Inc. | Surgical tool and method for implantation of a dynamic bone anchor |
| US8002800B2 (en) | 2007-06-05 | 2011-08-23 | Spartek Medical, Inc. | Horizontal rod with a mounting platform for a dynamic stabilization and motion preservation spinal implantation system and method |
| US8021396B2 (en) | 2007-06-05 | 2011-09-20 | Spartek Medical, Inc. | Configurable dynamic spinal rod and method for dynamic stabilization of the spine |
| US8083777B2 (en) * | 2007-06-15 | 2011-12-27 | Robert Reid, Inc. | System and method for polyaxially adjustable bone anchorage |
| US20090076550A1 (en) * | 2007-09-18 | 2009-03-19 | Ortho Development Corporation | Spinal fixation system connectors |
| US8911477B2 (en) | 2007-10-23 | 2014-12-16 | Roger P. Jackson | Dynamic stabilization member with end plate support and cable core extension |
| US8333792B2 (en) | 2008-02-26 | 2012-12-18 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and method for dynamic stabilization of the spine |
| US8337536B2 (en) | 2008-02-26 | 2012-12-25 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post with a compliant ring and method for stabilization of the spine |
| US20100030224A1 (en) | 2008-02-26 | 2010-02-04 | Spartek Medical, Inc. | Surgical tool and method for connecting a dynamic bone anchor and dynamic vertical rod |
| US8267979B2 (en) | 2008-02-26 | 2012-09-18 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and axial spring and method for dynamic stabilization of the spine |
| US8211155B2 (en) | 2008-02-26 | 2012-07-03 | Spartek Medical, Inc. | Load-sharing bone anchor having a durable compliant member and method for dynamic stabilization of the spine |
| US8048125B2 (en) | 2008-02-26 | 2011-11-01 | Spartek Medical, Inc. | Versatile offset polyaxial connector and method for dynamic stabilization of the spine |
| US8097024B2 (en) | 2008-02-26 | 2012-01-17 | Spartek Medical, Inc. | Load-sharing bone anchor having a deflectable post and method for stabilization of the spine |
| US8083775B2 (en) | 2008-02-26 | 2011-12-27 | Spartek Medical, Inc. | Load-sharing bone anchor having a natural center of rotation and method for dynamic stabilization of the spine |
| US8057517B2 (en) | 2008-02-26 | 2011-11-15 | Spartek Medical, Inc. | Load-sharing component having a deflectable post and centering spring and method for dynamic stabilization of the spine |
| US9017384B2 (en) * | 2008-05-13 | 2015-04-28 | Stryker Spine | Composite spinal rod |
| CA2739997C (en) | 2008-08-01 | 2013-08-13 | Roger P. Jackson | Longitudinal connecting member with sleeved tensioned cords |
| US20100049252A1 (en) * | 2008-08-21 | 2010-02-25 | Southern Spine, Llc | Transverse Connector Device for Extending an Existing Spinal Fixation System |
| FR2935601B1 (en) * | 2008-09-09 | 2010-10-01 | Memometal Technologies | INTRAMEDULLARY IMPLANT RESORBABLE BETWEEN TWO BONE OR TWO BONE FRAGMENTS |
| ES2392362T3 (en) * | 2008-10-08 | 2012-12-10 | Biedermann Technologies Gmbh & Co. Kg | Bone anchoring device and stabilization device for bone parts or vertebrae |
| US8075603B2 (en) | 2008-11-14 | 2011-12-13 | Ortho Innovations, Llc | Locking polyaxial ball and socket fastener |
| US8998961B1 (en) | 2009-02-26 | 2015-04-07 | Lanx, Inc. | Spinal rod connector and methods |
| CN103917181A (en) | 2009-06-15 | 2014-07-09 | 罗杰.P.杰克逊 | Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock |
| US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
| US8998959B2 (en) | 2009-06-15 | 2015-04-07 | Roger P Jackson | Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert |
| US9668771B2 (en) | 2009-06-15 | 2017-06-06 | Roger P Jackson | Soft stabilization assemblies with off-set connector |
| EP2757988A4 (en) | 2009-06-15 | 2015-08-19 | Jackson Roger P | Polyaxial bone anchor with pop-on shank and winged insert with friction fit compressive collet |
| US20110009906A1 (en) * | 2009-07-13 | 2011-01-13 | Zimmer Spine, Inc. | Vertebral stabilization transition connector |
| US8795337B2 (en) * | 2009-10-30 | 2014-08-05 | Warsaw Orthopedic, Inc. | Apparatus for implementing a spinal fixation system with supplemental fixation |
| EP2506785A4 (en) | 2009-12-02 | 2014-10-15 | Spartek Medical Inc | Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod |
| US8764806B2 (en) | 2009-12-07 | 2014-07-01 | Samy Abdou | Devices and methods for minimally invasive spinal stabilization and instrumentation |
| US9498273B2 (en) | 2010-06-02 | 2016-11-22 | Wright Medical Technology, Inc. | Orthopedic implant kit |
| US8608785B2 (en) | 2010-06-02 | 2013-12-17 | Wright Medical Technology, Inc. | Hammer toe implant with expansion portion for retrograde approach |
| US9724140B2 (en) | 2010-06-02 | 2017-08-08 | Wright Medical Technology, Inc. | Tapered, cylindrical cruciform hammer toe implant and method |
| US20110307018A1 (en) | 2010-06-10 | 2011-12-15 | Spartek Medical, Inc. | Adaptive spinal rod and methods for stabilization of the spine |
| US10603083B1 (en) | 2010-07-09 | 2020-03-31 | Theken Spine, Llc | Apparatus and method for limiting a range of angular positions of a screw |
| US9084634B1 (en) | 2010-07-09 | 2015-07-21 | Theken Spine, Llc | Uniplanar screw |
| WO2012030712A1 (en) | 2010-08-30 | 2012-03-08 | Zimmer Spine, Inc. | Polyaxial pedicle screw |
| BR112013005465A2 (en) | 2010-09-08 | 2019-09-24 | P Jackson Roger | connecting element in a medical implant assembly having at least two bone attachment structures cooperating with a dynamic longitudinal connecting element |
| GB2502449A (en) | 2010-11-02 | 2013-11-27 | Roger P Jackson | Polyaxial bone anchor with pop-on shank and pivotable retainer |
| WO2012128825A1 (en) | 2011-03-24 | 2012-09-27 | Jackson Roger P | Polyaxial bone anchor with compound articulation and pop-on shank |
| US9005249B2 (en) | 2011-07-11 | 2015-04-14 | Life Spine, Inc. | Spinal rod connector assembly |
| US8845728B1 (en) | 2011-09-23 | 2014-09-30 | Samy Abdou | Spinal fixation devices and methods of use |
| US8911479B2 (en) | 2012-01-10 | 2014-12-16 | Roger P. Jackson | Multi-start closures for open implants |
| US8430916B1 (en) | 2012-02-07 | 2013-04-30 | Spartek Medical, Inc. | Spinal rod connectors, methods of use, and spinal prosthesis incorporating spinal rod connectors |
| US20130226240A1 (en) | 2012-02-22 | 2013-08-29 | Samy Abdou | Spinous process fixation devices and methods of use |
| US8992575B1 (en) | 2012-06-22 | 2015-03-31 | Seaspine, Inc. | Spinal implants having offsets and hooks |
| US8491640B1 (en) * | 2012-07-02 | 2013-07-23 | James C. Robinson | Bone screw coupling assembly |
| US9510863B2 (en) | 2012-07-02 | 2016-12-06 | Spectrum Spine Ip Holdings, Llc | Bone screw coupling assembly |
| US9295488B2 (en) | 2012-08-09 | 2016-03-29 | Wilson T. Asfora | Joint fusion |
| US9198767B2 (en) | 2012-08-28 | 2015-12-01 | Samy Abdou | Devices and methods for spinal stabilization and instrumentation |
| US9320617B2 (en) | 2012-10-22 | 2016-04-26 | Cogent Spine, LLC | Devices and methods for spinal stabilization and instrumentation |
| US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
| US8945232B2 (en) | 2012-12-31 | 2015-02-03 | Wright Medical Technology, Inc. | Ball and socket implants for correction of hammer toes and claw toes |
| US10058354B2 (en) | 2013-01-28 | 2018-08-28 | Roger P. Jackson | Pivotal bone anchor assembly with frictional shank head seating surfaces |
| US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
| US8973964B2 (en) | 2013-02-19 | 2015-03-10 | Precision Pet Products, Inc. | Connector for an animal fence |
| US9453526B2 (en) | 2013-04-30 | 2016-09-27 | Degen Medical, Inc. | Bottom-loading anchor assembly |
| CN112914515A (en) | 2013-06-25 | 2021-06-08 | 皇家飞利浦有限公司 | Measuring device and non-invasive treatment device for skin properties |
| US9724139B2 (en) | 2013-10-01 | 2017-08-08 | Wright Medical Technology, Inc. | Hammer toe implant and method |
| US9987047B2 (en) | 2013-10-07 | 2018-06-05 | Spine Wave, Inc. | Translating polyaxial screw |
| US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
| US9474561B2 (en) | 2013-11-19 | 2016-10-25 | Wright Medical Technology, Inc. | Two-wire technique for installing hammertoe implant |
| US9717533B2 (en) | 2013-12-12 | 2017-08-01 | Roger P. Jackson | Bone anchor closure pivot-splay control flange form guide and advancement structure |
| US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
| US9498266B2 (en) | 2014-02-12 | 2016-11-22 | Wright Medical Technology, Inc. | Intramedullary implant, system, and method for inserting an implant into a bone |
| US9545274B2 (en) | 2014-02-12 | 2017-01-17 | Wright Medical Technology, Inc. | Intramedullary implant, system, and method for inserting an implant into a bone |
| US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
| US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
| US9936672B2 (en) | 2014-07-22 | 2018-04-10 | Doskocil Manufacturing Company, Inc. | Latching mechanism for pet enclosure |
| WO2016028784A1 (en) * | 2014-08-19 | 2016-02-25 | Cronen Geoffrey | Circumferential vertebral column fixation system |
| WO2016043751A1 (en) | 2014-09-18 | 2016-03-24 | Wright Medical Technology, Inc. | Hammertoe implant and instrument |
| WO2016070191A1 (en) | 2014-11-01 | 2016-05-06 | Numagenesis, Llc (State Of North Carolina) | Compression fixation system |
| CN105960211B (en) | 2014-12-19 | 2019-01-11 | 瑞特医疗技术公司 | For anchor log in the marrow of interphalangeal arthrodesis of toe |
| US9757168B2 (en) | 2015-03-03 | 2017-09-12 | Howmedica Osteonics Corp. | Orthopedic implant and methods of implanting and removing same |
| US9763703B2 (en) | 2015-05-05 | 2017-09-19 | Degen Medical, Inc. | Cross connectors, kits, and methods |
| US10857003B1 (en) | 2015-10-14 | 2020-12-08 | Samy Abdou | Devices and methods for vertebral stabilization |
| US9822807B2 (en) | 2015-10-29 | 2017-11-21 | Doskocil Manufacturing Company, Inc. | Pet barrier fastener |
| EP3251621B1 (en) | 2016-06-03 | 2021-01-20 | Stryker European Holdings I, LLC | Intramedullary implant |
| US10973648B1 (en) | 2016-10-25 | 2021-04-13 | Samy Abdou | Devices and methods for vertebral bone realignment |
| US10744000B1 (en) | 2016-10-25 | 2020-08-18 | Samy Abdou | Devices and methods for vertebral bone realignment |
| US10507043B1 (en) | 2017-10-11 | 2019-12-17 | Seaspine Orthopedics Corporation | Collet for a polyaxial screw assembly |
| WO2019213560A1 (en) | 2018-05-04 | 2019-11-07 | Numagenesis, Llc (State Of North Carolina) | Compression fixation system |
| US11179248B2 (en) | 2018-10-02 | 2021-11-23 | Samy Abdou | Devices and methods for spinal implantation |
| CN117243676B (en) * | 2023-11-16 | 2024-01-12 | 山西谷枢医疗科技有限公司 | Bidirectional independent adjusting connecting rod mechanism for annular external fixing frame |
Family Cites Families (51)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4269178A (en) * | 1979-06-04 | 1981-05-26 | Keene James S | Hook assembly for engaging a spinal column |
| FR2545350B1 (en) * | 1983-05-04 | 1985-08-23 | Cotrel Yves | DEVICE FOR SHRINKAGE OF THE RACHIS |
| US5312406A (en) | 1986-12-30 | 1994-05-17 | Smith & Nephew Richards Inc. | Method of treating an intertrochanteric fracture |
| US4887596A (en) * | 1988-03-02 | 1989-12-19 | Synthes (U.S.A.) | Open backed pedicle screw |
| US5116334A (en) * | 1988-12-21 | 1992-05-26 | Zimmer, Inc. | Posterior spinal system and method |
| US5112332A (en) * | 1988-12-21 | 1992-05-12 | Zimmer, Inc. | Method of performing spinal surgery |
| US5074864A (en) * | 1988-12-21 | 1991-12-24 | Zimmer, Inc. | Clamp assembly for use in a spinal system |
| JPH0620466B2 (en) * | 1989-03-31 | 1994-03-23 | 有限会社田中医科器械製作所 | Spinal column correction device |
| US4987892A (en) * | 1989-04-04 | 1991-01-29 | Krag Martin H | Spinal fixation device |
| US5002542A (en) | 1989-10-30 | 1991-03-26 | Synthes U.S.A. | Pedicle screw clamp |
| US5344422A (en) * | 1989-10-30 | 1994-09-06 | Synthes (U.S.A.) | Pedicular screw clamp |
| CA2035348C (en) | 1990-02-08 | 2000-05-16 | Jean-Louis Vignaud | Adjustable fastening device with spinal osteosynthesis rods |
| US5102412A (en) * | 1990-06-19 | 1992-04-07 | Chaim Rogozinski | System for instrumentation of the spine in the treatment of spinal deformities |
| GB9014817D0 (en) | 1990-07-04 | 1990-08-22 | Mehdian Seyed M H | Improvements in or relating to apparatus for use in the treatment of spinal disorders |
| US5129900B1 (en) * | 1990-07-24 | 1998-12-29 | Acromed Corp | Spinal column retaining method and apparatus |
| CH681853A5 (en) | 1990-08-21 | 1993-06-15 | Synthes Ag | |
| US5122131A (en) * | 1991-03-14 | 1992-06-16 | Tsou Paul M | Orthopaedic device for mechanical coupling to a surgical rod |
| US5222954A (en) | 1991-06-21 | 1993-06-29 | Artifex, Ltd. | Spinal implant system and method for installing the implant |
| FR2680461B1 (en) | 1991-08-19 | 1993-11-26 | Fabrication Mat Orthopedique | IMPLANT FOR OSTEOSYNTHESIS DEVICE, ESPECIALLY OF THE RACHIS, AND CORRESPONDING DEVICE FOR ITS PLACEMENT. |
| US5257993A (en) * | 1991-10-04 | 1993-11-02 | Acromed Corporation | Top-entry rod retainer |
| FR2681776A1 (en) | 1991-09-30 | 1993-04-02 | Fixano Sa | VERTEBRAL OSTEOSYNTHESIS DEVICE. |
| US5282862A (en) | 1991-12-03 | 1994-02-01 | Artifex Ltd. | Spinal implant system and a method for installing the implant onto a vertebral column |
| US5254118A (en) | 1991-12-04 | 1993-10-19 | Srdjian Mirkovic | Three dimensional spine fixation system |
| US5209752A (en) | 1991-12-04 | 1993-05-11 | Danek Medical, Inc. | Lateral offset connector for spinal implant system |
| FR2686500B1 (en) | 1992-01-23 | 1998-11-27 | Euros Sa | PROSTHETIC ASSEMBLY, PARTICULARLY FOR LUMB-SACRED ARTICULATION. |
| EP0553424A1 (en) * | 1992-01-30 | 1993-08-04 | Acromed Corporation | Spinal column retaining apparatus |
| DE4202748A1 (en) | 1992-01-31 | 1993-08-05 | Kluger Patrick | SPINAL IMPLANT AND REPOSITION INSTRUMENTS |
| US5261909A (en) | 1992-02-18 | 1993-11-16 | Danek Medical, Inc. | Variable angle screw for spinal implant system |
| AU659912B2 (en) | 1992-03-10 | 1995-06-01 | Bristol-Myers Squibb Company | Perpendicular rod connector for spinal fixation device |
| US5281222A (en) * | 1992-06-30 | 1994-01-25 | Zimmer, Inc. | Spinal implant system |
| FR2697743B1 (en) * | 1992-11-09 | 1995-01-27 | Fabrication Mat Orthopedique S | Spinal osteosynthesis device applicable in particular to degenerative vertebrae. |
| FR2697992B1 (en) | 1992-11-18 | 1994-12-30 | Eurosurgical | Device for attaching to a rod of an organ, in particular for spinal orthopedic instrumentation. |
| US5498262A (en) | 1992-12-31 | 1996-03-12 | Bryan; Donald W. | Spinal fixation apparatus and method |
| US5527314A (en) | 1993-01-04 | 1996-06-18 | Danek Medical, Inc. | Spinal fixation system |
| US5282801A (en) * | 1993-02-17 | 1994-02-01 | Danek Medical, Inc. | Top tightening clamp assembly for a spinal fixation system |
| US5634925A (en) | 1993-02-19 | 1997-06-03 | Alphatec Manufacturing, Inc. | Apparatus and method for spinal fixation system |
| US5330473A (en) * | 1993-03-04 | 1994-07-19 | Advanced Spine Fixation Systems, Inc. | Branch connector for spinal fixation systems |
| US5380323A (en) * | 1993-06-16 | 1995-01-10 | Advanced Spine Fixation Systems, Inc. | Clamps for spinal fixation systems |
| US5437669A (en) | 1993-08-12 | 1995-08-01 | Amei Technologies Inc. | Spinal fixation systems with bifurcated connectors |
| US5380326A (en) * | 1993-11-12 | 1995-01-10 | Lin; Chih-I | Clamping device for vertebral locking rod |
| US5611800A (en) | 1994-02-15 | 1997-03-18 | Alphatec Manufacturing, Inc. | Spinal fixation system |
| US5643259A (en) | 1994-03-31 | 1997-07-01 | Ricardo C. Sasso | Spine fixation instrumentation |
| JP3215262B2 (en) * | 1994-06-03 | 2001-10-02 | ユニ・チャーム株式会社 | Disposable body fluid absorbent articles |
| US5507746A (en) | 1994-07-27 | 1996-04-16 | Lin; Chih-I | Holding and fixing mechanism for orthopedic surgery |
| US5474551A (en) * | 1994-11-18 | 1995-12-12 | Smith & Nephew Richards, Inc. | Universal coupler for spinal fixation |
| FR2730155B3 (en) * | 1995-02-03 | 1997-04-18 | Alby Albert | IMPLANT FOR SPINE OSTEOSYNTHESIS DEVICE |
| FR2731344B1 (en) | 1995-03-06 | 1997-08-22 | Dimso Sa | SPINAL INSTRUMENTATION ESPECIALLY FOR A ROD |
| US5613968A (en) | 1995-05-01 | 1997-03-25 | Lin; Chih-I | Universal pad fixation device for orthopedic surgery |
| US5582612A (en) | 1995-05-01 | 1996-12-10 | Lin; Chih-I | Vertebral fixing and retrieving device having centrally two fixation |
| US5562663A (en) | 1995-06-07 | 1996-10-08 | Danek Medical, Inc. | Implant interconnection mechanism |
| FR2749156B1 (en) | 1996-06-03 | 1998-12-04 | Stryker France Sa | DEVICE FOR RIGID TRANSVERSE CONNECTION BETWEEN TWO RODS OF OSTEOSYNTHESIS OF THE RACHIS |
-
1997
- 1997-05-15 US US08/857,137 patent/US6413257B1/en not_active Expired - Lifetime
-
1998
- 1998-05-08 EP EP98108438A patent/EP0878171B1/en not_active Expired - Lifetime
- 1998-05-08 DE DE69816176T patent/DE69816176T2/en not_active Expired - Lifetime
- 1998-05-11 CA CA002237307A patent/CA2237307C/en not_active Expired - Fee Related
- 1998-05-14 AU AU65960/98A patent/AU747932B2/en not_active Ceased
- 1998-05-15 JP JP10172006A patent/JPH1156871A/en active Pending
-
2002
- 2002-05-31 US US10/159,235 patent/US6706045B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2237307A1 (en) | 1998-11-15 |
| AU6596098A (en) | 1998-11-19 |
| US20020143332A1 (en) | 2002-10-03 |
| DE69816176D1 (en) | 2003-08-14 |
| EP0878171A1 (en) | 1998-11-18 |
| EP0878171B1 (en) | 2003-07-09 |
| DE69816176T2 (en) | 2004-04-22 |
| JPH1156871A (en) | 1999-03-02 |
| AU747932B2 (en) | 2002-05-30 |
| US6706045B2 (en) | 2004-03-16 |
| US6413257B1 (en) | 2002-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2237307C (en) | Clamping connector for spinal fixation systems | |
| EP0425783B1 (en) | Pedicle screw clamp | |
| US5344422A (en) | Pedicular screw clamp | |
| US6179838B1 (en) | Bone fixation arrangements and method | |
| US8262702B2 (en) | Osteosynthetic clamp for attaching a bone anchor to a support rod | |
| CA2335059C (en) | Device for securing spinal rods | |
| EP1152705B1 (en) | Spinal fixation system | |
| US8870926B2 (en) | Spinal fixation system | |
| EP1093761B1 (en) | Spinal cross connector | |
| US5562661A (en) | Top tightening bone fixation apparatus | |
| US7122036B2 (en) | Connector for an osteosynthesis system intended to provide a connection between two rods of a spinal osteosynthesis system, osteosynthesis system using such a connector, and method of implanting such an osteosynthesis system | |
| US5989251A (en) | Apparatus for spinal stabilization | |
| EP1330196B1 (en) | Connector for spinal rod and vertebral anchor | |
| KR960004979B1 (en) | Spinal column retaining apparatus | |
| AU2001260001A1 (en) | Spinal fixation system | |
| AU2004285611A1 (en) | Bone fixation system with low profile fastener |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160511 |
|
| MKLA | Lapsed |
Effective date: 20160511 |