US20060253118A1 - Spinal fixation system - Google Patents
Spinal fixation system Download PDFInfo
- Publication number
- US20060253118A1 US20060253118A1 US11/484,495 US48449506A US2006253118A1 US 20060253118 A1 US20060253118 A1 US 20060253118A1 US 48449506 A US48449506 A US 48449506A US 2006253118 A1 US2006253118 A1 US 2006253118A1
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- US
- United States
- Prior art keywords
- flanges
- clamp assembly
- ball
- opposing surfaces
- generally cylindrical
- 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
-
- 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
- A61B17/7041—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
-
- 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
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/701—Longitudinal elements with a non-circular, e.g. rectangular, cross-section
-
- 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
- A61B17/704—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other the longitudinal element passing through a ball-joint in the screw head
Definitions
- the spinal column is a highly complex structure which houses and protects critical elements of the nervous system.
- the spinal column is a highly flexible structure, capable of a high degree of curvature and twist through a wide range motion. Genetic or developmental irregularities, trauma, chronic stress, tumors, and disease, however, can result in spinal pathologies which either limit this range of motion, or threaten the critical elements of the nervous system housed within the spinal column.
- implants are attached to the back of the spinal column generally by coupling to the pedicles with screws, or through hooks that attach under the lamina.
- the implants generally include elongate support rod elements which are coupled to the screws or hooks to immobilize two or more sequential vertebrae, for example to hold them stable so that adjacent bones may be fused with bone graft.
- a spinal fixation system of the type having an elongated support rod and anchors it is important to provide adjustability between the support rod and the anchors. Adjustability facilitates ideal placement of the bone anchors relative to the spine. Preferably, the adjustability between the support rod and the anchors allows the supports rods to translate relative to the anchors and also allows for pivotal movement of the anchors relative to the support rod. The spinal system must also be able to arrest relative movement between the support rod and the anchors after implantation so that the spinal segments are post-operatively immobilized.
- the clamp assembly for securing a bone anchor to a generally cylindrical rod.
- the clamp assembly includes a first portion, a second portion and a compressible ball carried by the second portion, the ball having a through hole for receiving the generally cylindrical rod.
- the first portion includes first and second flanges, each of the first and second flanges defining an aperture for receiving a portion of the bone anchor.
- the first and second flanges are movable from a first position in which the first and second flanges are separated by a gap to a second position in which the first and second flanges are drawn toward each other.
- the first and second flanges include first and second opposing surfaces, respectively, the first and second opposing surfaces being angled relative to one another in the first position.
- FIG. 1 is a perspective view of a spinal fixation system constructed in accordance with the teachings of a preferred embodiment of the present invention, the spinal fixation system shown arranged in an exemplary construct and operatively attached to a human spinal column;
- FIG. 2 is a perspective view of one of the spinal anchors and an associated clamp assembly of FIG. 1 removed from the construct of FIG. 1 for purposes of illustration;
- FIG. 3 is a partially exploded side view of a portion of the construct of FIG. 1 ;
- FIG. 4 is a perspective view of the clamp assembly of FIG. 2 ;
- FIG. 5A is a side view of the clamp assembly of FIG. 4 shown with the first and second flanges normally spaced apart;
- FIG. 5B is a view similar to FIG. 5A illustrating the first and second flanges drawn together.
- FIG. 6 is a cross-sectional view taken along the line 6 - 6 of FIG. 5A .
- a spinal fixation system constructed in accordance with the teachings of the preferred embodiment of the present invention is illustrated and generally identified at reference character 10 .
- components of the system 10 have been arranged in an exemplary construct for attachment to a portion of a spinal column 12 of a human patient.
- the components of the system 10 of the present invention used in the construct of FIG. 10 generally include a linkage in the form of a generally cylindrical support rod 14 , a plurality of spinal anchors 16 for engaging the spinal column 12 , and a plurality of clamp assemblies 18 securing the spinal anchors 16 to the cylindrical rod 14 .
- the spinal anchors are illustrated throughout the drawings as bone screws 16 . Alteratively, it will be understood by those skilled in the art that other types of anchors known in the art may be employed for directly engaging the spine. For example, the anchors may alternatively be hooks that attach under the lamina of the spine.
- the spinal anchor 16 includes an upper threaded shaft portion 20 and a lower threaded shaft portion 22 .
- the upper threaded shaft portion 20 threadably engages a nut 24 when the spinal anchor 16 is secured to a linkage or rod 14 in a manner discussed below.
- the rod is preferably a generally cylindrical rod 14 .
- the clamp assemblies 18 each adjustably interconnect one of the spinal anchors 16 that engage the spinal column 12 with the rod 14 .
- the system 10 of the present invention is illustrated to include three clamp assemblies 18 A, 18 B, 18 C.
- a first of the clamp assemblies 18 A is shown in further detail in FIGS. 2-6 and is illustrated to generally include a body 26 having a first portion 28 for engaging the rod 14 and a second portion 30 for engaging the spinal anchor 16 .
- the body 26 of the clamp assembly 18 A is shown to generally have a C-shape with an intermediate portion or arm that defines an opening 32 for receiving the rod 14 .
- the opening 32 is partially spherical and is adapted to adjustably receive a compressible locking member or ball 34 .
- the compressible locking ball 34 is shown particularly in FIGS. 5A and 5B and the cross-sectional views of FIG. 6 .
- the locking ball 34 is generally spherical in shape and includes an aperture or through hole 36 which passes therethrough for receiving the rod 14 .
- the clamp body 26 and the ball 34 cooperate to form a ball and socket joint that allows pivotal movement of the rod 14 relative to the anchor 16 . This pivotal movement is about an imaginary center of the ball 34 .
- the locking ball 34 is normally permitted to universally move within the opening 32 .
- a slit 38 is provided in the locking ball 34 to facilitate compression of the ball and resulting clamping on the rod 14 .
- the through hole 36 is defined by a generally cylindrical inner surface.
- the generally cylindrical inner surface preferably includes at least one relieved channel 50 .
- the cylindrical inner surface is shown to include five relieved channels 50 .
- the particular number of relieved channels 50 will be understood to be a matter of design choice and may vary from that shown in the drawings.
- the relieved channels 50 allow for a more uniform collapse of the locking ball 34 . In this manner, the locking strength of the clamp assembly 18 is increased independent of the position of the ball 34 within the partially spherical opening defined by the clamp 34 .
- the through hole 36 tapers from a first end 52 of the through hole 36 to a second end 54 of the through hole 36 toward a center of the locking ball 34 .
- the through hole 36 preferably tapers from the first end 52 towards the center and also from the second end 54 towards the center.
- a center portion 56 of the through hole 36 has a constant diameter. This configuration of the through hole 36 allows the locking ball 34 to be loaded and not impinge on a contoured rod.
- the through hole 36 passes through the center of the locking ball 34 .
- the through hole 36 may be eccentric to the sphere defined by the locking ball 34 . By orienting the through hole 36 eccentric to the sphere, adjustments can be made by rotating the locking ball 34 within the clamp body 26 .
- the clamp body 26 further includes a first or upper flange 40 and a second or lower flange 42 .
- the upper and lower flanges 40 and 42 are symmetrical about a plane extending therebetween.
- the upper and lower flanges 40 and 42 are shown to be generally circular in shape.
- the intermediate portion or arm of the clamp body 26 that extends between the flanges 40 and 42 is disposed radially relative to the upper and lower flanges 40 and 42 .
- the upper and lower flanges 40 and 42 define distinct but aligning apertures 44 and 46 (see FIG. 4 ), respectively.
- the apertures 44 and 46 are both associated with recesses 48 to receive either a nut 24 or a partially spherical shaped portion 60 of the screw 16 , respectively. In this manner, it is impossible to put the clamp assembly 18 on the rod 14 upside down.
- first and second flanges 40 and 42 are normally spaced apart by a gap.
- the first and second flanges 40 and 42 include first and second opposing surfaces 62 and 64 , respectively. As shown in FIG. 5A , when the first and second flanges 40 and 42 are normally spaced apart, the opposing surfaces 60 and 64 are angled relative to one another.
- the clamp body 26 is formed to include sufficient spacing between the upper and lower flanges 40 and 42 so that the gap 60 is always maintained throughout the range of tightening. In this manner, clamping forces are more efficiently transferred to the locking ball 34 .
- the clamp body 26 is illustrated in a fully clamped condition in FIG. 5B . As shown, the opposing surfaces 62 and 64 are oriented generally parallel to one another.
- the clamp assemblies 18 B and 18 C will be understood to be identical.
- the clamp assemblies 18 B and 18 C differ from the clamp assembly 18 A in that the second portion 30 is tangentially oriented relative to the first and second flanges 40 and 42 .
- the intermediate portion or arm that connects the first and second flanges 40 and 42 is offset to one side from a radial position. This offset allows the rod 14 to be positioned closer to the anchor 16 and reduces the medial lateral profile of the construct. Otherwise, it will be understood that the clamp assemblies 18 A- 18 C are identical.
Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 10/341,658 filed on Jan. 14, 2003. The disclosure of the above application is incorporated herein by reference.
- The spinal column is a highly complex structure which houses and protects critical elements of the nervous system. In spite of these complexities, the spinal column is a highly flexible structure, capable of a high degree of curvature and twist through a wide range motion. Genetic or developmental irregularities, trauma, chronic stress, tumors, and disease, however, can result in spinal pathologies which either limit this range of motion, or threaten the critical elements of the nervous system housed within the spinal column.
- A variety of systems has been disclosed in the art which achieve immobilization of portions of the spinal column by implanting artificial assemblies in or on the spinal column. These assemblies may be generally classified as anterior, posterior or lateral implants. Posterior implants are attached to the back of the spinal column generally by coupling to the pedicles with screws, or through hooks that attach under the lamina. In either case, the implants generally include elongate support rod elements which are coupled to the screws or hooks to immobilize two or more sequential vertebrae, for example to hold them stable so that adjacent bones may be fused with bone graft.
- During implantation of a spinal fixation system of the type having an elongated support rod and anchors, it is important to provide adjustability between the support rod and the anchors. Adjustability facilitates ideal placement of the bone anchors relative to the spine. Preferably, the adjustability between the support rod and the anchors allows the supports rods to translate relative to the anchors and also allows for pivotal movement of the anchors relative to the support rod. The spinal system must also be able to arrest relative movement between the support rod and the anchors after implantation so that the spinal segments are post-operatively immobilized.
- While known spinal fixation systems have proven to be useful for various applications, they are all associated with drawbacks. In this regard, the fixation screws or hooks of most known systems are difficult or impossible to adequately tighten to arrest relative movement between the anchors and support rod after implantation. Overcoming this limitation typically involves a complex clamping arrangement or an arrangement that requires undue tightening. Use of known systems is often a tedious process, which is inconsistent in result and adds unwanted time to a procedure.
- Accordingly, it remains a need in the art to provide an improved spinal system clamping mechanism for coupling a rod and a bone anchor that overcomes the above discussed and other drawbacks of the prior art.
- The present teachings provide a clamp assembly for securing a bone anchor to a generally cylindrical rod. In one aspect, the clamp assembly includes a first portion, a second portion and a compressible ball carried by the second portion, the ball having a through hole for receiving the generally cylindrical rod. The first portion includes first and second flanges, each of the first and second flanges defining an aperture for receiving a portion of the bone anchor. The first and second flanges are movable from a first position in which the first and second flanges are separated by a gap to a second position in which the first and second flanges are drawn toward each other. The first and second flanges include first and second opposing surfaces, respectively, the first and second opposing surfaces being angled relative to one another in the first position.
- Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
-
FIG. 1 is a perspective view of a spinal fixation system constructed in accordance with the teachings of a preferred embodiment of the present invention, the spinal fixation system shown arranged in an exemplary construct and operatively attached to a human spinal column; -
FIG. 2 is a perspective view of one of the spinal anchors and an associated clamp assembly ofFIG. 1 removed from the construct ofFIG. 1 for purposes of illustration; -
FIG. 3 is a partially exploded side view of a portion of the construct ofFIG. 1 ; -
FIG. 4 is a perspective view of the clamp assembly ofFIG. 2 ; -
FIG. 5A is a side view of the clamp assembly ofFIG. 4 shown with the first and second flanges normally spaced apart; -
FIG. 5B is a view similar toFIG. 5A illustrating the first and second flanges drawn together; and -
FIG. 6 is a cross-sectional view taken along the line 6-6 ofFIG. 5A . - The following description of the preferred embodiments of the present invention is merely exemplary in nature and is in no way intended to limit the subject invention or its application or uses.
- With general reference to the drawings, a spinal fixation system constructed in accordance with the teachings of the preferred embodiment of the present invention is illustrated and generally identified at reference character 10. As shown in the environmental view of
FIG. 1 , components of the system 10 have been arranged in an exemplary construct for attachment to a portion of aspinal column 12 of a human patient. The components of the system 10 of the present invention used in the construct ofFIG. 10 generally include a linkage in the form of a generallycylindrical support rod 14, a plurality ofspinal anchors 16 for engaging thespinal column 12, and a plurality ofclamp assemblies 18 securing thespinal anchors 16 to thecylindrical rod 14. - The spinal anchors are illustrated throughout the drawings as
bone screws 16. Alteratively, it will be understood by those skilled in the art that other types of anchors known in the art may be employed for directly engaging the spine. For example, the anchors may alternatively be hooks that attach under the lamina of the spine. - With particular reference to
FIGS. 2 and 3 , one of thespinal anchors 16 and an associated one of theclamp assemblies 18 are illustrated in further detail. Thespinal anchor 16 includes an upper threadedshaft portion 20 and a lower threadedshaft portion 22. The upper threadedshaft portion 20 threadably engages anut 24 when thespinal anchor 16 is secured to a linkage orrod 14 in a manner discussed below. The rod is preferably a generallycylindrical rod 14. - The clamp assemblies 18 each adjustably interconnect one of the
spinal anchors 16 that engage thespinal column 12 with therod 14. In the exemplary construct ofFIG. 1 , the system 10 of the present invention is illustrated to include threeclamp assemblies clamp assemblies 18A is shown in further detail inFIGS. 2-6 and is illustrated to generally include abody 26 having afirst portion 28 for engaging therod 14 and asecond portion 30 for engaging thespinal anchor 16. Thebody 26 of theclamp assembly 18A is shown to generally have a C-shape with an intermediate portion or arm that defines anopening 32 for receiving therod 14. In the embodiment illustrated, theopening 32 is partially spherical and is adapted to adjustably receive a compressible locking member orball 34. - The
compressible locking ball 34 is shown particularly inFIGS. 5A and 5B and the cross-sectional views ofFIG. 6 . As shown, thelocking ball 34 is generally spherical in shape and includes an aperture or throughhole 36 which passes therethrough for receiving therod 14. As will become more apparent below, theclamp body 26 and theball 34 cooperate to form a ball and socket joint that allows pivotal movement of therod 14 relative to theanchor 16. This pivotal movement is about an imaginary center of theball 34. Thelocking ball 34 is normally permitted to universally move within the opening 32. Aslit 38 is provided in the lockingball 34 to facilitate compression of the ball and resulting clamping on therod 14. - The through
hole 36 is defined by a generally cylindrical inner surface. The generally cylindrical inner surface preferably includes at least onerelieved channel 50. In the embodiment illustrated, the cylindrical inner surface is shown to include fiverelieved channels 50. The particular number ofrelieved channels 50 will be understood to be a matter of design choice and may vary from that shown in the drawings. Therelieved channels 50 allow for a more uniform collapse of the lockingball 34. In this manner, the locking strength of theclamp assembly 18 is increased independent of the position of theball 34 within the partially spherical opening defined by theclamp 34. - As perhaps most particularly shown in the cross-section view of
FIG. 6 , at least a portion of the throughhole 36 tapers from afirst end 52 of the throughhole 36 to asecond end 54 of the throughhole 36 toward a center of the lockingball 34. As shown, the throughhole 36 preferably tapers from thefirst end 52 towards the center and also from thesecond end 54 towards the center. Acenter portion 56 of the throughhole 36 has a constant diameter. This configuration of the throughhole 36 allows the lockingball 34 to be loaded and not impinge on a contoured rod. - In the embodiment illustrated, the through
hole 36 passes through the center of the lockingball 34. Alternatively, the throughhole 36 may be eccentric to the sphere defined by the lockingball 34. By orienting the throughhole 36 eccentric to the sphere, adjustments can be made by rotating the lockingball 34 within theclamp body 26. - The
clamp body 26 further includes a first orupper flange 40 and a second orlower flange 42. In the embodiment illustrated, the upper andlower flanges lower flanges clamp body 26 that extends between theflanges lower flanges lower flanges apertures 44 and 46 (seeFIG. 4 ), respectively. Theapertures nut 24 or a partially spherical shapedportion 60 of thescrew 16, respectively. In this manner, it is impossible to put theclamp assembly 18 on therod 14 upside down. - As shown particularly in
FIG. 5A , the first andsecond flanges second flanges surfaces FIG. 5A , when the first andsecond flanges surfaces - Upon tightening of the
nut 24, movement of theclamp body 26 relative to therod 14 is arrested. Explaining further, tightening of thenut 24 serves to draw the upper andlower flanges clamp body 26 to compress squeeze the lockingball 34 and correspondingly clamp therod 14. Relative movement is also arrested between the lockingball 34 and theclamp body 26. - Importantly, the
clamp body 26 is formed to include sufficient spacing between the upper andlower flanges gap 60 is always maintained throughout the range of tightening. In this manner, clamping forces are more efficiently transferred to the lockingball 34. Theclamp body 26 is illustrated in a fully clamped condition inFIG. 5B . As shown, the opposingsurfaces - With particular reference to
FIGS. 1 , theclamp assemblies clamp assemblies clamp assembly 18A in that thesecond portion 30 is tangentially oriented relative to the first andsecond flanges second flanges rod 14 to be positioned closer to theanchor 16 and reduces the medial lateral profile of the construct. Otherwise, it will be understood that theclamp assemblies 18A-18C are identical. - The foregoing discussion discloses and describes merely exemplary arrangements of the present invention. One skilled in the art will readily recognize from such discussion, and from the accompanying drawings and claims, that various changes, modifications and variations can be made therein without departing from the spirit and scope of the invention as defined in the following claims.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/484,495 US20060253118A1 (en) | 2003-01-14 | 2006-07-11 | Spinal fixation system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/341,658 US7104992B2 (en) | 2003-01-14 | 2003-01-14 | Spinal fixation system |
US11/484,495 US20060253118A1 (en) | 2003-01-14 | 2006-07-11 | Spinal fixation system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/341,658 Continuation US7104992B2 (en) | 2003-01-14 | 2003-01-14 | Spinal fixation system |
Publications (1)
Publication Number | Publication Date |
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US20060253118A1 true US20060253118A1 (en) | 2006-11-09 |
Family
ID=32711554
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/341,658 Active 2024-07-17 US7104992B2 (en) | 2003-01-14 | 2003-01-14 | Spinal fixation system |
US11/484,495 Abandoned US20060253118A1 (en) | 2003-01-14 | 2006-07-11 | Spinal fixation system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US10/341,658 Active 2024-07-17 US7104992B2 (en) | 2003-01-14 | 2003-01-14 | Spinal fixation system |
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US (2) | US7104992B2 (en) |
EP (1) | EP1454593A1 (en) |
Cited By (45)
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US20100268279A1 (en) * | 2007-07-19 | 2010-10-21 | Josef Gabelberger | Clamps used for interconnecting a bone anchor to a rod |
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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 |
US7993372B2 (en) | 2007-06-05 | 2011-08-09 | Spartek Medical, Inc. | Dynamic stabilization and motion preservation spinal implantation system with a shielded deflection rod system and method |
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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 |
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US8992579B1 (en) * | 2011-03-08 | 2015-03-31 | Nuvasive, Inc. | Lateral fixation constructs and related methods |
US9060815B1 (en) | 2012-03-08 | 2015-06-23 | Nuvasive, Inc. | Systems and methods for performing spine surgery |
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US9468471B2 (en) | 2013-09-17 | 2016-10-18 | K2M, Inc. | Transverse coupler adjuster spinal correction systems and methods |
US9468468B2 (en) | 2011-11-16 | 2016-10-18 | K2M, Inc. | Transverse connector for spinal stabilization system |
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US20040138661A1 (en) | 2004-07-15 |
EP1454593A1 (en) | 2004-09-08 |
US7104992B2 (en) | 2006-09-12 |
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