WO2000062691A1 - Variable angle connection assembly for a spinal implant system - Google Patents
Variable angle connection assembly for a spinal implant system Download PDFInfo
- Publication number
- WO2000062691A1 WO2000062691A1 PCT/US2000/010965 US0010965W WO0062691A1 WO 2000062691 A1 WO2000062691 A1 WO 2000062691A1 US 0010965 W US0010965 W US 0010965W WO 0062691 A1 WO0062691 A1 WO 0062691A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- washer
- opening
- assembly according
- elongated
- spinal implant
- Prior art date
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
-
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B2017/603—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 for external osteosynthesis, e.g. distractors, contractors with three points of contact, e.g. tripod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter
Definitions
- the present invention relates generally to the field of spinal implant systems, and particularly systems that employ elongated spinal implants, such as rod and plates, connected at various locations along the spinal column. More particularly, the invention concerns a connection assembly that provides variable angle and variable height adjustability to the elongated spinal implant relative to a bone fastener engaged to the spine.
- a bendable elongated spinal implant such as a rod
- a bendable elongated spinal implant is longitudinally disposed adjacent the vertebral column and then secured to various vertebrae along the length of the column by way of a number of bone fasteners or fixation elements.
- bone fasteners can be utilized, such as hooks or bone screws, which are configured to engage specific portions of a vertebra.
- TSRH® Spinal System of Sofamor Danek Group, Inc.
- various hooks and bone screws are engaged to a spinal rod by way of eyebolts.
- the vertebral hooks and bone screws were attached to the spinal rod at a fixed orientation, usually projecting perpendicularly below the rod.
- the TSRH® Spinal System presented a significant advance over prior systems in its VERSATILITY, strength of fixation, and ease of implantation.
- TSRH® Spinal System As well as the other prevalent fixation systems, was that a surgeon was required to make significant adjustments to the contour of the bendable rod so that the bone fasteners could solidly engage the vertebral bodies. What was needed, then, was a bone fastener that could be connected to the spinal rod at a variable angle.
- the TSRH® Variable Angle Screw was developed, as described in U.S. Patent No. 5,261,909. This Variable Angle Screw utilized the same TSRH® eyebolt to achieve a connection to a spinal rod.
- the Variable Angle system incorporated a washer that fit over the eyebolt, engaged the spinal rod within a groove in one surface of the washer, and provided a radially splined surface facing the bone fastener.
- the bone fastener had a complementary splined surface so that the fastener could be situated at variable angular orientations relative to the spinal rod.
- a nut threaded onto the post of the eyebolt clamped all the components together to complete the assembly.
- the Variable Angle Screw system of the '909 Patent presented a significant advance over prior rod-based implant systems.
- the system of the '909 Patent was relatively compact and required a minimal number of parts yet was able to accomplish a solid fixation of the bone fastener to the rod at a wide range of angular orientations.
- One drawback of the system was that the eyebolt-nut combination required side-tightening of the nut to clamp the system together. This side-tightening aspect required a larger surgical site about the spine so that a wrench could be manipulated.
- a top-tightening assembly was developed as disclosed in U.S. Patent No. 5,282,801.
- the clamp assembly depicted in the ⁇ 801 Patent replaced the eyebolt and nut with a clamp body having a T-bar against which the head of the variable angle bone fastener was clamped.
- the top-tightening approach of the x 801 Patent utilized a set screw that acted against the spinal rod to push the spinal rod into the interlocking washer, and ultimately against a complementary spline face of the variable angle screw. With this system, the variable angle capability was retained, while a top-tightening feature was added.
- the more recent TSRH® Spinal System has provided surgeons with a great deal of flexibility in the placement and orientation of bone fasteners, such as hooks and screws, relative to a spinal rod.
- the Variable Angle components greatly reduce the need to manipulate and bend the spinal rod to conform to the patient's anatomy.
- a certain amount of shaping or contouring of the spinal rod has still been required.
- the rod must be shaped so that at the point of attachment of the bone fastener, the rod is the same distance from the vertebral body as the splined or interdigitating portion of the bone fastener.
- vertical or height adjustability it is meant adjustment along the length of the bone fastener. Adjustment in this dimension allows the rod to be situated at varying distances from the spine, or oriented with a pre-set contour regardless of the location of fastener.
- the screw described in the '263 Patent includes an elongated smooth shank portion.
- the connection assembly also adds a second washer disposed between the original washer and the smooth shank of the bone screw.
- the interdigitating feature exists between the contacting faces of the adjacent washers.
- the variable height is accomplished by a groove provided in the opposite surface of the additional washer that allows the connection assembly to slide along the shank of the bone screw until it is finally clamped together by a set screw.
- connection assembly shown in the ⁇ 263 Patent goes a step further toward an easy-to-implant variable angle, variable height assembly, it too has left some room for improvement.
- the connector assembly of the 763 Patent requires an additional washer that adds to the number of components that must be manipulated by the surgeon.
- the added washer increases the lateral profile of the implant assembly.
- regions of the spine such as the thoracic and cervical regions, there is limited space transverse to the vertebral bodies.
- An optimal spinal implant system that has universal applicability should have as small a lateral profile as possible.
- a connection assembly for a spinal implant system.
- a connection assembly includes a first member or body that defines an opening through which an elongated spinal implant, such as a spinal rod, can extend.
- a second member is provided that includes a second opening through which extends an elongated stem or shank of a bone fastener, such as a bone screw or hook.
- the two members are attached by a connecting means that allows the members to pivot relative to each other about a connection axis. This connecting means thus provides a mechanism for variable angular orientations of the bone fastener relative to the elongated spinal implant.
- the second opening in the second member adds the height adjustment capability.
- an interface washer is disposed over both the first and the second member of the connection assembly.
- the interface washer includes a first face having a groove defined therein for engagement with the elongated spinal implant extending through the opening in the first member.
- the interface washer also includes an opposite second face that is directed toward the stem of the bone fastener. This second face of the interface washer includes an interface element defined thereon.
- the shank of the bone fastener also includes a complementary interface element facing the interface washer.
- the second face of the interface washer includes a radially splined surface about a central opening.
- the central opening provides means for the washer to be passed over and about the first and second members of the connection assembly.
- the interface element on the shank of the bone fastener in this embodiment includes a rib extending along the length of the fastener. The rib is configured to reside between the radial splines of the interface washer.
- the central opening of the interface washer is non-circular to mate with a complementary non-circular profile of the first member of the connection assembly.
- the second member is sized so that it can be freely rotated within the central opening of the interface washer.
- the rib of the bone fastener projects externally from an essentially constant diameter stem.
- the stem of the bone fastener includes a truncated surface along at least a portion of its length so that the shank has a non-circular transverse cross section.
- the interface element, or rib then projects from the truncated surface.
- one or both of the interface washer and shank of the bone fastener can include a raised pattern, such as a Crosshatch, multi-faceted, or knurled pattern.
- one of the interface washer or shank of the bone fastener can include a raised pattern, while the other of the two components can have a surface configured to permit penetration of the raised pattern.
- a connection assembly in an alternative embodiment, includes a one-piece body that defines one opening for receiving the elongated spinal implant and a second substantially perpendicularly oriented opening for receive the stem of the bone fastener.
- One or both of the openings are configured to permit variable orientations of the elongated spinal implant within the first opening or the stem of the bone fastener within the second opening.
- one or both of the openings are defined by a pair of channels that widen from a central portion of the opening outward toward the outer surface of the body.
- the elongated spinal implant can carry an interface element for engagement with an interface element on the intermediate washer.
- the intermediate washer can include a groove on its opposite surface to engage a smooth stem of the bone fastener.
- the bone fastener maintains a fixed orientation relative to the interface washer, just as the spinal implant has a fixed orientation in the embodiments identified above.
- the bone fastener still retains its height adjustment capability.
- the variable angle adjustment is manifested between the spinal implant, or rod, and the interface washer.
- the elongated spinal implant, or rod is clamped within the first body of the connection assembly by way of a second washer and a nut.
- the connection assembly includes a first member defining an aperture for receiving the spinal implant, and a second member pivotably connected to the first member and defining an aperture for receiving a bone fastener.
- An interface washer is disposed between the spinal implant and the bone fastener in a manner implemented in other embodiments described above.
- the first member can include a threaded stem projecting outward in a direction opposite the interface washer.
- a second washer is threaded over the first body so the spinal implant, or rod, is sandwiched between the interface washer and the second washer.
- An internally threaded nut is threaded onto the threaded stem to clamp the connection assembly together. It is one object of the present invention to provide a spinal implant system that includes bone fasteners capable of achieving variable angular and height/vertical orientations relative to an elongated member spanning between locations along the spine. A further object is to provide this variable angle/variable height capability with a minimum number of components that must be manipulated by the surgeon within the surgical site.
- variable angle/variable height components can be easily clamped together to insure a solid fixation of the instrumented portion of the spine.
- a further benefit is achieved by features of the invention that permit top-tightening of the components within the patient.
- FIG. 1 is a side elevational view of a spinal implant connection assembly according to the prior system disclosed in U.S. Patent No. 5,643,263.
- FIG. 2 is a top elevational view of the spinal implant assembly as shown in FIG. 1.
- FIG. 3 is a side elevational view of a variable angle connection assembly according to one embodiment of the present invention.
- FIG. 4 is a top elevational view of the connection assembly as shown in FIG. 1.
- FIG. 5 is a top elevational view of a bone engaging fastener used with the connection assembly shown in FIGS. 3 and 4.
- FIG .6 is a side elevational view of the bone fastener shown in FIG. 5.
- FIG. 7 is a top elevational view of an alternative embodiment of a bone fastener for use with the connection assembly shown in FIGS. 3 and 4.
- FIG. 8 is an end elevational view of an interface washer component of the connection assembly as shown in FIGS. 3 and 4.
- FIG. 9 is a top elevational view of a second member of the connection assembly shown in FIGS. 3 and 4.
- FIG. 10 is an exploded, partial cross section view, of the components of the connection assembly shown as FIGS. 3 and 4.
- FIG. 11 is an end elevational view of an interface washer for use with a connection assembly in accordance with an alternative embodiment of the present invention.
- FIG. 12 is a top elevational view of a bone fastener for use with the interface washer shown in FIG. 11.
- FIG. 13 is a side perspective view of the alternative embodiment of the bone fastener shown in FIG. 12.
- FIG. 14 is a side elevational view of a variable angle/variable height connection assembly according to another embodiment of the present invention.
- FIG. 15 is an end elevational view of the connection assembly shown in
- FIG. 16 is an end elevational view of a variable angle and height connection assembly according to a further embodiment of the invention.
- FIG. 17 is a side elevational view of the connection assembly depicted in FIG. 16 with a fixation set screw added.
- FIG. 18 is an exploded perspective view of components of a connection sub-assembly according to yet another embodiment of the present invention.
- FIG. 19 is a side elevational view of a variable angle/height connection assembly in accordance with still a further embodiment of the invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS
- the present invention contemplates a variable angle and variable height connection assembly for connecting a bone fastener, such as a bone screw or hook, to an elongated spinal implant, such as a spinal rod, bar or plate. It is understood that the components of this connection assembly are formed of a medical grade material, preferably a metal such as stainless steel or titanium.
- the components are sized for introduction and implantation within the spine of a human patient. It is contemplated that the invention can be implanted at all levels of the spine, namely the cervical, thoracic, and lumbar levels, and from the posterior or anterior aspects of the spine.
- the components can be sized appropriately for each of the levels of the spine, with the overall size of the components being determinable by the ordinarily skilled artisan in the field of spinal implants.
- connection assembly 10 shown in FIG. 1 includes a rod connection member 11 that defines an elongated opening 12 through which a spinal rod R extends.
- a set screw 13 is threaded through the rod connection member 11, into the opening 12 and in contact with the spinal rod R.
- This prior art connection assembly 10 further includes a bolt connection member 15 defining a bolt opening 19 through which a bolt 16 extends.
- the bolt includes a non-threaded, smooth cylindrical post at one end and bone engaging threads 18 at an opposite end.
- the bolt connection member 15 is rotatably connected to the rod connection member 11 in a manner described in the ⁇ 263 Patent with reference to FIGS. 1 and 2 of that patent, which description is incorporated herein by reference.
- the bolt connection member 15 is free to pivot or rotate relative to the rod connection member 11, which means that the bolt 16 can assume variable angular orientations relative to the rod R.
- the connection assembly 10 includes a rod interface washer 20 and a bolt interface washer 23.
- the rod interface washer 20 includes an engagement groove 21, which receives the spinal rod R.
- the bolt interface washer 23 includes an engagement groove 24 into which is disposed the post 17 of the bolt 16.
- a spline interface 25 is provided between the two interface washers 20 and 23.
- connection assembly 30 that permits similar variable angle and variable height adjustments to the position of the bone fastener relative to an elongated spinal implant.
- the elongated spinal implant can take a variety of forms, such as a rod or a plate.
- the spinal implant can have a circular or a non-circular cross-section that is preferably configured to permit attachment of a connection assembly 30 at various positions along the length of the implant.
- the spinal implant can also be configured to permit rotation of the connection assembly about the longitudinal axis of the implant.
- the bone fastener is a bone bolt or screw.
- bone fasteners are contemplated, such as various types of vertebral hooks and bone screws.
- the principles of the invention can be applied to other spinal implant components that are not necessarily engaged to a vertebra.
- variable angle and variable length positioning can be contemplated in connection with a transverse connector between two spinal implants running generally parallel to each other along a length of the spine.
- a laterally extending component can be attached to a spinal implant using the present inventive connection assembly, where other implants, such as bone fasteners, are attached to the laterally extending component.
- connection assembly 30 includes a first member 31 that defines a transverse opening 32 therethrough.
- the opening 32 is slightly elongated and is sized to receive an elongated spinal implant therethrough. More particularly the opening
- connection assembly 30 also includes a second member 35 that a defines a second opening 36 therethrough.
- the opening 36 is sized to slidingly receive the stem of a bone fastener therethrough.
- the opening 36 is also elongated in a direction toward the first member 31.
- connection assembly 30 includes connecting means 39 between the first member 31 and the second member 35.
- This connecting means 39 is configured to permit relative pivoting between the two members about a connection axis A. More particularly, the two members can be individually rotated in the direction of the arrows R as shown in FIG. 10.
- the connecting means 39 can take a variety of forms.
- the connecting means 39 can constitute the snap-together swivel connection shown in FIGS. 1 and 2 of U.S. Patent 5,643,263, and described at column 2, lines 31-46 of the patent which disclosure is incorporated here and by reference.
- the connecting means 39 includes a threaded post 70 extending from an end portion 67 of the first member 31.
- the connecting means 39 also includes a mating threaded bore 71 defined in the end face 38 of the second member 35.
- the relative rotation between the two components 31 and 35 can be achieved by threading or unthreading the post 70 relative to the bore 71.
- the pitch of the threads of the components means 39 can be controlled so that the separation between the first member 31 and second member 35 does not vary significantly even as the relative angular position between the two components changes.
- the threads on either or both of the post 70 and bore 71 can be configured in the nature of locking threads so the two components will maintain their angular positions prior to final clamping.
- the length of the threads on either the post 70 or bore 71 can be limited since it is anticipated that only limited angular variations would be necessary in the use of the connection assembly 30. It is generally anticipated that angular variations of ⁇ 20-25° from the vertical would satisfy most spinal anatomies.
- the bone fastener 40 includes a bone engaging portion 41 that is configured for attachment to a portion of the spine.
- the bone engaging portion 41 constitutes bone engaging threads in the nature of a pedicle screw.
- other bone attachment configurations are contemplated by the invention.
- the fastener 40 also includes an elongated stem 42 at the top portion of the fastener.
- An internal hex 43 (see FIGS. 4 and 5) is provided for engaging a tool for screwing the bone fastener 40 into a vertebrae.
- an external hex or driving portion can be provided for engagement by an appropriate driving tool.
- the internal hex 43 is not essential, but gripping recesses may be added to the stem.
- the bone fastener 40 includes an interface element 45 that is configured for interlocking engagement with the interface washer 50. Details of the interface washer 50 are shown in FIGS. 3, 4, and 8.
- the washer 50 includes a first face 51 that is orientated to the elongated spinal implant, or rod R.
- a rod groove 52 is formed in the first face 51.
- the rod groove is defined at a radius that is smaller than the radius of the spinal rod R.
- This design for the rod groove 52 is in accordance with the "3- point-shear clamp" feature of the TSRH® system. While the preferred embodiment of the present invention contemplates the use of a rod groove 52 for a circular rod R, other clamping or attachment mechanisms are contemplated.
- the spinal rod R can be formed of a relatively softer material than the interface washer 50, while the first face 51 of the washer can include surface features configured to penetrate the rod R.
- Other rod clamping arrangements can be contemplated that can solidly fix the interface washer 50 to the rod R to prevent relative movement under spinal loads.
- the interface washer 50 includes an opposite second face 53, shown most clearly in FIG. 8. This second face incorporates an interface element 54 that cooperates with the interface element 45 of the bone fastener 40.
- the interface element 54 of the washer 50 includes a plurality of radially arranged splines. This spline configuration can be similar to the splined washer disclosed in U.S. Patent No. 5,261,909, which can alternatively be described as alternating ridges or teeth. The radial pattern of the splines converge at the rotational center of the washer 50, or more particularly about the opening 55.
- the interface element 45 of the bone fastener 40 in this embodiment constitutes a rib that is configured to reside between the splines of the interface element 54 on the second face 53 of the washer 50.
- the rib or interface element 45 of the bone fastener 40 preferably extends along substantially the entire length of the elongated stem 42. In this way, the height position of the stem 42 can be varied relative to the interface washer 50, while still retaining the interlocking relationship between the splines and the rib.
- the spline or interface element 45 projects from the outer diameter of the stem 42 as shown in FIG. 5.
- a bone fastener 40' includes a stem 42' that defines a truncated face 45A'.
- the interface element can then constitute a rib 45B' projecting from the truncated face.
- the bone fastener 40' can then be identical in all other aspects to the bone fastener 40 shown in FIGS. 5 and 6.
- the alternative bone fastener 40' shown in FIG. 7 requires different machining to fabricate than the bone fastener 40 shown in FIG. 5.
- One advantage of the alternative fastener 40' is that the truncated face 45A' shortens the lateral profile since the elongated stem 42' of the fastener 40' can be situated closer to the spinal rod R when the connection assembly is clamped together.
- an interface washer 75 can include a second face 76 having a raised pattern 77 defined thereon.
- the raised pattern can be in the nature of cross-hatching, multi-faceting, or knurling.
- a bone fastener 80 as depicted in FIGS. 12 and 13 can include an elongated shank 81 with a truncated face 85.
- a raised pattern 86 can be defined on the truncated face 85 that provides for interdigitated engagement with the similarly configured interface washer 75.
- the bone fastener 80 can include an internal driving hex 82 and a bone engaging portion 83.
- one of either the bone fastener or the interface washer can be formed of a relatively softer material than the other.
- stem of the bone fastener such as the fastener 80 in FIG. 13 can be formed of a relatively softer material than the interface washer, such as washers 50 (FIG. 8) or 75 (FIG. 11).
- the raised pattern on either interface washers can then penetrate the relatively softer material of the bone fastener stem to essentially interdigitate with the fastener.
- the raised pattern must permit both the variable angle and variable height or vertical positioning of the components relative to each other.
- a knurled pattern is applied to both components, which knurled pattern can constitute a large number of pyramid-shaped peaks and valleys.
- the washer 50 must remain stationary relative to the second member 35 and bone fastener 40.
- the interface washer 50 includes an opening 55 that has a width W and a height H.
- the opening 55 is non-circular and conforms to the outer profile of the end portion 67 of the first member 31. With this configuration, the washer 50 can be slid onto the end portion 67 until it contacts a shoulder 68.
- the complementary non-circular profiles of the end portion 67 and opening 55 prevent rotation of the washer 50 relative to the first member
- the washer can act as a rotational anchor for the bone fastener 40 when the connection assembly 30 is clamped together.
- the second member 35 is preferably cylindrical.
- the second member 35 can then have a diameter D that is less than the width W of the opening 55 in the interface washer 50. With this arrangement, the second member 35 can rotate relative to the first member even when the washer 50 is disposed about the first member and second member.
- connection assembly 30 also includes a means for urging the elongated implant, or rod R, and the elongated stem 42 of the bone fastener 40 together.
- this means for urging includes a set screw 60 having an engagement tip 61 that is configured to contact the spinal rod R.
- the tip 61 can have a variety of shapes for translating the longitudinal motion of the set screw to a lateral force on the rod.
- the screw also includes a head 62 for engagement by a driving tool, and a series of screw threads 63 that are configured to be threaded into a complementary threaded bore 65.
- the bore 65 is defined in the first member 31 and intersects the opening
- the arrangement and alignment of the threaded bore 65 and set screw 60 is such that threading the screw into the bore exerts a lateral force on the spinal rod R pushing it toward one end of the opening 32. More specifically, as the set screw 60 is threaded into the bore 65, it gradually urges or pushes the spinal rod R toward the interface washer 50 and the second member 35. As depicted in the figures, the set screw is top-tightening; meaning that it is readily accessed directly posterior to the connection assembly. This feature reduces the lateral profile of the connection assembly and makes final tightening of the assembly much easier for the surgeon.
- connection assembly 30 the bone fastener 40 is engaged to a specific vertebra at a desired orientation.
- the rod R is manipulated so that the assembly 30, which has been pre-threaded on the rod is aligned with the stem 42 sO the second member 35 can be dropped onto the fastener with the stem 42 projecting through the second opening 36.
- the second member 35 pivots relative to the first member 31 attached to the rod.
- the second member 35 floats along the stem until the final height alignment is achieved.
- connection assembly 30 has assumed its final height and angular orientation.
- a torque limiting set screw 60 can be provided in which the head 62 of the screw shears off at a predetermined torque so that over-tightening of the set screw is avoided.
- the interface washer 50 has a thickness T that is calibrated to permit solid tightening of the connection assembly 30 about the rod R and bone fastener 40.
- the interface washer 50 is disposed simultaneously over both the first member and the second member.
- the washer can maintain contact with the spinal rod R before it is urged to the end of the opening 32.
- the washer can maintain contact with the stem 42 of the bone fastener 40 when the stem is pressed into the contact end 37 of the elongated opening 36.
- connection assembly 90 includes a one-piece body 91.
- the body defines an elongated rod opening 92 and an elongated bolt opening 93.
- the axes through the two openings are mutually perpendicular, while the openings are both elongated in the same direction.
- the bolt opening 93 defines a contact end 94 at one end of the body 91 against which the bolt 96 is pressed when the connection assembly 90 is finally tightened.
- the connection assembly 90 also includes an interface washer 95, which can be similar to any of the interface washers described above.
- the washer 95 is threaded over the body 91 between the rod R and the bolt 96, and more particularly the stem 97 of the bolt.
- the interface washer 95 and bolt 96 can include interface engagement means, which means 98 can include any of the interface elements described above.
- the bolt opening 93 is configured to permit angular variation of the position of the stem 97 relative to the rod R.
- the bolt opening 93 is defined by a pair of diverging or widening channels 99 that open at the top and bottom of the body 91.
- the channels converge at a center portion C located generally at the mid point of the body 91.
- the bolt opening 93 has a width at the center position sufficient to receive the stem 97 of the bolt 96 therethrough.
- the center position C of the opening 93 essentially acts as a fulcrum about which the body 91 can be pivoted relative to the bolt 96 to properly orient the body.
- the widening channels 99 diverge at a predetermined angle based upon the anticipated range of angular orientation of the bolt 96 relative to the connection assembly 90.
- a connection assembly 110 includes a one-piece body 111 that has a generally cylindrical outer surface or profile 112.
- the body defines an elongated first aperture 113 configured to receive an elongated spinal implant, such as rod R, therein.
- the body also defines an elongated second aperture oriented substantially perpendicular to the first aperture and configured to receive the stem of a bone fastener 120 therethrough.
- connection assembly 110 includes an interface washer 117 defining a groove 118 for receiving the spinal implant.
- the opposite face of the washer includes an interface element 119 for complementary engagement with an interface element 121 on the bone fastener 120.
- the interface washer 119 can define a circular opening for passage over the cylindrical surface 112 of the body 111.
- the washer 117 is free to rotate about the body 111. The orientation of the washer will be fixed when the assembly 110 is tightened because the spinal implant R will engage the washer at the groove 118.
- the first aperture 113 includes opposite diverging channels 114.
- the channels converge at a center point 115 within the body 111, with the gap at the being sufficient to receive the spinal implant R therethrough.
- the implant R can assume variable angular orientations relative to the connection assembly 110, and particularly the body 111.
- the second aperture 116 for the bone fastener 120 can have a uniform cross-section, or can also include the diverging channels, as shown in FIG. 15. It is understood that the diverging channel features (channels 99 of FIG. 15, and/or channels 114 of FIG. 16) can be implemented in the earlier described embodiments of the invention to provide additional angular degrees of freedom for the inventive connection assembly.
- the connection assembly can include the sub-assembly components 130 shown in FIG. 18.
- the elongated spinal implant 131 includes an interface element 132.
- An interface washer 134 can include a mating interface element 135 directed toward the implant 131.
- the interface elements 132, 135 can be of any of the forms described above provided they are sufficient to fix the washer and implant from relative rotation or movement.
- the opposite face of the washer 134 can define a groove 136 to receive the stem 139 of a bone fastener 138.
- the stem 139 is a smooth stem, although it may include various surface features to enhance fixation with the washer 134.
- the variable angle capability is accomplished between the elongated implant 131 and the washer 134.
- the bone fastener 138 has a fixed angular orientation relative to the washer, it can achieve variable height orientations.
- the spinal implant 131 is depicted as an elongated bar having a substantially flat surface defining the interface element 132.
- the implant 131 can have a circular cross-section, with the interface element being defined around the entire surface of the implant.
- the spinal implant 131 can be formed of a relatively softer material than the washer 134.
- the interface element 135 of the washer 134 can be configured to penetrate the implant 131, thereby locking the two components against relative movement.
- connection assembly 150 can be similar to the assembly 50 shown in FIG. 3-10.
- the assembly 150 can include a first member 151 defining an elongated aperture 152 for receiving a spinal implant R therethrough.
- the assembly also includes a second member 155 that is rotatably connected to the first member in a manner described above.
- the second member also defines an aperture 156 for receiving a bone fastener 162 therethrough.
- connection assembly 150 also includes an interface washer 158 that defines a groove 159 for receiving the implant R and an opposite interface element 160 for mating with an interface element 163 of the bone fastener 162.
- the connection assembly 150 is configured and operates like the assembly 50 described above.
- a means for urging 164 is provided that includes a clamping washer 165 that contact the spinal implant.
- the clamping washer 165 preferably defines a groove 166 for receiving the spinal implant R, although the groove is not necessary for the clamping the assembly together.
- the first member 151 defines a threaded post 153 projecting outward and away from the interface washer 158.
- the clamping washer 165 is threaded over the post 153 and first member 151 so that the spinal implant R is sandwiched between the interface washer 163 and clamping washer 165.
- a nut 170 can be threaded onto the threaded post 153 to contact the clamping washer 165 and urge it into the implant R. As the nut is tightened further, the stack including the clamping washer 165, implant R, interface washer 158 and bone fastener 162 are clamped together. While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.
- the first member 31 as described must be pre-loaded onto the rod.
- the member can be configured for top-loading onto the rod by incorporating the top-loading features of the connector depicted in FIG. 4 of U.S. Patent No. 5,562,662 as described at column 7, lines 10-13, and as depicted in FIGS. 3A-3C and described at column 5, line 56 - column 8, line 11, which descriptions are incorporated herein by reference.
- the means for urging, or set screw 60 is engaged within the first member 31.
- the clamping force can be applied at the second member 35.
- the tip of the set screw would preferably be modified from the configuration shown in FIG. 10 of the present application.
- This alternative arrangement for the means for urging can be configured like the connector shown in FIGS. 3A-3C of the ⁇ 662 Patent and described at column 5, line 6 - column 8, line 11, which description has been incorporated by reference.
- the set screw would act against the stem 42 of the bone fastener 40 to push the stem against the washer 50, which then urges the rod R against the opposite end of the opening 32.
- a similar alternative configuration can be implemented with the clamping assembly 164 illustrated in FIG. 19.
- the bone fastener 40 has been described as including a generally circular cross-section stem 42.
- Non-circular cross-sections can be utilized provided hat the shape accommodates solidly clamping the stem 42 within the opening 36 in the second member.
- the contact end 37 of the opening 36 can have a complementary shape.
- either or both the contact end 37 and stem 42 can have a surface roughening or interdigitating feature to enhance the clamping effect and resistance against slipping.
- the washer 50 is described as including a groove 52 for clamping the rod
- the clamping feature can be modified to accommodate variations in the shape of the elongated spinal implant.
- the rod R can have a non-circular cross section.
- the two members 31 and 35 are connected by a connecting means 39 that permits relative rotation between the two components.
- the connecting means can provide for variable lateral separation between the two members, either alone or with the relative rotation capability.
- the connecting means 39 includes the threaded post 70 and bore 71
- the thread pitch can be modified to permit coarse adjustments in the lateral separation as one member is rotated relative to the other.
- the second opening 36 in the second member 35 can be configured like the opening 93 in the embodiment of the one-piece body 91.
- the interface element 45 on the bone fastener 40 can have varying degrees of prominence.
- the interface element or rib 45 projects 0.04 - 0.10 inches from the stem 41. The rib can project farther from the stem, with a commensurate decrease in the thickness T of the interface washer 50.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU46583/00A AU4658300A (en) | 1999-04-21 | 2000-04-21 | Variable angle connection assembly for a spinal implant system |
DE10084498T DE10084498T1 (en) | 1999-04-21 | 2000-04-21 | Angle-variable connection arrangement for a spinal implant system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/296,104 | 1999-04-21 | ||
US09/296,104 US6183473B1 (en) | 1999-04-21 | 1999-04-21 | Variable angle connection assembly for a spinal implant system |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000062691A1 true WO2000062691A1 (en) | 2000-10-26 |
WO2000062691B1 WO2000062691B1 (en) | 2000-12-14 |
Family
ID=23140626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/010965 WO2000062691A1 (en) | 1999-04-21 | 2000-04-21 | Variable angle connection assembly for a spinal implant system |
Country Status (4)
Country | Link |
---|---|
US (2) | US6183473B1 (en) |
AU (1) | AU4658300A (en) |
DE (1) | DE10084498T1 (en) |
WO (1) | WO2000062691A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8636783B2 (en) | 2006-12-29 | 2014-01-28 | Zimmer Spine, Inc. | Spinal stabilization systems and methods |
Families Citing this family (144)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6872209B2 (en) * | 2000-03-15 | 2005-03-29 | Sdgi Holdings, Inc. | Spinal implant connection assembly |
US6572618B1 (en) * | 2000-03-15 | 2003-06-03 | Sdgi Holdings, Inc. | Spinal implant connection assembly |
US6562038B1 (en) * | 2000-03-15 | 2003-05-13 | Sdgi Holdings, Inc. | Spinal implant connection assembly |
US7322979B2 (en) * | 2000-03-15 | 2008-01-29 | Warsaw Orthopedic, Inc. | Multidirectional pivoting bone screw and fixation system |
US7056321B2 (en) * | 2000-08-01 | 2006-06-06 | Endius, Incorporated | Method of securing vertebrae |
US7985247B2 (en) * | 2000-08-01 | 2011-07-26 | Zimmer Spine, Inc. | Methods and apparatuses for treating the spine through an access device |
US6685705B1 (en) | 2000-10-23 | 2004-02-03 | Sdgi Holdings, Inc. | Six-axis and seven-axis adjustable connector |
US6520962B1 (en) * | 2000-10-23 | 2003-02-18 | Sdgi Holdings, Inc. | Taper-locked adjustable connector |
US6579292B2 (en) * | 2001-06-18 | 2003-06-17 | Sdgi Holdings, Inc. | Connection assembly for spinal implant systems |
FR2831420B1 (en) * | 2001-10-30 | 2004-07-16 | Vitatech | APPARATUS FOR HOLDING THE SPIN WITH JOINTING ASSEMBLY |
US6648887B2 (en) * | 2002-01-23 | 2003-11-18 | Richard B. Ashman | Variable angle spinal implant connection assembly |
AU2004203309B2 (en) * | 2002-01-23 | 2008-12-11 | Richard B. Ashman | Variable Angle Spinal Implant Connection Assembly |
CA2473930C (en) * | 2002-01-23 | 2007-10-30 | Richard B. Ashman | Variable angle spinal implant connection assembly |
US6699248B2 (en) * | 2002-05-09 | 2004-03-02 | Roger P. Jackson | Multiple diameter tangential set screw |
WO2004019755A2 (en) * | 2002-08-28 | 2004-03-11 | Ashman Richard B | Variable angle spinal implant connection assembly |
US7306602B2 (en) * | 2002-10-31 | 2007-12-11 | Depuy Actomed, Inc. | Snap-in washers and assemblies thereof |
US20040087952A1 (en) * | 2002-10-31 | 2004-05-06 | Amie Borgstrom | Universal polyaxial washer assemblies |
WO2004084742A1 (en) | 2003-03-24 | 2004-10-07 | Theken Surgical Llc | Spinal implant adjustment device |
US7270665B2 (en) * | 2003-06-11 | 2007-09-18 | Sdgi Holdings, Inc. | Variable offset spinal fixation system |
JP5170807B2 (en) * | 2003-08-08 | 2013-03-27 | ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング | Tightening device |
US7708764B2 (en) | 2003-11-10 | 2010-05-04 | Simonson Peter M | Method for creating an artificial facet |
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 |
US7261715B2 (en) * | 2003-11-24 | 2007-08-28 | Sdgi Holdings, Inc. | Grommet assembly |
US8097023B2 (en) * | 2003-11-24 | 2012-01-17 | Warsaw Orthopedic, Inc. | Grommet assembly |
US7678137B2 (en) * | 2004-01-13 | 2010-03-16 | Life Spine, Inc. | Pedicle screw constructs for spine fixation systems |
US7909852B2 (en) | 2004-03-31 | 2011-03-22 | Depuy Spine Sarl | Adjustable-angle spinal fixation element |
US20050228382A1 (en) * | 2004-04-12 | 2005-10-13 | Marc Richelsoph | Screw and rod fixation assembly and device |
US7377922B2 (en) | 2004-04-15 | 2008-05-27 | Warsaw Orthopedic, Inc. | Transfer ring for offset tapered 3D connector |
US7938848B2 (en) * | 2004-06-09 | 2011-05-10 | Life Spine, Inc. | Spinal fixation system |
US7744635B2 (en) * | 2004-06-09 | 2010-06-29 | Spinal Generations, Llc | Spinal fixation system |
US8021398B2 (en) * | 2004-06-09 | 2011-09-20 | Life Spine, Inc. | Spinal fixation system |
US8114158B2 (en) | 2004-08-03 | 2012-02-14 | Kspine, Inc. | Facet device and method |
US7572280B2 (en) * | 2004-10-05 | 2009-08-11 | Warsaw Orthopedic, Inc. | Multi-axial anchor assemblies for spinal implants and methods |
US7722654B2 (en) * | 2004-10-05 | 2010-05-25 | Warsaw Orthopedic, Inc. | Spinal implants with multi-axial anchor assembly and methods |
US7794477B2 (en) * | 2004-10-05 | 2010-09-14 | Warsaw Orthopedic, Inc. | Spinal implants and methods with extended multi-axial anchor assemblies |
US20060278781A1 (en) * | 2004-11-11 | 2006-12-14 | Mar-Lin Medical, Llc. | Medical device mount |
DE102004056091B8 (en) * | 2004-11-12 | 2007-04-26 | Aesculap Ag & Co. Kg | Orthopedic fixation device and orthopedic fixation system |
WO2006058221A2 (en) | 2004-11-24 | 2006-06-01 | Abdou Samy M | Devices and methods for inter-vertebral orthopedic device placement |
US7896905B2 (en) * | 2005-02-09 | 2011-03-01 | David Lee | Bone fixation apparatus |
US7794481B2 (en) | 2005-04-22 | 2010-09-14 | Warsaw Orthopedic, Inc. | Force limiting coupling assemblies for spinal implants |
US8758343B2 (en) | 2005-04-27 | 2014-06-24 | DePuy Synthes Products, LLC | Bone fixation apparatus |
US7850715B2 (en) * | 2005-04-29 | 2010-12-14 | Warsaw Orthopedic Inc. | Orthopedic implant apparatus |
US7585312B2 (en) * | 2005-04-29 | 2009-09-08 | Warsaw Orthopedic, Inc. | Spinal stabilization apparatus and method |
US8128665B2 (en) * | 2005-04-29 | 2012-03-06 | Warsaw Orthopedic, Inc. | Orthopedic implant apparatus |
US7695499B2 (en) * | 2005-04-29 | 2010-04-13 | Warsaw Orthopedic, Inc. | System, devices and method for augmenting existing fusion constructs |
US7625394B2 (en) * | 2005-08-05 | 2009-12-01 | Warsaw Orthopedic, Inc. | Coupling assemblies for spinal implants |
US7628799B2 (en) * | 2005-08-23 | 2009-12-08 | Aesculap Ag & Co. Kg | Rod to rod connector |
US7699873B2 (en) * | 2005-11-23 | 2010-04-20 | Warsaw Orthopedic, Inc. | Spinous process anchoring systems and methods |
US7517359B2 (en) | 2005-12-20 | 2009-04-14 | Sdgi Holdings, Inc. | Vertebral rod assemblies and methods |
US7575587B2 (en) * | 2005-12-30 | 2009-08-18 | Warsaw Orthopedic, Inc. | Top-tightening side-locking spinal connector assembly |
US8663287B2 (en) * | 2006-01-10 | 2014-03-04 | Life Spine, Inc. | Pedicle screw constructs and spinal rod attachment assemblies |
US7585299B2 (en) * | 2006-02-17 | 2009-09-08 | Warsaw Orthopedic, Inc. | Dorsal adjusting spinal connector assembly |
US7753940B2 (en) * | 2006-04-05 | 2010-07-13 | Warsaw Orthopedic, Inc. | Lateral connector assembly |
WO2007114834A1 (en) * | 2006-04-05 | 2007-10-11 | Dong Myung Jeon | Multi-axial, double locking bone screw assembly |
CA2648204C (en) | 2006-04-11 | 2014-07-22 | Synthes (U.S.A.) | Minimally invasive fixation system |
US8043337B2 (en) | 2006-06-14 | 2011-10-25 | Spartek Medical, Inc. | Implant system and method to treat degenerative disorders of the spine |
US8388660B1 (en) | 2006-08-01 | 2013-03-05 | Samy Abdou | Devices and methods for superior fixation of orthopedic devices onto the vertebral column |
US7922746B2 (en) * | 2006-08-31 | 2011-04-12 | Warsaw Orthopedic, Inc. | Spinal rod extenders and methods of use |
US8167910B2 (en) | 2006-10-16 | 2012-05-01 | Innovative Delta Technology Llc | Bone screw and associated assembly and methods of use thereof |
US7744632B2 (en) * | 2006-12-20 | 2010-06-29 | Aesculap Implant Systems, Inc. | Rod to rod connector |
EP2117451A1 (en) * | 2006-12-29 | 2009-11-18 | Zimmer Spine Austin, Inc. | Spinal stabilization systems and methods |
US20080172092A1 (en) * | 2007-01-12 | 2008-07-17 | Paul Edward Kraemer | System and method for spinal instrumentation |
US9962194B2 (en) | 2007-01-15 | 2018-05-08 | Innovative Delta Technology, Llc | Polyaxial spinal stabilizer connector and methods of use thereof |
US7794478B2 (en) | 2007-01-15 | 2010-09-14 | Innovative Delta Technology, Llc | Polyaxial cross connector and methods of use thereof |
US7931676B2 (en) * | 2007-01-18 | 2011-04-26 | Warsaw Orthopedic, Inc. | Vertebral stabilizer |
US8197517B1 (en) | 2007-05-08 | 2012-06-12 | Theken Spine, Llc | Frictional polyaxial screw assembly |
US20080281362A1 (en) * | 2007-05-09 | 2008-11-13 | Jeremy Lemoine | Device and system for cranial support |
US8142480B2 (en) | 2007-06-05 | 2012-03-27 | Spartek Medical, Inc. | Dynamic stabilization and motion preservation spinal implantation system with horizontal deflection rod and articulating vertical rods |
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 |
US8002803B2 (en) | 2007-06-05 | 2011-08-23 | Spartek Medical, Inc. | Deflection rod system for a spine implant including an inner rod and an outer shell 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 |
US8070776B2 (en) | 2007-06-05 | 2011-12-06 | Spartek Medical, Inc. | Deflection rod system for use with a vertebral fusion implant for dynamic stabilization and motion preservation spinal implantation system and method |
US8092501B2 (en) | 2007-06-05 | 2012-01-10 | Spartek Medical, Inc. | Dynamic spinal rod and method for dynamic stabilization of the spine |
US8048115B2 (en) | 2007-06-05 | 2011-11-01 | Spartek Medical, Inc. | Surgical tool and method for implantation of a dynamic bone anchor |
US8021396B2 (en) | 2007-06-05 | 2011-09-20 | Spartek Medical, Inc. | Configurable dynamic spinal rod and method for dynamic stabilization of the spine |
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 |
WO2009011929A1 (en) * | 2007-07-19 | 2009-01-22 | Synthes (U.S.A.) | Clamps used for interconnecting a bone anchor to a rod |
US20090076549A1 (en) * | 2007-09-17 | 2009-03-19 | Warsaw Orthopedic, Inc. | Orthopedic implant system |
US8147519B2 (en) * | 2007-10-09 | 2012-04-03 | Warsaw Orthopedic, Inc. | Variable angle rod connectors and the methods of use |
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 |
US8057515B2 (en) | 2008-02-26 | 2011-11-15 | Spartek Medical, Inc. | Load-sharing anchor having a deflectable post and centering 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 |
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 |
US8016861B2 (en) | 2008-02-26 | 2011-09-13 | Spartek Medical, Inc. | Versatile polyaxial connector assembly 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 |
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 |
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 |
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 |
US9060813B1 (en) | 2008-02-29 | 2015-06-23 | Nuvasive, Inc. | Surgical fixation system and related methods |
US20090254125A1 (en) * | 2008-04-03 | 2009-10-08 | Daniel Predick | Top Loading Polyaxial Spine Screw Assembly With One Step Lockup |
US20100049253A1 (en) * | 2008-08-20 | 2010-02-25 | Warsaw Orthopedic, Inc. | Bottom loading connector for attaching a spinal rod to a vertebral member |
US8147523B2 (en) * | 2008-09-09 | 2012-04-03 | Warsaw Orthopedic, Inc. | Offset vertebral rod connector |
US8066746B2 (en) | 2008-12-23 | 2011-11-29 | Globus Medical, Inc. | Variable angle connection assembly |
US8828058B2 (en) | 2008-11-11 | 2014-09-09 | Kspine, Inc. | Growth directed vertebral fixation system with distractible connector(s) and apical control |
EP2376009B1 (en) * | 2008-12-24 | 2012-11-21 | Synthes GmbH | Spline drive for threaded post-type bone anchors |
US8357182B2 (en) | 2009-03-26 | 2013-01-22 | Kspine, Inc. | Alignment system with longitudinal support features |
EP2432407B1 (en) | 2009-05-20 | 2013-04-17 | Synthes GmbH | Patient-mounted retractor |
US20100318129A1 (en) * | 2009-06-16 | 2010-12-16 | Kspine, Inc. | Deformity alignment system with reactive force balancing |
US8876869B1 (en) | 2009-06-19 | 2014-11-04 | Nuvasive, Inc. | Polyaxial bone screw assembly |
US8506598B1 (en) | 2009-06-26 | 2013-08-13 | Nuvasive, Inc. | Anchors for spinal fixation and correcting spinal deformity |
US9168071B2 (en) | 2009-09-15 | 2015-10-27 | K2M, Inc. | Growth modulation system |
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 |
US8070781B2 (en) | 2010-01-12 | 2011-12-06 | Globus Medical, Inc. | Offset variable angle connection assembly |
US20110184412A1 (en) * | 2010-01-28 | 2011-07-28 | Warsaw Orthopedic, Inc. | Pre-Assembled Construct With One or More Non-Rotating Connectors for Insertion Into a Patient |
US8317837B2 (en) * | 2010-02-05 | 2012-11-27 | Warsaw Orthopedic, Inc. | Connector and method |
US8617216B2 (en) * | 2010-04-05 | 2013-12-31 | David L. Brumfield | Fully-adjustable bone fixation device |
US8535318B2 (en) | 2010-04-23 | 2013-09-17 | DePuy Synthes Products, LLC | Minimally invasive instrument set, devices and related methods |
US20110307018A1 (en) | 2010-06-10 | 2011-12-15 | Spartek Medical, Inc. | Adaptive spinal rod and methods for stabilization of the spine |
US9084634B1 (en) | 2010-07-09 | 2015-07-21 | Theken Spine, Llc | Uniplanar screw |
US10603083B1 (en) | 2010-07-09 | 2020-03-31 | Theken Spine, Llc | Apparatus and method for limiting a range of angular positions of a screw |
US9198692B1 (en) | 2011-02-10 | 2015-12-01 | Nuvasive, Inc. | Spinal fixation anchor |
US9387013B1 (en) | 2011-03-01 | 2016-07-12 | Nuvasive, Inc. | Posterior cervical fixation system |
US9314274B2 (en) | 2011-05-27 | 2016-04-19 | DePuy Synthes Products, Inc. | Minimally invasive spinal fixation system including vertebral alignment features |
JP6158176B2 (en) | 2011-06-03 | 2017-07-05 | ケイツーエム インコーポレイテッドK2M,Inc. | Spine correction system |
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 |
US8940032B2 (en) | 2011-10-26 | 2015-01-27 | Globus Medical, Inc. | Connection assembly |
US9468469B2 (en) | 2011-11-16 | 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 |
WO2014172632A2 (en) | 2011-11-16 | 2014-10-23 | Kspine, Inc. | Spinal correction and secondary stabilization |
US9451987B2 (en) | 2011-11-16 | 2016-09-27 | K2M, Inc. | System and method for spinal correction |
US8920472B2 (en) | 2011-11-16 | 2014-12-30 | Kspine, Inc. | Spinal correction and secondary stabilization |
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 |
US8828056B2 (en) | 2012-04-16 | 2014-09-09 | Aesculap Implant Systems, Llc | Rod to rod cross connector |
US8771319B2 (en) | 2012-04-16 | 2014-07-08 | Aesculap Implant Systems, Llc | Rod to rod cross connector |
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 |
US9468471B2 (en) | 2013-09-17 | 2016-10-18 | K2M, Inc. | Transverse coupler adjuster spinal correction systems and methods |
US9517089B1 (en) | 2013-10-08 | 2016-12-13 | Nuvasive, Inc. | Bone anchor with offset rod connector |
US9451994B1 (en) | 2015-06-19 | 2016-09-27 | Amendia, Inc. | Spinal implant revision device |
US10857003B1 (en) | 2015-10-14 | 2020-12-08 | Samy Abdou | Devices and methods for vertebral stabilization |
WO2017139782A1 (en) | 2016-02-12 | 2017-08-17 | Nuvasive, Inc. | Post-operatively adjustable angled rod |
US11446063B2 (en) | 2016-02-12 | 2022-09-20 | Nuvasive, Inc. | Post-operatively adjustable angled rod |
US10820929B2 (en) * | 2016-03-29 | 2020-11-03 | Globus Medical Inc. | Revision connectors, systems, and methods thereof |
US10413330B2 (en) | 2016-08-09 | 2019-09-17 | Warsaw Orthopedic, Inc. | Spinal implant system and method |
US10744000B1 (en) | 2016-10-25 | 2020-08-18 | Samy Abdou | Devices and methods for vertebral bone realignment |
US10973648B1 (en) | 2016-10-25 | 2021-04-13 | Samy Abdou | Devices and methods for vertebral bone realignment |
US10258386B2 (en) | 2017-06-15 | 2019-04-16 | Warsaw Orthopedic, Inc. | Spinal construct and method |
US10507043B1 (en) | 2017-10-11 | 2019-12-17 | Seaspine Orthopedics Corporation | Collet for a polyaxial screw assembly |
US11179248B2 (en) | 2018-10-02 | 2021-11-23 | Samy Abdou | Devices and methods for spinal implantation |
US11376046B1 (en) | 2021-02-01 | 2022-07-05 | Warsaw Orthopedic, Inc. | Spinal implant system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5261909A (en) | 1992-02-18 | 1993-11-16 | Danek Medical, Inc. | Variable angle screw for spinal implant system |
US5562662A (en) | 1993-01-04 | 1996-10-08 | Danek Medical Inc. | Spinal fixation system and method |
US5611800A (en) | 1994-02-15 | 1997-03-18 | Alphatec Manufacturing, Inc. | Spinal fixation system |
US5643263A (en) | 1995-08-14 | 1997-07-01 | Simonson; Peter Melott | Spinal implant connection assembly |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH683963A5 (en) | 1988-06-10 | 1994-06-30 | Synthes Ag | Internal fixation. |
US5254118A (en) | 1991-12-04 | 1993-10-19 | Srdjian Mirkovic | Three dimensional spine fixation system |
DE4200905A1 (en) | 1992-01-16 | 1993-07-22 | Heinrich Ulrich | IMPLANT FOR ALIGNMENT AND FIXING OF TWO BONES OR BONE PARTS TOGETHER, IN PARTICULAR SPONDYLODESE IMPLANT |
ZA937672B (en) | 1992-10-22 | 1994-05-16 | Danek Medical Inc | Spinal rod transverse connector for supporting vertebral fixation elements |
US5282801A (en) * | 1993-02-17 | 1994-02-01 | Danek Medical, Inc. | Top tightening clamp assembly for a spinal fixation system |
US5549607A (en) | 1993-02-19 | 1996-08-27 | Alphatec Manufacturing, Inc, | Apparatus for spinal fixation system |
US5634925A (en) * | 1993-02-19 | 1997-06-03 | Alphatec Manufacturing, Inc. | Apparatus and method for spinal fixation system |
US5403316A (en) | 1993-12-02 | 1995-04-04 | Danek Medical, Inc. | Triangular construct for spinal fixation |
DE9409123U1 (en) * | 1994-06-04 | 1994-09-01 | Howmedica Gmbh | Device for stabilizing or compressing or distracting sections of the spine |
US5562661A (en) | 1995-03-16 | 1996-10-08 | Alphatec Manufacturing Incorporated | Top tightening bone fixation apparatus |
US5688272A (en) * | 1995-03-30 | 1997-11-18 | Danek Medical, Inc. | Top-tightening transverse connector for a spinal fixation system |
US5645544A (en) | 1995-09-13 | 1997-07-08 | Danek Medical, Inc. | Variable angle extension rod |
US5693053A (en) | 1995-10-19 | 1997-12-02 | Sdgi Holdings, Inc. | Variable angle and transitional linking member |
US5976133A (en) * | 1997-04-23 | 1999-11-02 | Trustees Of Tufts College | External fixator clamp and system |
US5741255A (en) | 1996-06-05 | 1998-04-21 | Acromed Corporation | Spinal column retaining apparatus |
US6001098A (en) * | 1997-01-17 | 1999-12-14 | Howmedica Gmbh | Connecting element for spinal stabilizing system |
FR2762986B1 (en) * | 1997-05-07 | 1999-09-24 | Aesculap Jbs | OSTEOSYNTHESIS SYSTEM FOR VERTEBRAL ARTHRODESIS |
US5785711A (en) * | 1997-05-15 | 1998-07-28 | Third Millennium Engineering, Llc | Polyaxial pedicle screw having a through bar clamp locking mechanism |
US5947967A (en) * | 1997-10-22 | 1999-09-07 | Sdgt Holdings, Inc. | Variable angle connector |
US5976135A (en) * | 1997-12-18 | 1999-11-02 | Sdgi Holdings, Inc. | Lateral connector assembly |
-
1999
- 1999-04-21 US US09/296,104 patent/US6183473B1/en not_active Expired - Lifetime
-
2000
- 2000-03-28 US US09/536,530 patent/US6402749B1/en not_active Expired - Lifetime
- 2000-04-21 DE DE10084498T patent/DE10084498T1/en not_active Withdrawn
- 2000-04-21 AU AU46583/00A patent/AU4658300A/en not_active Abandoned
- 2000-04-21 WO PCT/US2000/010965 patent/WO2000062691A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5261909A (en) | 1992-02-18 | 1993-11-16 | Danek Medical, Inc. | Variable angle screw for spinal implant system |
US5562662A (en) | 1993-01-04 | 1996-10-08 | Danek Medical Inc. | Spinal fixation system and method |
US5611800A (en) | 1994-02-15 | 1997-03-18 | Alphatec Manufacturing, Inc. | Spinal fixation system |
US5643263A (en) | 1995-08-14 | 1997-07-01 | Simonson; Peter Melott | Spinal implant connection assembly |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8636783B2 (en) | 2006-12-29 | 2014-01-28 | Zimmer Spine, Inc. | Spinal stabilization systems and methods |
Also Published As
Publication number | Publication date |
---|---|
WO2000062691B1 (en) | 2000-12-14 |
US6183473B1 (en) | 2001-02-06 |
US6402749B1 (en) | 2002-06-11 |
AU4658300A (en) | 2000-11-02 |
DE10084498T1 (en) | 2002-05-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6183473B1 (en) | Variable angle connection assembly for a spinal implant system | |
CA2429035C (en) | Variable angle connection assembly for a spinal implant system | |
AU2002231231A1 (en) | Variable angle connection assembly for a spinal implant system | |
US6280445B1 (en) | Multi-axial bone anchor system | |
US5980521A (en) | Top-tightening transverse connector for a spinal fixation system | |
US7377922B2 (en) | Transfer ring for offset tapered 3D connector | |
CA2403057C (en) | Multi-axial bone anchor system | |
US5382248A (en) | System and method for stabilizing bone segments | |
US5928232A (en) | Spinal fixation system | |
US6648887B2 (en) | Variable angle spinal implant connection assembly | |
US5810817A (en) | Spinal therapy apparatus | |
EP0934027B1 (en) | Multi-axial bone screw assembly | |
US5693053A (en) | Variable angle and transitional linking member | |
EP0874594B1 (en) | Device for linking adjacent rods in spinal instrumentation | |
US5437670A (en) | Attachment plate for top-tightening clamp assembly in a spinal fixation system | |
US6709434B1 (en) | Spinal osteosynthesis device | |
EP0506420B1 (en) | Bone fixation apparatus | |
US9474554B2 (en) | Spinal rod cross connector | |
EP1161191B1 (en) | Spinal osteosynthesis instrumentation | |
US20050113835A1 (en) | Variable angle spinal implant connection assembly |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
AK | Designated states |
Kind code of ref document: B1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: B1 Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
B | Later publication of amended claims | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
RET | De translation (de og part 6b) |
Ref document number: 10084498 Country of ref document: DE Date of ref document: 20020516 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10084498 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |