CA2447844A1 - Snap-in washers and assemblies thereof - Google Patents
Snap-in washers and assemblies thereof Download PDFInfo
- Publication number
- CA2447844A1 CA2447844A1 CA002447844A CA2447844A CA2447844A1 CA 2447844 A1 CA2447844 A1 CA 2447844A1 CA 002447844 A CA002447844 A CA 002447844A CA 2447844 A CA2447844 A CA 2447844A CA 2447844 A1 CA2447844 A1 CA 2447844A1
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- CA
- Canada
- Prior art keywords
- washer
- arcuate
- washers
- bone
- bone anchor
- 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
- A61B17/7044—Screws or hooks combined with longitudinal elements which do not contact vertebrae also having plates, staples or washers bearing on the vertebrae
-
- 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
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8695—Washers
Abstract
This invention relates to an apparatus for spinal fixation, in particular, for joining a bone anchor with spinal stabilizers such as a spinal rod or spinal plate in a polyaxial fashion. The invention is also directed to polyaxial connectors which incorporate arcuate washers. The polyaxial features of this invention are achieved preferably with snap-in washers which minimize the numbers of parts that a surgeon may have to handle during surgery.
Description
SNAP-IN WASHERS AND ASSEMBLIES THEREOF
BACKGROUND OF THE INVENTION
s 1. Field of the Invention This invention relates to connecting devices for spinal fixation, in particular, for joining a bone anchor with spinal stabilizers such as a, spinal rod or spinal io plate in a polyaxial fashion.
BACKGROUND OF THE INVENTION
s 1. Field of the Invention This invention relates to connecting devices for spinal fixation, in particular, for joining a bone anchor with spinal stabilizers such as a, spinal rod or spinal io plate in a polyaxial fashion.
2. Related Art It is well know and practiced that when securing is and maintaining bones in a preferred alignment, a plurality of bone anchors may be attached to one or more bones and subsequently secured together in a desired orientation with a bone stabilizer. Examples of bone stabilizers include "longitudinal members," and in some 2o cases, "connectors" as is known in the art. That is, the longitudinal member (e.g. a rod or a plate) connects the bone anchors together, and (if needed), the connectors are used to secure the bone anchor to the longitudinal member. Accordingly, there are at least two criteria 2s that would be desirable to be satisfied when securing bones in a desired alignment using bone anchors and a bone stabilizer:
(i) it is desirable to attach each bone anchor to a bone in a manner that will inhibit movement of the anchor relative to the bone. Thus, the orientation of the bone anchor to its attached bone may be dependent on, e.g., s the bone configuration, density, and/or fractures therein;
(ii) the bone stabilizer must be attached to each bone anchor, and in particular, to an included shaft, in a manner so that the longitudinal member (of the bone to stabilizer) is oriented to effectively maintain the desired alignment of bones.
In order to satisfy the above criteria, it may be preferable that the shafts of the bone anchors are not parallel to each other and/or not perpendicular to the i5 longitudinal member when they are attached to their respective bones. Moreover, for each bone alignment procedure performed using bone anchors and bone stabilizers, the orientations of the shafts relative to one another and the longitudinal member may be ao substantially unique.
Accordingly, a preferable position of the longitudinal member can be compromised by the various orientations of the bone anchoring shafts, these various orientations due to, e.g., the preferred positions of 2s the anchors when they are secured to the bones. Thus, it is advantageous to have the ability to firmly secure such bone anchoring shafts to a bone position retainer, wherein the shafts may be at various orientations to the longitudinal member, i.e., in polyaxial or multi-angular orientations.
s U.S. Pat. No. 5,984,924 discloses such a bone to alignment system capable of multi-angular orientations with respect to the bone anchor and longitudinal member.
Through use of a system of concave or convex arcuate washers, the multi-angular orientations are achieved.
U.S. Pat. No. 6,315,779 discloses a multi-axial bone fixation implant having an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. The i5 stabilizer members are rectilinear in shape and do not include arcuate surfaces. The only use of washers disclosed are ones having an undercut within its oblong aperture on the top of the implant. The implant is locked by a nut and the washer atop the elongated ao member, the enlarged portion of a bone anchor is forced against an inside wall of the stabilizer, which is in turn locks against the elongated member. Disadvantages of this system are the large number of separate parts and that the washers can be cumbersome to use in that 25 they are not secured to the elongated member.
The present invention provides an advance in the art by minimizing a number of parts a surgeon has to handle during a surgical procedure while having the advantage of multiple orientations provided by use of the arcuate washers.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
to Fig. 1 depicts a bone anchor-spinal stabilizer connector of this invention;
Fig. 2 depicts another view of the bone anchor spinal stabilizer connector of Fig. 1 incorporating a washer;
Fig. 3 depicts one embodiment for the washers of this invention;
2o Fig. 4 depicts a cross-sectional side view of bone anchor-spinal stabilizer connector of this invention incorporating top and bottom washers;
Fig. 5 depicts a cross-sectional view of the band-clamp embodiment of this invention;
Fig. 6 depicts a resilient snap-in washer embodiment of this invention;
Fig. 7 depicts a cross-sectional view of the band-clamp embodiment of this invention incorporating the resilient snap-in washers;
Fig. 8 depicts a perspective view of a bone plate embodiment of this invention incorporating the resilient snap-in washers; and io Fig. 9 depicts a cross-sectional end view of the bone plate of Fig. 8.
SUMMARY OF THE INVENTION
i5 One embodiment of the invention is directed toward a connecting device for joining a spinal stabilizer with a bone anchor comprising:
a body comprising a bone anchor fastening portion and a spinal stabilizer fastening portion, wherein the 2o bone anchor fastening portion comprises an aperture for receiving and retaining a washer.
Another embodiment of the invention is directed toward a connecting device for joining a spinal 2s stabilizer with a bone anchor comprising:
a body comprising a clamp with two projecting arm portians, the clamp portion for fastening a spinal stabilizer in the form of a rod and the arm partions having apertures for fastening the bone anchor.
Another embodiment of the invention relates to a s connecting device for joining two bone anchors comprising a plate having an aperture for receiving and retaining a washer.
Yet another embodiment of the invention comprises a io washer comprising a concave or convex arcuate portion and a fastening portion, wherein the fastening portion comprises flexible projections for receipt and retention in a channel.
15 Another embodiment of this invention relates to a systems for spinal stabilization comprising a spinal. rod;
a bone anchor comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and 2o second portions, comprising arcuate surfaces for polyaxial engagement with a connectar; and a locking nut;
wherein, the bone anchor and rod are joined by the connecting devices as hereinafter described and claimed.
Additionally, systems of this invention may comprise at 2s least two bone anchors as described above joined by a plate having an aperture for receiving and retaining a washer.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE
INVENTION
s Generally, this invention deals with devices for spinal fixation especially to those used particularly for joining a bone anchor with spinal stabilizers such as a spinal rod or spinal plate in a polyaxial fashion.
The invention is also directed to polyaxial connectors to which incorporate arcuate washers. The 'polyaxial features of this invention are achieved preferably with snap-in washers which minimize the numbers of parts that a surgeon may have to handle during surgery.
i5 Fig. 1 depicts spinal stabilizer-bone anchor connector 1. Connector 1 comprises spinal stabilizer portion 20 and bone anchor portion 10. Spinal stabilizer portion 20 comprises a stabilizer receiving throughbore 22 and a set screw bore 24. Thus an attaching to a 2o stabilizer, a stabilizer trod) will pass through bore 22 and_be secured into place by the locking of a set screw through bore 22 ~by securely contacting the stabilizer.
Portion 10 of the device includes aperture 12 for receiving a head of a bone anchor and channels 14 for 25 receipt of washers. The bone anchors contemplated for use of this invention are those well known in the art which generally comprise a bone .engaging threaded first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with the connector, for example, as depicted in Fig. 4 of U.S. Pat. No. 5,984,924 or in s Fig. 7 of U.S. Pat. No. 6,315,779, the disclosures of which are incorporated by reference in their entirety.
Fig. 2 depicts the connector 1 incorporating washer 30.
Fig. 3 depicts washer 30 comprising aperture 32 for receiving the head of a bone anchor. Projections 34 are sized to engage channels 14. Optionally spacers 36 (shown in phantom) may be employed to provide spacing between is the body of the washer and portion 10 of connector 1.
Fig. 4 is a cross-sectional depiction of connector 1. Portion 10 comprises channels 14 which receive projection 32 of washers 30. Preferably projections 32 of 2o washers 30 are biased to securely fit in channels 14.
Fig. 5 depicts the band clamp 40 embodiment of this invention. Clamp 40 comprises two projecting arm portions 42 with aperture 44 for engaging a spinal 2s stabilizer in the form of a rod and arm portions 42 having apertures 46 for fastening to a bone anchor. Each arm portion 42 comprises channels 48 for receiving projections of washers (not shown).
Fig. 6 depicts washer 50 suitable for use with band clamp 40. Washer 50 comprises throughbore 52, concave surface 54 and projects 56 which engage channels 48 (not s shown) of band clamp 40.
Fig. 7 depicts the assembled clamp 40 with washers 50 engaged in channels 48.
io Fig. 8 depicts the bone plate 70 embodiment of this invention. Plate 70 comprises aperture 72 for receiving and retaining washers 50 in channels 74. In this figure, both top and .bottom washers are depicted. Engagement of washers 50 into channels 74 are as described for the band is clamp embodiment of this invention. Furthermore, bone plate 70 would actually have at least two additional washers (one top and one bottom? for a total of 4 resilient washers so that connection between at least 2 bone anchors may be made.
. Fig. 9 depicts a cross-sectional end view of bone plate 70 shown in Fig. 8. Referring to Fig. 9, channels 74 for receiving washers 50 are more clearly seen.
Although washers 30 and 50 of this invention have been depicted with concave surfaces, it is apparent to one skilled in the art that washers having other arcuate surfaces, such as convex surfaces, may also be used _ l depending on the nature of engagement with the corresponding bone anchor and locking nut such as through well know bone anchors as depicted, for example, in U. S-.
Pat. No. 5,984,924 or in U.S. Pat. No. 6,315,779.
Also the invention relates to systems for spinal stabilization comprising a spinal rod; a bone anchor comprising a bone engaging first portion, a machine io threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, ' comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut used in combination with the connecting devices of this i5 invention as described above. Additional systems of this invention include a system for spinal stabilization comprising at least two bone anchors comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, 2o intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut, wherein, the bone anchors axe joined by the connecting device comprising a plate having an aperture for receiving and retaining a 25 washer.
It should be understood that the foregoing disclosure and description of the present invention are illustrative and explanatory thereof and various changes in the size, shape and materials as well as in the s description of the preferred embodiment may be made without departing from the spirit of the invention.
(i) it is desirable to attach each bone anchor to a bone in a manner that will inhibit movement of the anchor relative to the bone. Thus, the orientation of the bone anchor to its attached bone may be dependent on, e.g., s the bone configuration, density, and/or fractures therein;
(ii) the bone stabilizer must be attached to each bone anchor, and in particular, to an included shaft, in a manner so that the longitudinal member (of the bone to stabilizer) is oriented to effectively maintain the desired alignment of bones.
In order to satisfy the above criteria, it may be preferable that the shafts of the bone anchors are not parallel to each other and/or not perpendicular to the i5 longitudinal member when they are attached to their respective bones. Moreover, for each bone alignment procedure performed using bone anchors and bone stabilizers, the orientations of the shafts relative to one another and the longitudinal member may be ao substantially unique.
Accordingly, a preferable position of the longitudinal member can be compromised by the various orientations of the bone anchoring shafts, these various orientations due to, e.g., the preferred positions of 2s the anchors when they are secured to the bones. Thus, it is advantageous to have the ability to firmly secure such bone anchoring shafts to a bone position retainer, wherein the shafts may be at various orientations to the longitudinal member, i.e., in polyaxial or multi-angular orientations.
s U.S. Pat. No. 5,984,924 discloses such a bone to alignment system capable of multi-angular orientations with respect to the bone anchor and longitudinal member.
Through use of a system of concave or convex arcuate washers, the multi-angular orientations are achieved.
U.S. Pat. No. 6,315,779 discloses a multi-axial bone fixation implant having an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. The i5 stabilizer members are rectilinear in shape and do not include arcuate surfaces. The only use of washers disclosed are ones having an undercut within its oblong aperture on the top of the implant. The implant is locked by a nut and the washer atop the elongated ao member, the enlarged portion of a bone anchor is forced against an inside wall of the stabilizer, which is in turn locks against the elongated member. Disadvantages of this system are the large number of separate parts and that the washers can be cumbersome to use in that 25 they are not secured to the elongated member.
The present invention provides an advance in the art by minimizing a number of parts a surgeon has to handle during a surgical procedure while having the advantage of multiple orientations provided by use of the arcuate washers.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
to Fig. 1 depicts a bone anchor-spinal stabilizer connector of this invention;
Fig. 2 depicts another view of the bone anchor spinal stabilizer connector of Fig. 1 incorporating a washer;
Fig. 3 depicts one embodiment for the washers of this invention;
2o Fig. 4 depicts a cross-sectional side view of bone anchor-spinal stabilizer connector of this invention incorporating top and bottom washers;
Fig. 5 depicts a cross-sectional view of the band-clamp embodiment of this invention;
Fig. 6 depicts a resilient snap-in washer embodiment of this invention;
Fig. 7 depicts a cross-sectional view of the band-clamp embodiment of this invention incorporating the resilient snap-in washers;
Fig. 8 depicts a perspective view of a bone plate embodiment of this invention incorporating the resilient snap-in washers; and io Fig. 9 depicts a cross-sectional end view of the bone plate of Fig. 8.
SUMMARY OF THE INVENTION
i5 One embodiment of the invention is directed toward a connecting device for joining a spinal stabilizer with a bone anchor comprising:
a body comprising a bone anchor fastening portion and a spinal stabilizer fastening portion, wherein the 2o bone anchor fastening portion comprises an aperture for receiving and retaining a washer.
Another embodiment of the invention is directed toward a connecting device for joining a spinal 2s stabilizer with a bone anchor comprising:
a body comprising a clamp with two projecting arm portians, the clamp portion for fastening a spinal stabilizer in the form of a rod and the arm partions having apertures for fastening the bone anchor.
Another embodiment of the invention relates to a s connecting device for joining two bone anchors comprising a plate having an aperture for receiving and retaining a washer.
Yet another embodiment of the invention comprises a io washer comprising a concave or convex arcuate portion and a fastening portion, wherein the fastening portion comprises flexible projections for receipt and retention in a channel.
15 Another embodiment of this invention relates to a systems for spinal stabilization comprising a spinal. rod;
a bone anchor comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and 2o second portions, comprising arcuate surfaces for polyaxial engagement with a connectar; and a locking nut;
wherein, the bone anchor and rod are joined by the connecting devices as hereinafter described and claimed.
Additionally, systems of this invention may comprise at 2s least two bone anchors as described above joined by a plate having an aperture for receiving and retaining a washer.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE
INVENTION
s Generally, this invention deals with devices for spinal fixation especially to those used particularly for joining a bone anchor with spinal stabilizers such as a spinal rod or spinal plate in a polyaxial fashion.
The invention is also directed to polyaxial connectors to which incorporate arcuate washers. The 'polyaxial features of this invention are achieved preferably with snap-in washers which minimize the numbers of parts that a surgeon may have to handle during surgery.
i5 Fig. 1 depicts spinal stabilizer-bone anchor connector 1. Connector 1 comprises spinal stabilizer portion 20 and bone anchor portion 10. Spinal stabilizer portion 20 comprises a stabilizer receiving throughbore 22 and a set screw bore 24. Thus an attaching to a 2o stabilizer, a stabilizer trod) will pass through bore 22 and_be secured into place by the locking of a set screw through bore 22 ~by securely contacting the stabilizer.
Portion 10 of the device includes aperture 12 for receiving a head of a bone anchor and channels 14 for 25 receipt of washers. The bone anchors contemplated for use of this invention are those well known in the art which generally comprise a bone .engaging threaded first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with the connector, for example, as depicted in Fig. 4 of U.S. Pat. No. 5,984,924 or in s Fig. 7 of U.S. Pat. No. 6,315,779, the disclosures of which are incorporated by reference in their entirety.
Fig. 2 depicts the connector 1 incorporating washer 30.
Fig. 3 depicts washer 30 comprising aperture 32 for receiving the head of a bone anchor. Projections 34 are sized to engage channels 14. Optionally spacers 36 (shown in phantom) may be employed to provide spacing between is the body of the washer and portion 10 of connector 1.
Fig. 4 is a cross-sectional depiction of connector 1. Portion 10 comprises channels 14 which receive projection 32 of washers 30. Preferably projections 32 of 2o washers 30 are biased to securely fit in channels 14.
Fig. 5 depicts the band clamp 40 embodiment of this invention. Clamp 40 comprises two projecting arm portions 42 with aperture 44 for engaging a spinal 2s stabilizer in the form of a rod and arm portions 42 having apertures 46 for fastening to a bone anchor. Each arm portion 42 comprises channels 48 for receiving projections of washers (not shown).
Fig. 6 depicts washer 50 suitable for use with band clamp 40. Washer 50 comprises throughbore 52, concave surface 54 and projects 56 which engage channels 48 (not s shown) of band clamp 40.
Fig. 7 depicts the assembled clamp 40 with washers 50 engaged in channels 48.
io Fig. 8 depicts the bone plate 70 embodiment of this invention. Plate 70 comprises aperture 72 for receiving and retaining washers 50 in channels 74. In this figure, both top and .bottom washers are depicted. Engagement of washers 50 into channels 74 are as described for the band is clamp embodiment of this invention. Furthermore, bone plate 70 would actually have at least two additional washers (one top and one bottom? for a total of 4 resilient washers so that connection between at least 2 bone anchors may be made.
. Fig. 9 depicts a cross-sectional end view of bone plate 70 shown in Fig. 8. Referring to Fig. 9, channels 74 for receiving washers 50 are more clearly seen.
Although washers 30 and 50 of this invention have been depicted with concave surfaces, it is apparent to one skilled in the art that washers having other arcuate surfaces, such as convex surfaces, may also be used _ l depending on the nature of engagement with the corresponding bone anchor and locking nut such as through well know bone anchors as depicted, for example, in U. S-.
Pat. No. 5,984,924 or in U.S. Pat. No. 6,315,779.
Also the invention relates to systems for spinal stabilization comprising a spinal rod; a bone anchor comprising a bone engaging first portion, a machine io threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, ' comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut used in combination with the connecting devices of this i5 invention as described above. Additional systems of this invention include a system for spinal stabilization comprising at least two bone anchors comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, 2o intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut, wherein, the bone anchors axe joined by the connecting device comprising a plate having an aperture for receiving and retaining a 25 washer.
It should be understood that the foregoing disclosure and description of the present invention are illustrative and explanatory thereof and various changes in the size, shape and materials as well as in the s description of the preferred embodiment may be made without departing from the spirit of the invention.
Claims (33)
1. An connecting device for joining a spinal stabilizer with a bone anchor comprising:
a) a body comprising a bone anchor fastening portion and a spinal stabilizer fastening portion, wherein the bone anchor fastening portion comprises an aperture for receiving and retaining a washer.
a) a body comprising a bone anchor fastening portion and a spinal stabilizer fastening portion, wherein the bone anchor fastening portion comprises an aperture for receiving and retaining a washer.
2. The device of claim 1, wherein the spinal stabilizer fastening portion is a body with a bore for receiving a rod.
3. The device of claim 2, wherein the aperture of bone anchor fastening portion is oblong.
4. The device of claim 3, wherein the bone anchor fastening portion comprises a channel on the inside of the aperture, the channel sized to receive and engage a snap-in washer.
5. The device of claim 4, wherein the washer is arcuate.
6. The device of claim 5, wherein the washer is concave arcuate.
7. The device of claim 5, wherein the washer is convex arcuate.
8. The device of claim 4, wherein the bone anchor fastening portion comprises two channels on the inside of the aperture, each channel sized to receive and engage snap-in washers on the top side and bottom side of the bone anchor fastening portion.
9. The device of claim 8, wherein at least one washer is arcuate.
10. The device of claim 9, wherein the washer is concave arcuate.
11. The device of claim 9, wherein the washer is convex arcuate.
12. The device of claim 1, wherein the body comprises a clamp with two projecting arm portions, the clamp portion for fastening a spinal stabilizer in the form of a rod and the arm portions having apertures for fastening the bone anchor.
13. The device of claim 12, wherein the apertures of the bone anchor fastening portion are oblong.
14. The device of claim 13, wherein the apertures comprise channels on the inside of each aperture, the channels sized to receive and engage a snap-in washer.
15. The device of claim 14, wherein at least one of the washers is arcuate.
16. The device of claim 15, wherein the washer is concave arcuate.
17. The device of claim 15, wherein the washer is convex arcuate.
18. The device of claim 12, wherein both washers are arcuate.
19. The device of claim 18, wherein both washers are concave arcuate.
20. The device of claim 19, wherein both washers are convex arcuate.
21. A connecting device for connecting two bone anchors comprising a plate having an aperture for receiving and retaining a washer.
22. The device of claim 21, wherein the aperture of the date is oblong.
23. The device of claim 22, wherein the aperture comprises a channel on the inside of the aperture, the channel sized to receive and engage a snap-in washer.
24. The device of claim 23, wherein the washer is arcuate.
25. The device of claim 24, wherein the washer is concave arcuate.
26. The device of claim 24, wherein the washer is convex arcuate.
27. The device of claim 21, the plate comprises two channels on the inside of the aperture, each channel sized to receive and engage snap-in washers on the top side and bottom side of the plate.
28. The device of claim 27, wherein both washers are concave arcuate.
29. The device of claim 27, wherein both washers are convex arcuate.
30. The device of claim 27, wherein one washer is concave arcuate and the other washer is convex arcuate.
31. A washer comprising a concave or convex arcuate portion and a fastening portion, wherein the fastening portion comprises flexible projections for receipt and retention in a channel.
32. A system for spinal stabilization comprising a spinal rod; a bone anchor comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut, wherein, the bone anchor and rod are joined by the connecting devices of claims 1 or 12.
33. A system for spinal stabilization comprising at least two bone anchors comprising a bone engaging first portion, a machine threaded second portion for engaging a locking nut, and a third portion, intermediate to the first and second portions, comprising arcuate surfaces for polyaxial engagement with a connector; and a locking nut, wherein, the bone anchors are joined by the connecting device of claim 21.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/285,055 | 2002-10-31 | ||
| US10/285,055 US7306602B2 (en) | 2002-10-31 | 2002-10-31 | Snap-in washers and assemblies thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2447844A1 true CA2447844A1 (en) | 2004-04-30 |
Family
ID=32107601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002447844A Abandoned CA2447844A1 (en) | 2002-10-31 | 2003-10-31 | Snap-in washers and assemblies thereof |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7306602B2 (en) |
| EP (1) | EP1417935B1 (en) |
| JP (1) | JP2004148125A (en) |
| AT (1) | ATE410964T1 (en) |
| AU (1) | AU2003257899B2 (en) |
| CA (1) | CA2447844A1 (en) |
| DE (1) | DE60324079D1 (en) |
| ES (1) | ES2312728T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7704270B2 (en) | 2004-12-22 | 2010-04-27 | Stryker Spine | Variable offset connectors and bone fixation methods |
Families Citing this family (117)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
| US8292926B2 (en) | 2005-09-30 | 2012-10-23 | Jackson Roger P | Dynamic stabilization connecting member with elastic core and outer sleeve |
| US10729469B2 (en) | 2006-01-09 | 2020-08-04 | Roger P. Jackson | Flexible spinal stabilization assembly with spacer having off-axis core member |
| US10258382B2 (en) | 2007-01-18 | 2019-04-16 | Roger P. Jackson | Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord |
| US7862587B2 (en) | 2004-02-27 | 2011-01-04 | Jackson Roger P | Dynamic stabilization assemblies, tool set and method |
| US8353932B2 (en) | 2005-09-30 | 2013-01-15 | Jackson Roger P | Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member |
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- 2003-10-30 DE DE60324079T patent/DE60324079D1/en not_active Expired - Lifetime
- 2003-10-30 ES ES03256871T patent/ES2312728T3/en not_active Expired - Lifetime
- 2003-10-30 EP EP03256871A patent/EP1417935B1/en not_active Expired - Lifetime
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Also Published As
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| JP2004148125A (en) | 2004-05-27 |
| AU2003257899B2 (en) | 2008-08-21 |
| EP1417935B1 (en) | 2008-10-15 |
| EP1417935A2 (en) | 2004-05-12 |
| DE60324079D1 (en) | 2008-11-27 |
| EP1417935A3 (en) | 2005-08-03 |
| US20040087949A1 (en) | 2004-05-06 |
| US7306602B2 (en) | 2007-12-11 |
| AU2003257899A1 (en) | 2004-05-20 |
| ATE410964T1 (en) | 2008-10-15 |
| ES2312728T3 (en) | 2009-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |