CA2516791A1 - Adjustable rod and connector device and method of use - Google Patents

Adjustable rod and connector device and method of use Download PDF

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Publication number
CA2516791A1
CA2516791A1 CA002516791A CA2516791A CA2516791A1 CA 2516791 A1 CA2516791 A1 CA 2516791A1 CA 002516791 A CA002516791 A CA 002516791A CA 2516791 A CA2516791 A CA 2516791A CA 2516791 A1 CA2516791 A1 CA 2516791A1
Authority
CA
Canada
Prior art keywords
rod member
implant
tightening
connector
bone
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.)
Granted
Application number
CA002516791A
Other languages
French (fr)
Other versions
CA2516791C (en
Inventor
Stephen Ritland
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Individual
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2516791A1 publication Critical patent/CA2516791A1/en
Application granted granted Critical
Publication of CA2516791C publication Critical patent/CA2516791C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two screws or hooks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7075—Interfitted members including discrete retainer
    • Y10T403/7077—Interfitted members including discrete retainer for telescoping members

Abstract

A low-profile surgical rod implant device (10) is provided that allows the length of a rod spanning two bone screws to be adjusted at the time of implantation. In a separate aspect of the invention, the rod implant device can be secured by tightening and securing an end (24) of the rod implant device at one of the bone screws (34). Embodiments are provided for use with polyaxial pedicle screws and substantially straight shank pedicle screws in spinal applications. In a separate aspect of the invention, a bone screw connector (114) having an interference type fit is also provided. A method for implanting the device is also provided.

Claims (53)

1. A spinal rod implant for spanning at least one intervertebral disc, the implant interconnectable to a first vertebra using a first pedicle screw and to a second vertebra using a second pedicle screw, the first pedicle screw separated from the second pedicle screw by a bridge distance, the implant comprising:
a first rod member for interconnecting to the first vertebra, said first rod member including a beam, said beam having an effective length shorter than the bridge distance;
a second rod member for interconnecting to the second vertebra, said second rod member including a clamp sized to receive at least a portion of said beam, said clamp having an effective length shorter than the bridge distance; and means for tightening said clamp to create a force to secure said beam within said clamp.
2. The implant as claimed in Claim 1, wherein said clamp includes an interior hollow chamber for receiving said at least a portion of said beam.
3. The implant as claimed in Claim 1, wherein said clamp is of one-piece construction.
4. The implant as cleaned in Claim 1, wherein said clamp includes a deformable upper arm and wherein said means for tightening at least partially compresses said upper arm against said beam.
5. The implant as claimed in Claim 4, wherein said clamp further includes a lower arm wherein said means for tightening at least partially compresses said beam against said lower arm.
6. The implant as claimed in Claim 5, wherein said clamp further includes a slot, wherein said slot bisects a portion of said clamp and wherein said upper arm is spaced apart from said lower arm.
7. The implant as claimed in Claim 1, wherein said clamp further includes an aperture for receiving said beam.
8. The implant as claimed in Claim 7, wherein said clamp further includes a notch spaced apart from said aperture.
9. The implant as claimed in Claim 7, wherein said aperture has a circular shape.
10. The implant as claimed in Claim 7, wherein said aperture has non-circular shape.
11. The implant as claimed in Claim 1, wherein said beam has a circular cross section.
12. The implant as claimed in Claim 1, wherein said beam has a non-circular cross section.
13. The implant as claimed in Claim 1, wherein said first rod member has a longitudinal axis substantially coincident with a longitudinal axis of said second rod member.
14. The implant as claimed in Claim 1, wherein said means for tightening does not include a set screw.
15. The implant as claimed in Claim 1, wherein said means for tightening comprises an end connector operatively associated with the second pedicle screw.
16. A surgical implant comprising:
a first rod member including a beam;
a second rod member including an opening sued to circumferentially receive said beam, said second rod member including an interior hollow chamber for longitudinally receiving at least a portion of said beam, said second rod member including an upper arm and an opposing lower arm, said upper arm and said lower arm spaced apart by a slot wherein said slot is contiguous with said interior hollow chamber, and wherein said upper arm is moveable to contact said beam and compress said beam between said upper ann and said lower arm; and means for tightening said second rod member to secure said beam within said second rod member.
17. The implant as claimed in Claim 16, wherein said beam has a longitudinal axis substantially coincident with a longitudinal axis of said second rod member.
18. The implant as claimed in Claim 16, wherein said second rod member is of one-piece construction.
19. The implant as claimed in Claim 16, wherein said second rod member further includes a notch spaced apart from said opening.
20. The implant as claimed in Claim 16, wherein said opening has a circular shape.
21. The implant as claimed in Claim 16, wherein said opening has non-circular shape.
22. The implant as claimed in Claim 16, wherein said beam has a circular cross section.
23. The implant as claimed in Claim 16, wherein said beam has a non-circular cross section.
24. The implant as claimed in Claim 16, wherein said means for tightening does not include a set screw.
25. The implant as claimed in Claim 16, further comprising a first end connector attached to said beam and a second end connector attached to said second rod member.
26. The implant as claimed in Claim 16, wherein said second rod member further includes an end connector at an end of said lower arm, said end connector including a socket for receiving a head of a pedicle screw.
27. The implant as claimed in Claim 26, wherein said socket includes a hole for a tension link shaft, and said upper arm includes a hole substantially aligned with said hole in said socket.
28. The implant as claimed in Claim16, wherein a deformable connector is situated within a cavity of the second rod member, said deformable connector securing a shank of a pedicle screw to said second rod member upon tightening of said means for tightening.
29. The implant as claimed in Claim 28, wherein said deformable connector is compressed by an upper shoulder of said upper arm, a lower shoulder of said lower arm, and a shank of said means for tightening.
30. The implant as claimed in Claim 28, wherein said deformable connector comprises a groove.
31. The implant as claimed in Claim 28, wherein said deformable connector is substantially disc-shaped.
32. The implant as claimed in Claim 28, wherein at least a portion of said deformable connector comprises a skeletonized structure.
33. The implant as claimed in Claim 28, wherein at least a portion of said deformable connector has a truncated exterior surface.
34. The implant as claimed in Claim 28, wherein said deformable connector comprises an indentation along a portion of an exterior surface.
35. In subcombination, a rod member for use with a bone stabilizing rod, the rod member comprising:
(a) an upper arm;
(b) a lower arm interconnected to said upper arm, wherein at least a portion of said lower arm is separated from said upper arm by a slot and a hollow chamber, said hollow chamber sized to receive at least a portion of the bone stabilizing rod;
wherein said upper arm is moveable to compress and secure the portion of the bone stabilizing rod between an interior surface of said upper arm and an interior surface of said lower arm.
36. The subcombination of claim 359 wherein the rod member further comprises a distal opening for receiving at least a portion of the bone stabilizing rod, wherein said distal opening is formed within a hoop structure connected to the upper arm and separated from said lower arm by a notch.
37. The subcombination of claim 36, wherein said lower arm further comprises an end connector adapted for interconnection to a bone screw.
38. In subcombination, a deformable connector for use with a stabilizing rod clamp, the deformable connector securing a portion of a substantially cylindrical member within a cavity in the stabilizing rod clamp, the deformable connector comprising:
(a) a disc having a passageway adapted to receive the substantially cylindrical member;
(b) a groove along an exterior surface of said disc and extending to said passageway;
wherein said disc is compressible to secure the substantially cylindrical member within said passageway upon application of a compressing force to said disc.
39. The subcombination of claim 38, wherein at least a portion of said disc comprises a skeletonized structure.
40. The subcombination of claim 38, wherein at least a portion of said disc has a truncated exterior surface.
41. The subcombination of claim 38, wherein said disc comprises an indentation along a portion of said exterior surface.
42. A connector device for a bone screw, comprising:
a clamp including an upper section and a lower section separated by a slot, said upper section including a first aperture and said lower section including a second aperture substantially aligned with said first aperture, said first and second apertures sized to accommodate a shank of the bone screw; and a tightening member operatively connected to said upper section and said lower section, wherein upon advancing said tightening member, said tightening member reduces the size of said slot between said upper section and said lower section, thereby securing the shank of the bone screw within the device.
43. The device as claimed in Claim 42, wherein said tightening member is a screw or a bolt.
44. The device as claimed in Claim 42, wherein said clamp is substantially C-shaped.
45. The device as claimed in Claim 42, further comprising a beam interconnected to said clamp.
46. A bone stabilization assembly for securing a first bone segment to a second bone segment, comprising:
first bone screw attachable to the first bone segment and a second bone screw attachable to the second bone segment;
a first rod member including a beam and an end connector, said end connector attachable to said first bone screw;
a second rod member including an interior hollow chamber for longitudinally receiving at least a portion of said beam, said second rod member including an upper arm and an opposing lower arm, said upper ann and said lower arm spaced apart by a slot wherein said slot is contiguous with said interior hollow chamber, and wherein said upper arm is moveable to contact said beam and compress said beam between said upper arm and said lower arm, said second rod member including a connector attachable to said second bone screw;
means for tightening said second rod member to secure said beam within said second rod member.
47. The bone stabilization assembly of claim 46, wherein said means for tightening forces said connector of said second rod member to secure said second rod member to said second bone screw.
48. The bone stabilization assembly of claim 46, wherein said connector of said second rod member comprises a socket.
49. The bone stabilization assembly of claim 46, wherein said connector of said second rod member comprises a deformable connector.
50. The bone stabilization assembly of claim 49, wherein said deformable connector is disc-shaped.
51. A method of interconnecting a first vertebra to a second vertebra, the method comprising the steps of:
(a) attaching a first pedicle screw to the first vertebra and a second pedicle screw to the second vertebra;
(b) inserting a beam of a first rod member into a second rod member, the second rod member including an interior hollow chamber for longitudinally receiving at least a portion of the beam, the second rod member including an upper arm and an opposing lower arm, the upper arm and the lower arm spaced apart by a slot wherein the slot is contiguous with the interior hollow chamber, wherein the upper arm is moveable to contact the beam and compress the beam between the upper arm and the lower arm, and wherein the second rod member includes an integral connector for attaching the second rod member to the second pedicle screw;
(c) connecting the first rod member to the first pedicle screw using a connector interconnected to the beam; and (d) advancing a single tightening mechanism to secure:
(i) the second rod member to the beam of the first rod member, and (ii) the second rod member to the second pedicle screw.
52. The method as claimed in claim 51, wherein the tightening mechanism is a tightening screw in the second rod member.
53. The method as claimed in claim 51, wherein the tightening mechanism is a tension link nut threaded onto a tension link shaft.
CA2516791A 2003-02-25 2004-02-25 Adjustable rod and connector device and method of use Expired - Fee Related CA2516791C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US45017903P 2003-02-25 2003-02-25
US60/450,179 2003-02-25
US46019503P 2003-04-04 2003-04-04
US60/460,195 2003-04-04
PCT/US2004/005751 WO2004075778A2 (en) 2003-02-25 2004-02-25 Adjustable rod and connector device and method of use

Publications (2)

Publication Number Publication Date
CA2516791A1 true CA2516791A1 (en) 2004-09-10
CA2516791C CA2516791C (en) 2011-12-13

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ID=32930544

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2516791A Expired - Fee Related CA2516791C (en) 2003-02-25 2004-02-25 Adjustable rod and connector device and method of use

Country Status (6)

Country Link
US (3) US6991632B2 (en)
EP (1) EP1596738A4 (en)
JP (1) JP4598760B2 (en)
AU (1) AU2004216131B2 (en)
CA (1) CA2516791C (en)
WO (1) WO2004075778A2 (en)

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EP1596738A4 (en) 2010-01-20
WO2004075778A3 (en) 2005-06-02
AU2004216131A1 (en) 2004-09-10
AU2004216131B2 (en) 2009-12-10
US20040181223A1 (en) 2004-09-16
CA2516791C (en) 2011-12-13
US6991632B2 (en) 2006-01-31
JP4598760B2 (en) 2010-12-15
US20100137914A1 (en) 2010-06-03
WO2004075778A2 (en) 2004-09-10
JP2006518657A (en) 2006-08-17
US20050149023A1 (en) 2005-07-07
EP1596738A2 (en) 2005-11-23
US7655025B2 (en) 2010-02-02

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