CA2668485A1 - Spinal cross connectors - Google Patents

Spinal cross connectors Download PDF

Info

Publication number
CA2668485A1
CA2668485A1 CA002668485A CA2668485A CA2668485A1 CA 2668485 A1 CA2668485 A1 CA 2668485A1 CA 002668485 A CA002668485 A CA 002668485A CA 2668485 A CA2668485 A CA 2668485A CA 2668485 A1 CA2668485 A1 CA 2668485A1
Authority
CA
Canada
Prior art keywords
spinal
connector
female member
cross connector
spinal cross
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
CA002668485A
Other languages
French (fr)
Other versions
CA2668485C (en
Inventor
Philip A. CORMIER
Ernest Quintanilha
Joseph T. Stalaboin Iv
Holly R. Brideau
Michael Carl Michielli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DePuy Spine LLC
Original Assignee
Depuy Spine, Inc.
Philip A. CORMIER
Ernest Quintanilha
Joseph T. Stalaboin Iv
Holly R. Brideau
Michael Carl Michielli
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 Depuy Spine, Inc., Philip A. CORMIER, Ernest Quintanilha, Joseph T. Stalaboin Iv, Holly R. Brideau, Michael Carl Michielli filed Critical Depuy Spine, Inc.
Publication of CA2668485A1 publication Critical patent/CA2668485A1/en
Application granted granted Critical
Publication of CA2668485C publication Critical patent/CA2668485C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
    • 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
    • A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
    • A61B17/7052—Connectors, not bearing on the vertebrae, for linking longitudinal elements together of variable angle or length

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

Various methods and devices are provided for connecting spinal fixation elements, such as spinal rods, implanted in a patient's spinal column. In particular, various spinal cross connectors are provided for connecting to one or more spinal fixation elements implanted in a patient's spine. The cross connectors can have a variety of configurations, including a fixed or adjustable length, as well as various features that allow certain portions of the cross connectors to be angularly oriented.

Claims (30)

1. A spinal cross connector, comprising:
a first connector element for engaging a spinal fixation element, the first connector element having a female member;
a second connector element for engaging a spinal fixation element, the second connector element having a male member that is receivable within the female member such that the male member is (i) adjustably slidable within the female member along a longitudinal axis of the male member, (ii) rotatable about the longitudinal axis within the female member, and (iii) pivotable within the female member such that the longitudinal axis can be angularly oriented relative to a longitudinal axis of the first connector element; and a fastening element adapted to be disposed within the female member to engage and lock the male member in a fixed position relative to the female member.
2. The spinal cross connector of claim 1, wherein the female member comprises a housing having a first opening formed therethrough for receiving the male member, and a second opening formed therethrough that is in communication with the first opening and that is configured to receive the fastening element.
3. The spinal cross connector of claim 2, wherein the first opening in the female member includes opposed portions that increase in width from a substantial mid-portion of the first opening such that the opposed portions allow the male member to pivot within the female member.
4. The spinal cross connector of claim 2, wherein male member comprises a generally elongate cylindrical shaft.
5. The spinal cross connector of claim 1, wherein the male member is disposed through the female member and the male member includes a retaining element on a terminal end thereof that is adapted to prevent removal of the male member from the female member.
6. The spinal cross connector of claim 1, wherein the fastening element is disposed within the female member and the female member includes a retaining element formed thereon that is adapted to prevent removal of the fastening element from the female member.
7. The spinal cross connector of claim 1, wherein, when the male member and the fastening element are disposed within the female member, the male and female members have first and second points of contact therebetween and the male member and the fastening element have one point of contact therebetween.
8. The spinal cross connector of claim 7, wherein the first and second points of contact between the male and female members are spaced a distance apart from one another.
9. The spinal cross connector of claim 1, further comprising first and second engagement elements slidably disposed within the first and second connector elements, and first and second locking mechanisms receivable within the first and second connector elements and adapted to slidably move the first and second engagement elements to cause the first and second engagement elements to engage and lock a spinal fixation element within first and second recesses formed in the first and second connector elements.
10. The spinal cross connector of claim 1, further comprising a bend zone formed in at least one of the first and second connector elements.
11. A spinal cross connector, comprising:
a first connector element for engaging a spinal fixation element, the first connector element further having a female member;
a second connector element for engaging a spinal fixation element, the second connector element further having a male member that is receivable within the female member;
a fastening element adapted to be disposed within the female member to lock the male member in a fixed position relative to the female member;
a first insert adapted to be disposed within the female member and to be positioned between the male member and the female member; and a second insert adapted to be disposed within the female member and to be positioned between the fastener and the male member.
12. The spinal cross connector of claim 11, wherein the male member is (i) adjustably slidable within the female member along a longitudinal axis of the male member, (ii) rotatable about the longitudinal axis within the female member, and (iii) pivotable within the female member such that the longitudinal axis can be angularly oriented relative to a longitudinal axis of the first connector element.
13. The spinal cross connector of claim 11, wherein the first and second inserts are adapted to allow the male member to pivot within the female member such that a longitudinal axis of the second connector element can be angularly oriented relative to a longitudinal axis of the first connector element.
14. The spinal cross connector of claim 11, wherein the first and second inserts have a substantially hemispherical shape.
15. The spinal cross connector of claim 14, wherein the male member includes opposed planar surfaces that rest between planar surfaces on the first and second inserts when the male member and first and second inserts are disposed within the female member.
16. The spinal cross connector of claim 11, wherein the female member comprises a housing having a first opening formed therethrough for receiving the male member, and a second opening in communication with the first opening formed therethrough for receiving the fastening element.
17. The spinal cross connector of claim 16, wherein the first and second inserts have a substantially hemi-spherical shape, and wherein the first opening includes a concavity formed therein and adapted to polyaxially seat the first insert and the fastening element includes a concavity formed therein and adapted to polyaxially seat the second insert.
18. The spinal cross connector of claim 11, wherein the first connector element has a generally elongate shaft with a first terminal end having a recess formed therein for receiving a spinal fixation element and a second terminal end having the female member formed thereon, and the second connector element has a generally elongate shaft with a first terminal end having a recess formed therein for receiving a spinal fixation element and a second terminal end that forms the male member.
19. The spinal cross connector of claim 11, wherein the fastening element comprises a threaded member adapted to mate with corresponding threads formed within the female member.
20. A spinal cross connector, comprising:
an elongate member having a first end with a first recess formed therein that is configured to receive a spinal fixation element, and an opposed second end with a second recess formed therein that is configured to receive a spinal fixation element;
first and second engagement elements disposed within the elongate member; and first and second locking mechanisms disposable within first and second openings formed in the first and second ends, the first and second openings being positioned such that the first and second recesses are located between the first and second openings, and the first and second locking mechanisms being adapted to move the first and second engagement elements to cause the first and second engagement elements to engage and lock first and second spinal fixation elements within the first and second recesses.
21. The spinal cross connector of claim 20, wherein the elongate member includes opposed top and bottom surfaces, and wherein the first and second recesses are formed in the bottom surface and the first and second openings are formed in the top surface.
22. The spinal cross connector of claim 20, wherein the first and second engagement elements are slidably disposed within the elongate member, and the first and second locking mechanisms are adapted to slidably move the first and second engagement elements.
23. The spinal cross connector of claim 20, wherein the first and second openings have longitudinal axes that extend substantially perpendicular to a longitudinal axis of the elongate member.
24. The spinal cross connector of claim 20, wherein the first and second locking mechanisms and the first and second engagement mechanisms are configured such that a force applied to first and second spinal fixation elements by the first and second engagement mechanisms is greater than an axial force applied to the first and second engagement mechanisms by the first and second locking mechanisms.
25. A spinal cross connector, comprising:
an elongate body having opposed first and second ends and opposed top and bottom surfaces;
first and second recesses formed in the bottom surface adjacent to the first and second ends of the elongate body, the first and second recesses being oriented to enable the elongate body to be simultaneously top-loaded onto first and second spinal fixation elements; and first and second bores formed in the top surface of the elongate body and effective to receive first and second locking mechanisms for locking first and second spinal fixation elements within the first and second recesses, the first and second bores having longitudinal axes that are substantially parallel to one another and that are substantially parallel to an axis of loading the elongate body onto first and second spinal fixation elements.
26. The spinal cross connector of claim 25, wherein the first and second recesses comprise substantially concave cavities formed in the bottom surface of the elongate body.
27. The spinal cross connector of claim 26, wherein the concave cavities have opposed sidewalls that are substantially parallel to one another and substantially parallel to the longitudinal axes of the first and second bores in the elongate member.
28. The spinal cross connector of claim 25, further comprising first and second locking mechanisms disposed within the first and second bores and adapted to lock first and second spinal fixation elements within the first and second recesses.
29. The spinal cross connector of claim 28, further comprising first and second engagement elements movably disposed within the elongate body, the first and second locking mechanisms being effective to move the first and second engagement elements to cause the first and second engagement elements to engage and lock first and second spinal fixation elements within the first and second recesses.
30. The spinal cross connector of claim 29, wherein the first and second locking mechanisms and the first and second engagement mechanisms are configured such that a force applied to first and second spinal fixation elements by the first and second engagement mechanisms is greater than an axial force applied to the first and second engagement mechanisms by the first and second locking mechanisms.
CA2668485A 2006-11-08 2007-10-24 Spinal cross connectors Expired - Fee Related CA2668485C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/557,699 US8361117B2 (en) 2006-11-08 2006-11-08 Spinal cross connectors
US11/557,699 2006-11-08
PCT/US2007/022505 WO2008057217A2 (en) 2006-11-08 2007-10-24 Spinal cross connectors

Publications (2)

Publication Number Publication Date
CA2668485A1 true CA2668485A1 (en) 2008-05-15
CA2668485C CA2668485C (en) 2012-03-13

Family

ID=39360648

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2668485A Expired - Fee Related CA2668485C (en) 2006-11-08 2007-10-24 Spinal cross connectors

Country Status (5)

Country Link
US (2) US8361117B2 (en)
EP (1) EP2094175B1 (en)
AU (1) AU2007318173B2 (en)
CA (1) CA2668485C (en)
WO (1) WO2008057217A2 (en)

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CA2668485C (en) 2012-03-13
US8361117B2 (en) 2013-01-29
US8870921B2 (en) 2014-10-28
EP2094175A4 (en) 2011-08-03
AU2007318173A1 (en) 2008-05-15
US20080109039A1 (en) 2008-05-08
EP2094175B1 (en) 2017-05-10
AU2007318173B2 (en) 2011-04-28
EP2094175A2 (en) 2009-09-02
US20130116731A1 (en) 2013-05-09
WO2008057217A3 (en) 2008-10-09
WO2008057217A2 (en) 2008-05-15

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