CA2463559A1 - Adjustable fixator - Google Patents

Adjustable fixator Download PDF

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Publication number
CA2463559A1
CA2463559A1 CA002463559A CA2463559A CA2463559A1 CA 2463559 A1 CA2463559 A1 CA 2463559A1 CA 002463559 A CA002463559 A CA 002463559A CA 2463559 A CA2463559 A CA 2463559A CA 2463559 A1 CA2463559 A1 CA 2463559A1
Authority
CA
Canada
Prior art keywords
bone fixator
disposed
borehole
main body
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
CA002463559A
Other languages
French (fr)
Other versions
CA2463559C (en
Inventor
Michael N. Langmaid
Thomas Joseph Maughan
Christoph Andreas Roth
Michael C. Mazzio
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 Synthes Products Inc
Original Assignee
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
Priority to CA2771048A priority Critical patent/CA2771048C/en
Publication of CA2463559A1 publication Critical patent/CA2463559A1/en
Application granted granted Critical
Publication of CA2463559C publication Critical patent/CA2463559C/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
    • A61B17/60—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
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6458—Devices extending alongside the bones to be positioned with pin-clamps fixed at ends of connecting element
    • 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
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6416—Devices extending alongside the bones to be positioned with non-continuous, e.g. hinged, pin-clamp connecting element
    • 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
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6425—Devices extending alongside the bones to be positioned specially adapted to be fitted across a bone joint
    • 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
    • A61B17/66—Alignment, compression or distraction mechanisms

Abstract

A bone fixator for securing a first bone portion in a position relative to second bone portion is disclosed, including at least two clamping assemblies each for receiving at least one bone pin and a main body disposed between the clamping assemblies. The main body includes at least one joint for orienting the clamping assemblies with respect to each other. The at least one joint may permit pivoting or rotation. Some joints permit the articulation of several components to be simultaneously and releasably lockable.

Claims (38)

1. A bone fixator comprising:
at least two clamping assemblies each for receiving at least one bone fastener;
a main body disposed between the clamping assemblies, the main body having first and second ends, a first coupling member, and a second coupling member;
the first coupling member being pivotably coupled to the first end of the main body about a first axis;
the second coupling member being pivotably coupled to the second end of the main body about a second axis;
a wedge disposed within the main body having a borehole disposed along a translation axis;
a locking member disposed along the translation axis and operatively associated with the wedge;
a first moveable element disposed between the first coupling member and the wedge; and a second moveable element disposed between the second coupling member and the wedge, wherein the wedge is engageable with the moveable elements to arrest pivoting of the coupling members and disengageable from the moveable elements to permit pivoting thereof with respect to the main body.
2. The bone fixator of claim 1, wherein the borehole and locking member are threadably associated with each other.
3. The bone fixator of claim 2, wherein the locking member is fixed in position along the translation axis and rotatable thereabout.
4. The bone fixator of claim 3, wherein the moveable elements are slidably associated with the wedge.
5. The bone fixator of claim 4, wherein at least one of the coupling members and at least one of the locking members each have textured portions, the textured portion of the at least one coupling member being positively lockable with the textured portion of the at least one locking member.
6. The bone fixator of claim 5, wherein the textured portions include textures selected from serrations and facets.
7. The bone fixator of claim 4, wherein at least a portion of the main body has an inner cylindrical surface and the moveable elements are configured and dimensioned to be slidably associated with the cylindrical surface.
8. The bone fixator of claim 4, wherein the moveable elements are resiliently biased toward each other.
9. The bone fixator of claim 1, wherein the wedge comprises first and second outer engagement surfaces disposed transverse to each other.
10. The bone fixator of claim 9, wherein the first and second outer engagement surfaces are disposed at an angle of between about 10° and about 70°.
11. The bone fixator of claim 10, wherein the first and second outer engagement surfaces are disposed at an angle of about 22°.
12. The bone fixator of claim 11, wherein the moveable elements each comprise an inner engagement surface, and the engagement surfaces of the moveable elements are disposed at about the same angle as the first and second outer engagement surfaces of the wedge.
13. The bone fixator of claim 1, wherein the first and second axes are disposed transverse to each other.
14. The bone fixator of claim 13, wherein the first and second axes are disposed substantially perpendicular to each other.
15. The bone fixator of claim 1, wherein at least one of the clamping assemblies is operatively associated with the first coupling member.
16. The bone fixator of claim 15, wherein the at least one clamping assembly is translatable with respect to the first coupling member.
17. The bone fixator of claim 1, further comprising a distractor body operatively associated with the first coupling member, wherein at least one of the clamping assemblies is operatively associated with the distractor body.
18. The bone fixator of claim 17, wherein at least one clamping assembly is translatable with respect to the distractor body and releasably lockable thereto.
19. The bone fixator of claim 1, wherein at least one of the clamping assemblies comprises at least one of the first or second coupling members.
20. The bone fixator of claim 1, further comprising a joint assembly comprising:
a joint assembly body with a borehole extending therethrough along a borehole axis and a fastener hole extending along a fastener axis transverse to the borehole axis, the body having an outer surface and an inner borehole surface;
a slit extending along the borehole axis and across the fastener hole from the outer surface to the inner borehole surface, the slit defining opposed slit surfaces having a separation width; and a fastener configured and dimensioned to be received in the fastener hole, wherein the size of the borehole is adjustable by changing the separation width of the opposed slit surfaces.
21. The bone fixator of claim 20, wherein the joint assembly body further comprises at least one rib disposed radially on the inner borehole surface.
22. The bone fixator of claim 21, wherein the second coupling member is retained in the joint assembly by the rib.
23. The bone fixator of claim 22, wherein the joint assembly body further comprises a second rib and a third coupling member is retained in the joint assembly by the second rib.
24. The bone fixator of claim 23, wherein the second and third coupling members have opposed surfaces disposed in the borehole that are coupled together by an insert member.
25. The bone fixator of claim 24, wherein the insert member extends within recessed portions of the second and third coupling members.
26. The bone fixator of claim 25, further comprising a link member disposed between the third coupling member and a second of the clamping assemblies.
27. The bone fixator of claim 26, wherein the link member is pivotably associated with the second clamping assembly.
28. The bone fixator of claim 20, wherein the slit includes first and second sections, the sections being oriented at an angle of between about 20° and 50° with respect to each other.
29. The bone fixator of claim 20, wherein the joint assembly is formed of a fiber-reinforced polymer.
30. The bone fixator of claim 1, further comprising a second main body comprising a second wedge, a second locking member, a third moveable element, and a fourth moveable element.
31. A bone fixator comprising:
at least two clamping assemblies each for receiving at least one bone fastener;
a main body disposed between the clamping assemblies, the main body having a joint assembly comprising:
a male segment having first and second ends and a projection extending from the second end;

a female segment having first and second ends, a cavity disposed proximate the first end and configured and dimensioned to receive at least a portion of the projection, and an opening connected to the cavity; and a cover piece configured and dimensioned to be received in the opening, wherein when the male segment is inserted in the female segment and the cover piece is disposed in the opening, the cover piece resists removal of the projection and the male segment is releasably rotatable with respect to the female segment.
32. The bone fixator of claim 31, wherein the projection comprises a serrated cylindrical portion and the cover piece comprises a serrated arcuate inner surface, wherein the serrated cylindrical portion and the serrated arcuate inner surface are mutually positively lockable.
33. The bone fixator of claim 32, wherein the female segment further comprises a fastener hole and the cover piece further comprises a cover piece hole, the holes being coaxial when the cover piece is disposed in the opening.
34. The bone fixator of claim 33, further comprising a fastener, wherein when the fastener is disposed in the coaxial fastener hole and cover piece hole, the cover piece is securable to the female segment.
35. The bone fixator of claim 31, further comprising at least one tension clamp comprising:
a body having a borehole extending therethrough along a borehole axis and a fastener hole extending along a fastener axis transverse to the borehole axis, the body having an outer surface and an inner borehole surface;
a slit extending along the borehole and across the fastener hole from the outer surface to the inner borehole surface, the slit defining opposed slit surfaces having a separation width; and a fastener configured and dimensioned to be received in the fastener hole, wherein the size of the borehole is adjustable by changing the separation width of the opposed slit surfaces.
36. A bone fixator comprising at least two clamping assemblies each for receiving at least one bone fastener, and a main body disposed between the clamping assemblies, the main body having at least one joint selected from the group consisting of (1) a first joint comprising a main body having first and second ends, a first coupling member pivotably coupled to the first end and a second coupling member pivotably coupled to the second end, a wedge disposed within the main body having a borehole disposed along a translation axis, a locking member disposed along the translation axis and operatively associated with the wedge, a first moveable element disposed between the first coupling member and the wedge, a second moveable element disposed between the second coupling member and the wedge, with the wedge being engageable with the moveable elements to arrest pivoting of the coupling members and disengageable from the moveable elements to permit pivoting thereof with respect to the main body;
(2) a second joint comprising a joint assembly body having an outer surface and a borehole extending therethrough along a borehole axis forming an inner borehole surface, and a fastener hole extending along a fastener axis transverse to the borehole axis, a slit extending substantially along the direction of the borehole and across the fastener hole from the outer surface to the inner borehole surface and defining opposed slit surfaces having a separation width, with the size of the borehole being adjustable by changing the separation width of the opposed slit surfaces; and (3) a third joint comprising a male segment having a projection extending from an end thereof, a female segment having a cavity disposed proximate an end thereof and an opening connected to the cavity, the cavity being configured and dimensioned to receive at least a portion of the projection, and a cover piece configured and dimensioned to be received in the opening, wherein when the male segment is inserted in the female segment and the cover piece is disposed in the opening, the cover piece resists removal of the projection and the male segment is releasably rotatable with respect to the female segment.
37. The bone fixator of claim 36, wherein the main body comprises at least two different joints selected from the first joint, the second joint, and the third joint.
38. The bone fixator of claim 36, wherein the main body comprises at least one first joint and at least one second joint.
CA2463559A 2001-10-09 2002-10-08 Adjustable fixator Expired - Fee Related CA2463559C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2771048A CA2771048C (en) 2001-10-09 2002-10-08 Adjustable fixator

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US32729401P 2001-10-09 2001-10-09
US60/327,294 2001-10-09
US10/265,258 US7261713B2 (en) 2001-10-09 2002-10-07 Adjustable fixator
US10/265,258 2002-10-07
PCT/US2002/032047 WO2003030759A2 (en) 2001-10-09 2002-10-08 Adjustable fixator

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2771048A Division CA2771048C (en) 2001-10-09 2002-10-08 Adjustable fixator

Publications (2)

Publication Number Publication Date
CA2463559A1 true CA2463559A1 (en) 2003-04-17
CA2463559C CA2463559C (en) 2012-04-10

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
CA2861456A Expired - Lifetime CA2861456C (en) 2001-10-09 2002-10-08 Adjustable fixator
CA2771048A Expired - Fee Related CA2771048C (en) 2001-10-09 2002-10-08 Adjustable fixator
CA2463559A Expired - Fee Related CA2463559C (en) 2001-10-09 2002-10-08 Adjustable fixator

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2861456A Expired - Lifetime CA2861456C (en) 2001-10-09 2002-10-08 Adjustable fixator
CA2771048A Expired - Fee Related CA2771048C (en) 2001-10-09 2002-10-08 Adjustable fixator

Country Status (13)

Country Link
US (2) US7261713B2 (en)
EP (1) EP1434531B1 (en)
JP (1) JP4291690B2 (en)
CN (1) CN100500109C (en)
AR (1) AR036783A1 (en)
AT (1) ATE355026T1 (en)
AU (1) AU2002342011B2 (en)
BR (1) BR0213219A (en)
CA (3) CA2861456C (en)
DE (1) DE60218501T2 (en)
ES (1) ES2283606T3 (en)
TW (1) TWI262069B (en)
WO (1) WO2003030759A2 (en)

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US20030069580A1 (en) 2003-04-10
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CA2861456A1 (en) 2003-04-17
JP4291690B2 (en) 2009-07-08

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