Surgical distance adjusting assembly for a bone distractor

Patent metadata

Field	Value
Publication number	US-9782202-B2
Application number	US-201314103252-A
Country	US
Kind code	B2
Filing date	Dec 11, 2013
Priority date	Dec 12, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A surgical distance adjusting assembly for a distractor has a base having a first connecting portion configured to hold a first bone attachment member and a carrier having a second connecting portion configured to hold a second bone attachment member. The base and the carrier are movable relative to each other, wherein the first and second connecting portions provide a releasable mechanical coupling to the first and second bone attachment members. The releasable mechanical coupling comprises a hook member at one or both of the first and second connecting portions and configured to engage the respective bone attachment member. Alternatively, the releasable mechanical coupling comprises an opening at one or both of the first and second connecting portions. The opening has a thread for a fixation screw configured to releasable couple the respective bone attachment member to the respective connecting portion.

First claim

The invention claimed is:

1. A surgical distance adjusting assembly for a bone distractor, the assembly comprising:
a base having a first connecting portion configured to hold a first bone attachment member;
a carrier having a second connecting portion configured to hold a second bone attachment member, the base and the carrier being movable along a longitudinal axis relative to each other and the first and second connecting portions providing a releasable mechanical coupling to the first and second bone attachment members; and
wherein the releasable mechanical coupling comprises a hook member at one or both of the first and second connecting portions to engage a cavity, the cavity is configured to at least partially receive the hook member of the respective connecting portion by movement in a direction perpendicular to the longitudinal axis of the base and carrier, and maintain the respective hook members within the cavity during the relative axial movement of the first and second connecting portions.

2. The surgical distance adjusting assembly according to claim 1 , wherein one or both of the first and second connecting portions comprises an engagement surface configured to slidably abut against the respective bone attachment member.

3. The surgical distance adjusting assembly according to claim 1 , wherein the engagement surface delimits an engagement cavity of the respective connecting portion.

4. The surgical distance adjusting assembly according to claim 3 , wherein the hook member is arranged within the engagement cavity.

5. The surgical distance adjusting assembly according to claim 3 , wherein the engagement cavity or the recess opens out in a direction of a longitudinal axis of the surgical distance adjusting assembly.

6. The surgical distance adjusting assembly according to claim 3 , wherein the engagement cavity or the recess opens out in opposite directions along a direction of a longitudinal axis of the surgical distance adjusting assembly.

7. The surgical distance adjusting assembly according to claim 1 , wherein the surgical distance adjusting assembly is configured to release, upon a movement of the carrier and the base towards each other in a direction of a longitudinal axis of the surgical distance adjusting assembly, the first and second bone attachment members from the first and second connecting portions.

8. The surgical distance adjusting assembly according to claim 1 , wherein the carrier is rotationally locked relative to the base.

9. A surgical distance adjusting assembly for a bone distractor, the assembly comprising:
a base having a first connecting portion configured to hold a first bone attachment member; and
a carrier having a second connecting portion configured to hold a second bone attachment member, the base and the carrier being movable relative to each other along a longitudinal axis and the first and second connecting portions providing a releasable mechanical coupling to the first and second bone attachment members,
wherein the releasable mechanical coupling comprises a hook member at one or both of the first and second connecting portions to engage the respective bone attachment member, and
wherein one or both of the first and second connecting portions comprises an engagement cavity, wherein the hook member is placed within the respective engagement cavity by movement in a direction perpendicular to the longitudinal axis and maintained therein during axial movement of the respective connecting portion.

10. The surgical distance adjusting assembly according to claim 9 , wherein one or both of the first and second connecting portions comprises an engagement surface configured to slidably abut against the respective bone attachment member.

11. The surgical distance adjusting assembly according to claim 9 , wherein the engagement surface delimits the engagement cavity of the respective connecting portion.

12. The surgical distance adjusting assembly according to claim 9 wherein the hook member extends in a substantially parallel direction of a longitudinal axis of the surgical distance adjusting assembly.

13. The surgical distance adjusting assembly according to claim 9 wherein the engagement cavity has a longitudinal axis extending parallel to the longitudinal axis of the surgical distance adjusting assembly.

14. The surgical distance adjusting assembly according to claim 9 wherein the engagement cavity of the first connecting portion opens out towards a first end of the surgical distance adjusting assembly, and the engagement cavity of the second connecting portion opens out towards a second end of the surgical distance adjusting assembly.

15. The surgical distance adjusting assembly according to claim 9 wherein the engagement cavity is adapted to a shape of an assembly connecting portion of the respective bone attachment member to provide a substantially matching fit therebetween.

16. The surgical distance adjusting assembly according to claim 9 wherein each of the first and second connecting portions comprises more than one hook members configured to releasable engage an engagement portion of the respective bone attachment member.

17. The surgical distance adjusting assembly according to claim 9 wherein the surgical distance adjusting assembly is configured to release the first and second bone attachment members from the first and second connecting portions upon a movement of the carrier and the base towards each other in a direction of the longitudinal axis.

18. The surgical distance adjusting assembly according to claim 9 wherein the carrier is rotationally locked against rotation relative to the base.

19. A surgical distance adjusting assembly for a bone distractor, the assembly comprising:
a base having a first connecting portion configured to releasably hold a first bone attachment member to the base;
a carrier mounted on the base and moveable with respect thereto, the carrier having a second connecting portion configured to releasably hold a second bone attachment member to the carrier, the base and the carrier being movable relative to each other along a longitudinal axis and the first and second connecting portions providing a releasable mechanical coupling to the first and second bone attachment members, and wherein the mechanical coupling maintains the first and second attachment members in a fixed position with respect to the base and the carrier during the relative axial movement of the base and carrier, the first and second attachment members mountable on a bone surface; and
the connecting portions of the base and carrier and the first and second attachment members have a mating hook and opening for selectively forming the mechanical coupling between the base and first attachment member and the carrier and the second attachment member, the opening surrounded by portions of the first and second bone attachment members such that the hook is located under a portion of the bone attachment member in a first axial position and located only in the opening in a second axial position, so that release of the first and second attachment members from the base and carrier first requires movement in an axial direction and then in a direction away from the bone surface and perpendicular to the longitudinal axis of the base and carrier.

20. A surgical distance adjusting assembly for a bone distractor, the assembly comprising:
a base having a first connecting portion configured to hold a first bone attachment member;
a carrier having a second connecting portion configured to ho

Assignees

• Stryker European Holdings I Llc

Inventors

• Knoepfle Christian
• Greiner Karl
• Schmuck Manfred
• Volk Michael

Classifications

• A61B17/8071

  for the jaw · CPC title

• A61B2017/00991

  Telescopic means · CPC title

• A61B17/663 Primary

  for jaw bones, e.g. subcutaneous distractors with external access (periodontal bone regeneration A61C8/0006) · CPC title

• A61B17/666

  for alveolar distraction · CPC title

• A61B17/66 Primary

  {Alignment}, compression or distraction mechanisms · CPC title