Guides for fracture system

Patent metadata

Field	Value
Publication number	US-10575968-B2
Application number	US-201715601100-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 16, 2014
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

A prosthetic shoulder implant system includes a prosthetic humeral implant and a version device. The humeral implant includes a catch member aperture and a first locking pin aperture. The version device includes a rotatable member with a body and a flexure member, and a plate with a catch member and a projection contacting the flexure member. A first locking pin extends from the version device and is adapted to mate with the first locking pin aperture. In an unlocked condition of the system, the rotatable member has a first rotated position in which the flexure member is in an uncompressed state and the plate is in a first position, and in a locked condition of the system, the rotatable member has a second rotated position in which the flexure member is in a compressed state and the plate is in a second position proximal of the first position.

First claim

The invention claimed is:

1. A prosthetic shoulder implant system comprising:
a prosthetic humeral implant including a catch member aperture and a first locking pin aperture; and
a version device for measuring a rotational position of the prosthetic humeral implant including:
a body portion;
a rotatable member having a handle and a flexure member, the rotatable member rotatably coupled to the body portion of the version device;
a plate having a catch member adapted to mate with the catch member aperture, and a projection in contact with the flexure member, the catch member extending from a distal portion of the body portion of the version device along a first axis, the plate being translatable relative to the body portion of the version device; and
a first locking pin extending from the distal portion of body portion of the version device along a second axis non-parallel to the first axis and adapted to mate with the first locking pin aperture;

wherein in an unlocked condition of the system, the rotatable member has a first rotated position in which the flexure member is in an uncompressed state and the plate is in a first position, and in a locked condition of the system, the rotatable member has a second rotated position in which the flexure member is moveable relative to the handle and is in a compressed state and the plate is in a second position proximal of the first position.

2. The system of claim 1 , wherein the prosthetic humeral implant is a permanent implant stem.

3. The system of claim 2 , wherein the permanent implant stem includes a plurality of indicia for marking the height of the permanent implant stem.

4. The system of claim 1 , wherein the prosthetic humeral implant is a trial stem implant.

5. The system of claim 4 , wherein the trial stem implant includes a plurality of indicia for marking the height of the trial stem implant.

6. The system of claim 1 , further comprising a biasing member biasing the plate to the first position.

7. The system of claim 1 , wherein the handle of the rotatable member includes a first projection in contact with a stopper pin when the rotatable member is in the first rotated position, the first projection resisting rotation of the rotatable member in a first rotational direction.

8. The system of claim 7 , wherein the handle of the rotatable member includes a second projection in contact with the stopper pin when the rotatable member is in the second rotated position, the second projection resisting rotation of the rotatable member in a second rotational direction opposite the first rotational direction.

9. The system of claim 1 , wherein the flexure member includes a first groove, a second groove, and a projecting portion between the first and second grooves.

10. The system of claim 9 , wherein in the unlocked condition of the system, the projection of the plate is positioned within the first groove.

11. The system of claim 10 , wherein in the locked condition of the system, the projection of the plate is positioned within the second groove.

12. The system of claim 11 , wherein the system includes an intermediate condition in which the rotatable member is in a third rotated position between the first and second rotated positions and the projection of the plate contacts the projecting portion of the flexure member.

13. The system of claim 12 , wherein the flexure member is at a maximum amount of compression in the intermediate condition of the system.

14. The system of claim 1 , wherein when the catch member is positioned within the catch member aperture, the first locking pin is positioned within the first locking pin aperture, and the system is in the locked condition, a compressive force is maintained between the version device and the prosthetic humeral implant.

15. The system of claim 1 , wherein the version device includes a plurality of version rod apertures.

16. The system of claim 15 , wherein the version rod apertures are threaded apertures configured to mate with a version rod.

17. The system of claim 15 , wherein each of the plurality of version rod apertures are angled differently than each other version rod aperture.

18. The system of claim 1 , wherein the plate includes a first slot and the version device includes a first plate pin positioned within the first slot.

19. The system of claim 18 , wherein the first plate pin guides movement of the plate between the first position of the plate and the second position of the plate.

20. The system of claim 1 , wherein the prosthetic humeral implant is a permanent implant stem, and the system further includes a trial stem including a trial catch member aperture adapted to mate with the catch member, and a trial first locking pin aperture adapted to mate with the first locking pin aperture, the permanent implant stem including a plurality of height indicia corresponding to a plurality of height indicia of the trial stem.

Assignees

• Howmedica Osteonics Corp

Inventors

• Yadav Rajan

Classifications

• A61F2002/30617

  Visible markings for adjusting, locating or measuring · CPC title

• A61F2002/4668

  for measuring angles · CPC title

• A61F2002/4051

  Connections of heads directly to shafts · CPC title

• A61F2002/30507

  using a threaded locking member, e.g. a locking screw or a set screw · CPC title

• A61F2/4684

  Trial or dummy prostheses · CPC title