Adjustable humeral tray for shoulder arthroplasty

Patent metadata

Field	Value
Publication number	US-9566162-B2
Application number	US-201514636770-A
Country	US
Kind code	B2
Filing date	Mar 3, 2015
Priority date	Mar 3, 2015
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An adjustable humeral implant includes a humeral tray and a humeral coupler. The humeral tray includes a humeral coupler receiving portion. The humeral coupler includes a humeral tray mating portion and a stem portion extending from the humeral tray mating portion along a first axis. The humeral tray mating portion is translatable within the humeral coupler receiving portion in a direction transverse to the first axis.

First claim

What is claimed is:

1. An adjustable humeral implant comprising:
a humeral tray having a humeral coupler receiving portion and first and second apertures in communication with the humeral coupler receiving portion;
a humeral coupler having a humeral tray mating portion and a stem portion extending from the humeral tray mating portion along a first axis, the humeral tray mating portion translatable within the humeral coupler receiving portion in a direction transverse to the first axis;
an adjustment member slidably received by an inferior edge of the humeral tray mating portion and within the first aperture; and
a lock member slidably received by a superior edge of the humeral tray mating portion and within the second aperture.

2. The adjustable humeral implant of claim 1 , wherein the humeral coupler receiving portion defines a channel, and wherein the humeral tray mating portion is operable to translate within the channel.

3. The adjustable humeral implant of claim 1 , wherein the humeral tray mating portion translates within the humeral coupler receiving portion in a direction substantially perpendicular to the first axis.

4. The adjustable humeral implant of claim 1 , wherein the first and second apertures include first and second openings, respectively, in an exterior peripheral surface of the humeral tray.

5. The adjustable humeral implant of claim 1 , wherein the humeral coupler is rotatably received within the humeral coupler receiving portion.

6. The adjustable humeral implant of claim 5 , wherein the humeral coupler is rotatable within the humeral coupler receiving portion about the first axis and translatable within the humeral coupler receiving portion in a direction substantially perpendicular to the first axis.

7. The adjustable humeral implant of claim 1 , wherein the humeral tray mating portion is press-fit within the humeral coupler receiving portion.

8. The adjustable humeral implant of claim 1 , wherein the stem portion includes a male taper and the humeral coupler receiving portion includes a female taper, and wherein the male taper is configured to frictionally engage the female taper.

9. An adjustable humeral implant comprising:
a humeral coupler having a base and a stem extending from the base along a longitudinal axis; and
a humeral tray having a glenosphere-facing side and an opposed humerus-facing side, the humerus-facing side including a recess at least partially defined by a bottom surface and opposed flanges, the recess configured to slidably receive the base of the humeral coupler such that the opposed flanges secure the base within the recess,
wherein the base is translatable within the recess in a direction substantially perpendicular to the longitudinal axis,
wherein the humeral coupler is rotatably received by the recess for rotation about the longitudinal axis.

10. The adjustable humeral implant of claim 9 , further comprising an adjustment member and a lock member, the adjustment member slidably received by an inferior edge of the humeral coupler, the lock member slidably received by a superior edge of the humeral coupler.

11. The adjustable humeral implant of claim 10 , wherein the humeral tray includes first and second apertures in communication with the recess and configured to receive the adjustment member and the lock member, respectively.

12. The adjustable humeral implant of claim 11 , wherein the first and second apertures include first and second openings, respectively, in an exterior peripheral surface of the humeral tray.

13. A method of assembling an adjustable humeral implant including a humeral tray and a humeral coupler configured to translate relative to the humeral tray, the method including:
inserting a stem into a humerus having a cut surface, the stem extending from a base of the humeral coupler along a longitudinal axis, the base translatable within a recess of the humeral tray in a direction substantially perpendicular to the longitudinal axis;
rotating the humeral coupler about the longitudinal axis of the stem;
translating the humeral tray relative to the humeral coupler in a direction substantially parallel to the cut surface from a first position to a second position; and
securing the humeral tray in the second position.

14. The method of claim 13 , wherein securing the humeral tray in the second position includes:
inserting an adjustment member and a lock member into the humeral tray, the adjustment member slidably received by an inferior edge of the humeral coupler, and the lock member slidably received by a superior edge of the humeral coupler.

15. The method of claim 13 , wherein securing the humeral tray in the second position includes press-fitting the humeral coupler to the humeral tray.

16. The method of claim 13 , further comprising:
determining a first overhang distance of the humeral tray relative to the cut surface in the first position; and
determining a second overhang distance of the humeral tray relative to the cut surface in the second position, wherein the second overhang distance is less than the first overhang distance.

Assignees

• Biomet Mfg Llc

Inventors

• Isch Bryce

Classifications

• A61F2/4612

  of shoulders · CPC title

• A61F2002/30331

  made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit · CPC title

• A61F2/4003 Primary

  Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft (replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601) · CPC title

• A61F2002/30332

  Conically- or frustoconically-shaped protrusion and recess · CPC title

• A61F2002/30594

  slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots · CPC title