Shoulder implant system

Patent metadata

Field	Value
Publication number	US-9433508-B2
Application number	US-201314030484-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Sep 21, 2012
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

Art apparatus can include a humeral stem. A glenosphere can be configured to be mountable to the humeral stem. The glenosphere can be adapted to operate with a complementary glenoid component. The humeral stem can include a removable taper member on a side of the humeral stem facing the glenosphere. The taper member can be configured to mount the glenosphere to the humeral stem.

First claim

The claimed invention is:

1. A shoulder prosthesis comprising:
a glenoid component configured to be mounted to a glenoid, the glenoid component located on a base plate;
a humeral stem including a stem portion and a glenosphere attachment portion, the glenosphere attachment portion having a threaded attachment post integrally formed therewith and extending away from a surface of the glenosphere attachment portion, the threads of the attachment rod being exposed;
a removable taper member removably attached to the attachment post of the humeral stem, the taper member being generally cylindrical with a tapered outer surface, the taper member adapted to being mounted over the threads of the attachment post and un-mounted from the attachment post; and
a glenosphere mounted to the taper member, the glenosphere including a corresponding taper region comprising a shape and length complementary to a shape and length of the taper member, said corresponding taper region receiving the taper member,
wherein the removable taper member is configured to mount the glenosphere to the attachment portion of the humeral stem, and wherein the glenosphere is adapted to operate with the glenoid component,
wherein the threaded attachment post is defined by a threaded rod and the taper member includes a mating threaded hole extending therethrough, the threaded hole engaging the threads of the threaded rod,
wherein the threaded rod further includes an unthreaded lead-in section dimensioned to promote axial alignment of the taper member relative to the threaded rod.

2. The shoulder prosthesis of claim 1 , wherein the base plate includes a stem extending from a first side of the base plate.

3. The shoulder prosthesis of claim 1 , wherein the taper member includes a 60 degree Morse taper region.

Assignees

• Zimmer Inc

Inventors

• Phipps James P

Classifications

• A61F2002/30332

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

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title

• A61F2/4059

  Humeral shafts · CPC title

• A61F2/4014 Primary

  Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts · CPC title

• A61F2002/4018

  Heads or epiphyseal parts of humerus · CPC title