Modular humeral prosthesis for an inverted shoulder prosthesis

Patent metadata

Field	Value
Publication number	US-11229522-B2
Application number	US-201715455422-A
Country	US
Kind code	B2
Filing date	Mar 10, 2017
Priority date	Oct 25, 2004
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

The invention relates to a modular humeral prosthesis for an inverse shoulder prosthesis, comprising an anatomical shaft (1) and a separable epiphyseal head (2) which may be angularly orientated by rotation about the longitudinal axis (XX) of the anatomical shaft. The anatomical shaft and the epiphyseal head comprise complementary angular indexing means (11, 28) for relative rotational fixation.

First claim

The invention claimed is:

1. A modular humeral prosthesis comprising:
an anatomical stem having a longitudinal axis and including a hole;
a separable epiphyseal head which may be oriented angularly by rotation about the longitudinal axis of the anatomical stem and includes an axial hole;
a first contact surface on the epiphyseal head and a second contact surface on the anatomical stem, the first and second contact surfaces being in contact with each other;
the second contact surface being planar, perpendicular to the longitudinal axis and constituting a proximal extremity of the anatomical stem;
a screw which may pass through the axial hole provided in the epiphyseal head and into the hole in the anatomical stem to connect the epiphyseal head to the anatomical stem;
indicia of rotation between the epiphyseal head and the anatomical stem;
wherein the first contact surface extends laterally beyond the second contact surface of the anatomical stem whatever the angular orientation of the epiphyseal head with respect to the anatomical stem; and
wherein the epiphyseal head comprises a socket for receiving a cup of a reverse shoulder prosthesis cooperating with a scapular prosthesis.

2. The modular humeral prosthesis according to claim 1 and further comprising a plurality of notches provided on the first contact surface disposed according to a radial angular distribution about the longitudinal axis of the anatomical stem, and the anatomical stem includes a peg borne by the second contact surface and capable of cooperating with the notches.

3. The modular humeral prosthesis according to claim 1 , wherein the anatomical stem comprises at least one longitudinal rib for rotational locking.

4. The modular humeral prosthesis according to claim 1 , wherein a junction between the anatomical stem and the epiphyseal head is intended to be located inside a humerus when the prosthesis is in place, in order to take account of deltoid tension.

5. The modular humeral prosthesis according to claim 1 , wherein the indicia of rotation are provided in degrees of rotation.

Assignees

• Depuy Synthes Products Inc
• Depuy Ireland Ultd Co

Inventors

• Nerot Cecile
• Capon Didier
• Seebauer Ludwig
• Ekelund Anders
• De Wilde Lieven
• Wirth Michael
• Collins David
• Lafosse Laurent
• Poncet Didier

Classifications

• A61F2002/30604

  modular · CPC title

• A61F2002/30355

  Cylinder of elliptical or oval basis · CPC title

• A61F2/4059

  Humeral shafts · CPC title

• A61F2002/3054

  about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions · CPC title

• A61F2002/30617

  Visible markings for adjusting, locating or measuring · CPC title