Stemless humeral anchoring component for a shoulder prosthesis humeral implant

Abstract

A stemless humeral anchoring component for a shoulder prosthesis humeral implant includes an anchoring stud secured to anchoring wings extending radially along the periphery of the anchoring stud. The anchoring wings include a lateral anchoring wing and two medial anchoring wings angularly spaced by an angle between 110 and 130 degrees. The lateral anchoring wing has a radially measured length greater than the radially measured lengths of the medial anchoring wings.

What is claimed is: 
     
         1 . A stemless humeral anchoring component for a shoulder prosthesis humeral implant, the stemless humeral anchoring component comprising an anchoring stud secured to anchoring wings extending radially along a periphery of the anchoring stud, wherein the anchoring wings comprise a lateral anchoring wing and two medial anchoring wings, the anchoring wings being angularly spaced by an angle between 110 and 130 degrees, and the lateral anchoring wing having a length greater than a length of each medial anchoring wing. 
     
     
         2 . The stemless humeral anchoring component according to  claim 1 , wherein the two medial anchoring wings have the same length. 
     
     
         3 . The stemless humeral anchoring component according to  claim 1 , wherein a ratio between the length of the lateral anchoring wing and the length of a medial anchoring wing of the two medial anchoring wings is between 1.1 and 1.3. 
     
     
         4 . The stemless humeral anchoring component according to  claim 3 , wherein the anchoring stud is a body of revolution centered on a central axis and the length of the anchoring wings are measured radially from the central axis, wherein the length of the lateral anchoring wing is between 15 and 25 millimeters and the length of each medial anchoring wing is between 11.5 and 22.5 millimeters. 
     
     
         5 . The stemless humeral anchoring component according  claim 1 , wherein the anchoring wings are angularly spaced by an angle of 120 degrees ±2 degrees. 
     
     
         6 . The stemless humeral anchoring component according to  claim 1 , wherein the anchoring wings are perforated. 
     
     
         7 . The stemless humeral anchoring component according to  claim 1 , wherein each anchoring wing comprises:
 a rectilinear segment extending radially from a peripheral proximal portion of the anchoring stud; and   a curved segment connecting a termination of the rectilinear segment to a peripheral distal portion of the anchoring stud.   
     
     
         8 . The stemless humeral anchoring component according to  claim 7 , wherein the peripheral proximal portion of the anchoring stud is formed of a peripheral proximal end edge of the anchoring stud. 
     
     
         9 . The stemless humeral anchoring component according to  claim 7 , wherein the peripheral distal portion of the anchoring stud is formed of a peripheral distal end edge of the anchoring stud. 
     
     
         10 . The stemless humeral anchoring component according to  claim 1 , wherein the anchoring stud is hollow and defines an inner orifice. 
     
     
         11 . The stemless humeral anchoring component according to  claim 10 , wherein the inner orifice has a frustoconical proximal hole extended by a tapped hole. 
     
     
         12 . The stemless humeral anchoring component according to  claim 1 , wherein the anchoring stud has a frustoconical shape. 
     
     
         13 . A shoulder prosthesis humeral implant comprising a stemless humeral anchoring component according to  claim 1 , and a humeral insert fastened on the stemless humeral anchoring component and having a hemispherical cap shaped for a joint with a glenosphere of a glenoid implant or a spherical joint head shaped for a joint on a joint body of the glenoid implant. 
     
     
         14 . A shoulder prosthesis comprising a shoulder prosthesis humeral implant according to  claim 13 , and a glenoid implant comprising a glenosphere shaped for a joint with the hemispherical cap of the humeral insert or a joint body shaped for a joint with the spherical joint head of the humeral insert. 
     
     
         15 . A range of stemless humeral anchoring components comprising a plurality of stemless humeral anchoring components according to  claim 1 , each of the plurality of stemless humeral anchoring components being a different size.