Shoulder prosthesis glenoid component

Abstract

This shoulder prosthesis glenoid component ( 2 ) has on one of its faces an articulation surface (S A ) adapted to cooperate with a humeral head and having, on an opposite face (S G ) adapted to be immobilized on the glenoid cavity (G) of a shoulder, a keel ( 4 ) for anchoring it in the glenoid cavity (G). This keel ( 4 ) comprises a body ( 5 ) that extends from the opposite face (S G ). The keel ( 4 ) comprises at least one fin ( 6 ) projecting from the body ( 5 ) which runs over at least a part of the perimeter of the body ( 5 ).

1 . A shoulder prosthesis glenoid component ( 2 ) having on one of its faces an articulation surface (S A ) adapted to cooperate with a humeral head and having, on an opposite face (S G ) adapted to be immobilized on the glenoid cavity (G) of a shoulder, a keel ( 4 ) for anchoring it in the glenoid cavity (G), this keel comprising a body ( 5 ) that extends from said opposite face (S G ), wherein the keel ( 4 ) comprises at least one fin ( 6 ) projecting from the body ( 5 ) which runs over at least a part of the perimeter of the body ( 5 ). 
     
     
         2 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) of the keel ( 4 ) has in cross section a non-circular peripheral contour. 
     
     
         3 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the at least one fin ( 6 ) has a helicoidal shape and winds around the body ( 5 ). 
     
     
         4 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) comprises at least one internal passage ( 22 ) opening onto the external surface of the body ( 5 ) and connected to an orifice ( 24 ) for injecting a fluid. 
     
     
         5 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the at least one fin ( 6 ) extends in a plane substantially perpendicular to a longitudinal main axis (X-X′) of the body ( 5 ). 
     
     
         6 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) comprises at least two separate cylindrical parts ( 52 ,  54 ) the respective axes (A 52 , A 54 ) of which are substantially parallel to each other and between which the at least one fin ( 6 ) extends. 
     
     
         7 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) includes at least one external peripheral groove ( 64 ) for receiving an elastic ring ( 62 ) adapted to expand in the glenoid cavity (G). 
     
     
         8 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) has a star-shaped cross section including at least three branches and the keel ( 4 ) has an eccentric position relative to a central axis (A 70 ) of the component ( 2 ). 
     
     
         9 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the at least one fin ( 6 ) has a substantially semicircular peripheral contour. 
     
     
         10 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the keel ( 4 ) comprises a first series ( 91 ;  101 ) of substantially parallel fins ( 6 ). 
     
     
         11 . The shoulder prosthesis glenoid component according to  claim 10 , wherein the keel ( 4 ) further comprises at least one second series ( 92 ;  102 ) of parallel fins ( 6 ), of width (d 2 ) greater than that (d 1 ) of the first fins ( 91 ;  101 ) and placed at a distance from the opposite face (S G ) along a longitudinal main axis (X-X′) of the body ( 5 ) less than that of the first series of fins. 
     
     
         12 . The shoulder prosthesis glenoid component according to  claim 11 , wherein the fins ( 6 ) of the at least one second series ( 102 ) of fins have a shape that is geometrically similar to the shape of the opposite face (S G ). 
     
     
         13 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the articulation surface (S A ) is carried by an element ( 112 ) adapted to be mounted in a preferably metal shell ( 114 ) of the component ( 2 ) carrying the opposite face (S G ) and in one piece with the body ( 5 ) of the keel ( 4 ). 
     
     
         14 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) of the keel ( 4 ) comprises a flexible sheath ( 120 ) provided with the at least one fin ( 6 ) into which a part ( 121 ) in one piece with the opposite face (S G ) is adapted to fit. 
     
     
         15 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the at least one fin ( 6 ) is made of a deformable material. 
     
     
         16 . The shoulder prosthesis glenoid component according to  claim 1 , wherein the body ( 5 ) of the keel ( 4 ) includes a hole ( 31 ,  128 ) passing through the body ( 5 ).