SHOULDER PROSTHESIS GLENOID COMPONENT
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 ).