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US 4,846,840 AGranted
Joint prosthesis
OwnerSylvain Leclercq, Jacques Aubriot +1inventors
InventorsSylvain Leclercq, Jacques Aubriot, Vincent Mercier
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Abstract
The joint prosthesis according to the invention is characterized in that it comprises two substantially concentric convex opposite surface portions (1, 2). Preferably the convex surface portions are portions of a sphere which are connected together by a frustoconical portion (3) and one (1) of the convex surface portions has a greater radius of curvature than the other (2).
Claims7
A hip joint prosthesis adapted for disposition between the pelvic bone and the femoral head of a hip joint, comprising:
- (1) a first convex surface portion adapted for rotatable disposition in a cavity formed in the femoral head;
- (2) a second convex surface portion adapted for rotatable disposition in a cvity formed in the pelvic bone and which is convex in a direction opposite to the convex direction of the said first convex surface portion;
- (3) a third portion disposed between and immovably affixed to said first and second convex surface portions;
- and wherein the radius of curvature of the first convex surface portion is smaller than that of the second convex surface portion.
1 more element
Dependencies are inferred from the claim text.