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AssigneeMemometal Technologies
InventorsPhilippe Bellemere, Thierry Dreano, Jean Goubau, Xavier Martinache, Michaël Papaloizos, Bernard Prandi, Pierre Siret, Alain Tchurukdichian
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An orthopaedic implant (2) used in arthroplasty of the fingers comprises a first element (3) for a proximal phalanx (4) and a second element (5) for an adjacent distal phalanx (6), each element having a respective stem (7, 8) for implantation in the bone and an interphalangeal articulation head (9, 10), the head (9) of the first element having a biconvex surface (11) of articulation, with a central valley (12), and the head (10) of the second element having a biconcave surface (13) of articulation designed to cooperate with said convex surface and comprising a central crest (14). At rest, the surfaces (11, 13) are congruent in the frontal plane of the articulation in the area of the condyles and non-congruent in the sagittal plane.
An orthopedic implant used in arthroplasty of the fingers, comprising a first element for a proximal phalanx and a second element for an adjacent distal phalanx, each element having a respective stem for implantation in the bone and an interphalangeal pivot head, the head of the first element having a biconvex condylar pivot surface having a central valley, and the head of the second element having a biconcave pivot surface designed to fit generally complementarily with the biconvex surface and having a central ridge, wherein the surfaces at rest are congruent in a frontal plane of the pivot in the area of the condyles and are not congruent in the sagittal plane.
Dependencies are inferred from the claim text.