Orthopaedic implant for arthroplasty of the fingers

US8858644B2 · kind B2 · utility

Assignee

• MEMOMETAL TECHNOLOGIES · FR

Inventors

• Jean Goubau · Loppem, BE
• Xavier Martinache · Reims, FR
• Michaël Papaloïzos · Worb, CH
• Philippe Bellemere · Nantes, FR
• Thierry Dreano · Rennes, FR
• Bernard Prandi · Rennes, FR
• Pierre Siret · Talensac, FR
• Alain Tchurukdichian · Dijon, FR

Key dates

• Filing date: Jan 8, 2010
• Grant date: Oct 14, 2014
• Expiry date: Jan 8, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/4251
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An orthopaedic implant used in arthroplasty of the fingers comprises 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 articulation head, the head of the first element having a biconvex surface of articulation, with a central valley, and the head of the second element having a biconcave surface of articulation designed to cooperate with said convex surface and comprising a central crest. At rest, the surfaces are congruent in the frontal plane of the articulation in the area of the condyles and non-congruent in the sagittal plane.