Improved bone screw for use in orthopaedic surgery

Details Improved bone screw for use in orthopaedic surgery Improved bone screw for use in orthopaedic surgery

A - Human Necessities

61

B

A61B 17/86 (2006.01) F16B 25/10 (2006.01)

Patent

CA 2369112

The invention relates to an improved bone screw for use in orthopaedic surgery, in particular with external fracture fixation devices, of the type which comprises a head (3), a shank (4), and a threaded portion (5) tapering towards a tip (2) at the opposite end from the head (3). Advantageously, the threaded portion (5) has at least one constant pitch section comprising threads (9) which have a triangular cusp-like profile in cross-section and are separated from each other by a shaped bottom land with a concave profile (10) defined by two countersloping planes.

L'invention concerne une vis à os améliorée destinée à être utilisée en chirurgie orthopédique, notamment avec des fixateurs externes, du type constitué d'une tête (3), d'une tige (4) et d'une partie filetée décroissante (5) aboutissant à une pointe (2) à l'opposé de la tête (3). Avantageusement, la partie filetée (5) comporte au moins une partie à pas constant comprenant des filetages(9) qui présentent un profil du type à pointes triangulaires sur la section transversale et qui sont séparés entre eux par une vallée profilée présentant un profil concave (10) défini par deux plans en contre-pente.

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