Bone screw

Details Bone screw Bone screw

A - Human Necessities

61

B

A61B 17/58 (2006.01) A61B 17/86 (2006.01)

Patent

CA 2057957

A bone screw (1) has a screw head (2), a screw tip (11), and a shaft (5) with a thread (8,14). The threaded segment (6,7) of the shaft (5) has a head-end, essentially cylindrical first shaft section (6) with minor diameter d1 (16), and a tip-end second shaft segment (7) that is connected with the first shaft segment (6) and which has a smaller minor diameter d2 (17). The thread (8,14) in the two shaft segments (6,7) has the same pitch (10,12).

L'invention porte sur une vis à os (1) composée d'une tête (2), d'une pointe (11) et d'une tige (5) filetée (8, 14). Le segment fileté (6, 7) de la tige (5) comporte un premier segment de tige extrémité tête (6), essentiellement cylindrique, ayant un diamètre intérieur d1 (16), et un second segment de tige extrémité pointe (7) relié au premier segment de tige (6) et présentant un plus petit diamètre intérieur d2 (17). En outre, l'inclinaison (10, 12) du filetage (8, 14) des deux segments de tige (6, 7) est la même.

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