Bone screw

Details Bone screw Bone screw

A - Human Necessities

61

B

A61B 17/86 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2744392

The invention relates to a bone screw having a screw shaft (15) comprising a point (13) and concentric to a longitudinal axis (27) of the screw, and that can be anchored in a bone or part of a bone. A screw head (14) is attached to the screw shaft (15). The screw shaft (15) is substantially made of a plastic transparent to X-rays. A part (5, 7, 9, 24) of the screw shaft (15) is made of a different material than that of a core (3, 30) substantially forming the screw shaft (15). The at least one load-bearing area (5, 7, 9, 24) is preferably made of metal or plastic, such as PEEK.

L'invention concerne une vis d'ostéosynthèse qui a une tige filetée (15) présentant une pointe (13) et qui est concentrique à un axe longitudinal de vis (27) et qui est à ancrer dans un os ou une partie d'os. Une tête de vis (14) est fixée à la tige de vis (15). La tige de vis (15) est fabriquée essentiellement dans une matière plastique transparente aux rayons X. Une partie (5, 7, 9, 24) de la tige de vis (15) est fabriquée dans une matière plastique autre que celle d'un noyau (3, 30) qui forme essentiellement la tige de vis (15). La zone porteuse de charge (5, 7, 9, 24) est de préférence fabriquée en métal ou en matière plastique, par exemple du PEEK.

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