Bone screw with tangential cutting edge

Details Bone screw with tangential cutting edge Bone screw with tangential cutting edge

A - Human Necessities

61

B

A61B 17/58 (2006.01)

Patent

CA 2519952

The invention relates to a bone screw (1) comprising a longitudinal axis (2) and a threaded shaft (15), which has an external thread (3) of an external diameter D<SB>A</SB>, a front thread end (4) and a thread profile (11). The latter (11) has a front thread flank (7) that is oriented towards the front thread end, said front flank (7) comprising on its front thread end (4) a flank section (9) that has a 90~ offset in relation to the front thread flank (7), thus forming a tangential cutting edge (5) on the front thread end (4).

L'invention concerne une vis à os (1) présentant un axe longitudinal (2) et une tige filetée (15) composée d'un filetage extérieur (3) ayant un diamètre extérieur D<SB>A</SB>, d'une extrémité avant de filetage (4), et d'un profilé de filetage (11). Ledit profilé de filetage (11) comporte un flanc de filetage avant (7) orienté vers l'extrémité avant de filetage (4), et le flanc de filetage avant (7) comporte une pièce de flanc (9) au niveau de l'extrémité avant de filetage (4), ladite pièce de flanc étant coudée par rapport au flanc de filetage avant (7) de manière qu'une arête de coupe tangentielle (5) est créée sur l'extrémité avant de filetage (4).

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