Bone plate

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/80 (2006.01) A61B 17/72 (2006.01)

Patent

CA 2545019

The invention relates to a bone plate (1), having an upper side (2), a bone- sided lower side (3), a first end (11), a second end (12) and several plate holes (4), arranged between both ends (11, 12) and connecting the upper side (2) to the lower side (3), said holes being provided for receiving bone screws. Two of said plate holes (4) are made of a combination of two partially overlapping drillings (5, 6) of different type. The first (5) of both drillings is a circular cylindrical drilling, having an internal thread (7) and a cylinder axis (9). The second drilling (6) has a cone axis (10) and tapers from the upper side (2) to the lower side (3) in the form of a frustum. Said second drilling (6) is provided with an internal thread (8). The cylinder axis (9) is situated at a distance A from the cone axis (10), which is different from zero.

L'invention concerne une plaque d'ostéosynthèse (1) présentant une face supérieure (2), une face inférieure (3) côté os, une première extrémité (11), une seconde extrémité (12) ainsi que plusieurs trous (4), formés entre les deux extrémités (11, 12) et reliant la face supérieure (2) à la face inférieure (3), lesquels trous sont destinés à recevoir des vis à os. Deux des trous (4) de plaque sont constitués d'une combinaison de deux alésages (5, 6) de type différent, se chevauchant partiellement. Le premier (5) des deux alésages est un alésage cylindrique circulaire, à taraudage (7) et pourvu d'un axe (9) de cylindre. Le second (6) des deux alésages présente un axe (10) de cône et le diamètre de cet alésage diminue en cône tronqué de la face supérieure (2) à la face inférieure (3). Ce second alésage (6) est pourvu d'un taraudage (8). L'axe (9) de cylindre se trouve à une distance A de l'axe (10) de cône, dont la valeur est différente de zéro.

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