Ring for an angulation osteosynthesis device and...

Details Ring for an angulation osteosynthesis device and... Ring for an angulation osteosynthesis device and...

A - Human Necessities

61

B

A61B 17/70 (2006.01) A61B 17/58 (2006.01)

Patent

CA 2282671

The invention concerns an osteosynthesis device, in particular for the spine, comprising an outer spherical surface and a substantially cylindrical inner surface, designed to receive a rod (21) of the device. The invention is characterised in that the ring consists of two matching parts (10) each being U-shaped and having a bottom (11) and a pair of branches (12b) taking up a fraction of the axial dimension of the bottom. The distance between the branches is about the same as that of the rod diameter, their respective bottoms facing each other enclosing the rod, and their pairs of branches adjacent. The parts jointly define the outer and inner surfaces. The invention is applicable to linkages adjustable at different angles.

Une bague pour un dispositif d'ostéosynthèse notamment du rachis comprend une face extérieure sphérique et une face intérieure essentiellement cylindrique, destinée à recevoir une tige (21) du dispositif. Selon l'invention, la bague est réalisée en deux pièces complémentaires (10) présentant chacune la forme d'un "U" avec un fond (11) et une paire de branches (12b) occupant une fraction de la dimension axiale du fond. La distance entre les branches est voisine du diamètre de la tige. Les pièces sont insérées latéralement sur la tige, leurs fonds respectifs se trouvant à l'opposé l'un de l'autre en emprisonnant la tige, et leurs paires de branches se trouvant côte-à-côte. Les pièces définissent conjointement la face extérieure et la face intérieure. Application aux liaisons angulairement réglables.

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