Occipito-cervical osteosynthesis instrumentation

Details Occipito-cervical osteosynthesis instrumentation Occipito-cervical osteosynthesis instrumentation

A - Human Necessities

61

B

A61B 17/60 (2006.01) A61B 17/70 (2006.01)

Patent

CA 2183563

The instrumentation comprises two separate similar parts, namely a right part (1) and a left part (2), each formed by a cervical rod (3) having asperities and an elongate occipital plate (5) formine one piece with the rod and extending it toward the occiput (6) in the position of use, and adjustable means for anchoring the rod to the vertebrae and the plate to the occiput. Each part is so preangulated and shaped as to be adapted to the anatomy of the occipito-cervical connection. Each rod (3) has two rectilinear sections making therebetween an angle of between about 70 and 90°, one of the sections being connected to the occipital plate (5), which is bent so as to correspond to the curvature of the occipital shell. The invention permits conveniently adapting the distance between the rods (3) to the anatomy of the patient and reduces the overall size of the instrumentation, which enables projections under the skin of the occiput to be considerably reduced.

Les instruments comprennent deux parties identiques séparées, à savoir une partie droite (1) et une partie gauche (2), chacune d'elles consistant en une tige cervicale (3) présentant des aspérités et en une plaque occipitale (5) de forme allongée faisant corps avec la tige et la prolongeant vers l'occiput (6) pour atteindre la position fonctionnelle, ainsi que des éléments réglables permettant de fixer la tige aux vertèbres et la plaque à l'occiput. Chacune des parties est courbée selon un angle prédéterminé et a une forme telle qu'elle peut s'adapter à l'anatomie de la jonction occipito-cervicale. Chaque tige (3) possède deux sections rectilignes faisant entre elles un angle d'entre environ 70~ et 90~, l'une des sections étant reliée à la plaque occipitale (5), courbée pour épouser la courbure de l'enveloppe occipitale. L'invention permet d'adapter commodément la distance entre les tiges (3) à l'anatomie du patient et réduit la taille globale des instruments, ce qui permet de diminuer considérablement les saillies sous la peau de l'occiput.

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