Intervertebral prosthesis comprising self-tapping fixing...

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01)

Patent

CA 2598018

The invention relates to an intervertebral prosthesis, in particular for the cervical spine, comprising two articulated connection plates. The connection surfaces of the connection plates, which can be connected to the adjacent vertebral body, comprise a base surface (3) which is to be applied to the surface of the vertebral body and comprises self-tapping fixing projections which can be raised therefrom. According to the invention, the self-tapping fixing projections are formed from at least one pair of ribs (4), which extend in the opposite direction, diagonal to the predetermined direction of implantation (2) and the lateral surfaces (5) thereof which are used counter to the direction of implantation are steeper than the lateral surfaces (6) thereof used in the direction of implantation (6). The ribs can be toothed.

L'invention concerne une prothèse intervertébrale conçue en particulier pour le rachis cervical, comprenant deux plaques de connexion reliées de manière articulée. Les surfaces de connexion des plaques de connexion qui sont configurées pour être reliées au corps vertébral adjacent comportent une surface de base spécifique (3) destinée à reposer contre la surface du corps vertébral, ainsi que des structures saillantes de fixation autotaraudeuses qui s'élèvent à partir de ladite surface de base. Selon l'invention, ces structures saillantes sont constituées d'au moins une paire de nervures (4) qui s'étendent en sens inverse, de manière oblique par rapport à une direction d'implantation prédéterminée (2), et dont les surfaces latérales (5) qui sont plutôt orientées dans une direction opposée à la direction d'implantation présentent une pente plus élevée que les surfaces latérales (6) qui sont plutôt orientées dans la direction d'implantation. Lesdites nervures peuvent être dentées.

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