Importance

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Abstract

A spinal implant includes two connection plates dimensioned for connection to adjacent vertebral bodies and a hinge core. The hinge core together with one connection plate forms a hinge between a generally spherical hinge extending from the one connection plate into an opening of a generally spherical depression in the hinge core. The opening is dimensioned to be elastically deformed to allow passage of the generally spherical hinge into the generally spherical depression. The hinge core bears on a slide surface which extends substantially parallel to the direction of the other connection plate and permits relative translatory movement of the hinge core. The walled receiving area limits this relative translatory movement of the hinge core. The stability of the spinal implant with respect to laterally incident forces is increased.

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First Claim