Intervertebral disc endoprosthesis

Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone

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606 61, A61F 244

Patent

active

055564313

ABSTRACT:
An intervertebral disc endoprosthesis which is to be inserted between two vertebrae and has a bottom plate and a top plate which are to be connected to the endplates, facing them, of the vertebrae additionally has screw fastening facilities in order to increase the security of retention of the prosthesis. These screw fastening facilities are formed, for example, by in each case at least one borehole which runs essentially at right angles to the plane of the bottom or top plate and through which a bone screw can be inserted. The center of articulation of the prosthesis is displaced towards the rear relative to the center of the vertebral endplates in order to achieve a more favorable course of the force and, at the same time, to provide space in the ventral edge area to receive the bone screws.

REFERENCES:
patent: 4636217 (1987-01-01), Ogilvie et al.
patent: 4759769 (1988-07-01), Hedman et al.
patent: 5062850 (1991-11-01), MacMillan et al.
patent: 5147361 (1992-09-01), Ojima et al.
German Search Report DE-P 42 08 115.7.
Karin Buttner-Janz, K. Schellnack, H. Zippel. Eine Alternative Behandlungsstrategie beim lumbalen Bandscheibenschaden . . . Z. Orthop. 125 (1987): 1-6.

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