Artificial facet joint

Details Artificial facet joint Artificial facet joint

1995-03-16

1996-11-05

Jones, Mary Beth

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

606 61, A61F 244

Patent

active

055711910

ABSTRACT:
A spinal facet prosthesis for a diseased or painful facet joint comprises a superior component and an inferior component. The superior component is roughly conical or pyramidal in form and is fastened to and over the distal tip of the inferior articular process of the diseased or painful facet joint. The inferior component is also roughly conical or pyramidal in form with one side elongated postero-medially and distally. The outer surface of the elongated side of the inferior component is of low friction, such as polished chromium coating or medical grade high-density polyethylene. The inferior component is fastened to and over the superior articular process of the diseased or painful facet joint. Each component is made of a biocompatible material. The inner surface of each component which is in contact with its respective articular process is coated with a porous coating to enhance the adhesion of each component to its respective articular process.

REFERENCES:
patent: 3643658 (1969-08-01), Steineman
patent: 4309777 (1980-11-01), Patil
patent: 4502161 (1985-03-01), Wall
patent: 5062850 (1991-11-01), McMillan et al.
patent: 5071437 (1991-12-01), Steffee

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