Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1996-02-02
1997-06-17
Weiss, John G.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, 623 20, 623 23, A61F 232
Patent
active
056392800
ABSTRACT:
The hip cup of this invention includes a porous metal outer shell, preferably formed from fiber metal, and a compression molded polyethylene component defining an articulating surface at its center for contact with a prosthetic femoral head. The porous outer shell is placed within a mold and the polyethylene component is compression molded within the shell. To prevent the porous shell from collapsing or distorting about its equatorial edge (and thereby distorting the articulating surface) a constraining ring is fitted over the edge of the shell prior to the molding of the polyethylene component. The ring is held in contact with the shell by the molded polyethylene. The constraining ring prevents the edges of the shell from radially distorting during impaction into a prepared acetabulum or during use.
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Gilbert Stephen G.
Warner David B.
Cuddihy Francis K.
Dawson Todd A.
Weiss John G.
Zimmer Inc.
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