Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1990-11-28
1992-06-23
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 66, A61F 228
Patent
active
051239248
ABSTRACT:
An improved surgical implant, formed of cobalt-chromium and its alloys in contact with a bearing surface formed by UHMWPE, and a process of its manufacture are disclosed. The improved surgical implant is designed to reduce the wear of the UHMPE component of the surgical implant, enhancing its useful life. The process essentially includes the ion implantation of the cobalt-chromium component, with a resultant increase in its microhardness and a decrease in its coefficient of friction, particularly when articulating against the UHMWPE component.
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patent: 3925116 (1975-12-01), Engel
patent: 4465524 (1984-08-01), Dearnaley et al.
patent: 4490190 (1984-12-01), Speri
patent: 4568396 (1986-02-01), Vardiman
patent: 4693760 (1987-09-01), Sioshansi
patent: 4743308 (1988-05-01), Sionshansi et al.
patent: 4743493 (1988-05-01), Sioshansi et al.
Sioshansi Piran
Tobin Eric J.
Brittingham Debra S.
Isabella David
Spire Corporation
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