Surgical implants and method

Details Surgical implants and method Surgical implants and method

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.

REFERENCES:
patent: 3900636 (1975-08-01), Curry et al.
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.

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