Coating processes – Medical or dental purpose product; parts; subcombinations;... – Implantable permanent prosthesis
Patent
1994-03-29
1997-01-14
Padgett, Marianne
Coating processes
Medical or dental purpose product; parts; subcombinations;...
Implantable permanent prosthesis
427525, 427527, 427530, 427528, 427296, 427307, 216 83, 623 18, 623 19, 623 20, 623 22, B05D 300, A61F 230, C23C 1412, B29C 3700
Patent
active
055937195
ABSTRACT:
The present invention provides methods for modifying surfaces made from metal alloy and/or UHMWPE, preferably surfaces which are frictionally engaged, e.g., in an orthopaedic implant. The methods of the present invention reduce the coefficient of friction of the metal alloy component, reduce the shearing of fibrils from the UHMWPE component, and reduce sub-surface fatigue in the UHMWPE component. The method involves solvent immersion of the UHMWPE component to remove short chains of polyethylene at or near the surface of the component, and to swell and toughen the subsurface of the component. The method also involves firmly coating the surface of the metal alloy component with an adherent layer of diamond-like carbon ("DLC") by creating a metal-silicide interface at the surface of the metal alloy to permit firmer adhesion of DLC. Although the methods of the present invention are particularly useful in orthopaedic applications, the methods also can be used to treat similar components used in other applications.
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Dearnaley Geoffrey
Lankford, Jr. James
Padgett Marianne
Southwest Research Institute
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