Coating processes – Medical or dental purpose product; parts; subcombinations;... – Implantable permanent prosthesis
Patent
1996-12-30
1999-01-05
Padgett, Marianne
Coating processes
Medical or dental purpose product; parts; subcombinations;...
Implantable permanent prosthesis
427529, 427528, 427526, 623 16, B05D 300, C23C 1408, A61F 228
Patent
active
058559507
ABSTRACT:
A method is disclosed for ion beam treating orthopaedic parts by ion implanting the parts with aluminum ions while the parts are immersed in an oxygen-containing background gas. When the parts are at sufficiently elevated temperature, a highly adherent layer of aluminum oxide is grown which provides a low friction, low wear articulating surface. The interface between the semi-pure aluminum oxide and the substrate orthopaedic part consists of a composition which gradually grades with depth between the grown aluminum oxide and the pure substrate material. This interface has a thickness dependent on the processing parameters, typically hundreds of Angstroms. In an alternative embodiment, the thickness of the alumina layer may be increased by simultaneously depositing aluminum oxide on the parts.
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Implant Sciences Corporation
Padgett Marianne
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