Processing of hydroxylapatite coatings on titanium alloy bone prostheses
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Dec 1, 1995
filing date -
Dec 1, 1995
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Expired
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Abstract
Processing of hydroxylapatite sol-gel films on titanium alloy bone prostheses. A method utilizing non-line-of-sight ion beam implantation and/or rapid thermal processing to provide improved bonding of layers of hydroxylapatite to titanium alloy substrates while encouraging bone ingrowth into the hydroxylapatite layers located away from the substrate, is described for the fabrication of prostheses. The first layer of hydroxylapatite is mixed into the substrate by the ions or rapidly thermally annealed, while subsequent layers are heat treated or densified using ion implantation to form layers of decreasing density and larger crystallization, with the outermost layers being suitable for bone ingrowth.
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