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US 5,711,763 AGranted
Composite biological implant of a ceramic material in a metal substrate
AssigneeTDK Corporation
InventorsTohru Nonami, Naoyoshi Satoh
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Abstract
A composite biotic implant of the invention is prepared by coating a metal substrate with ceramic particles preferably having bio-compatibility, and plastic working the coated substrate to cause plastic deformation of the metal substrate, thereby embedding the ceramic particles in a surface layer of the metal substrate. Optionally, ceramic material having bio-compatibility is coated over the surface of the ceramic particle embedded substrate. A composite implant exhibiting a firm bond is thus obtained.
Claims16
A composite biotic implant prepared by a process comprising:
- placing ceramic particles made of diopside, wollastonite or combination thereof, having a mean particle size ranging from 1 to 5,000 .mu.m and having an average shape factor of up to 2 on a surface layer of a metal substrate;
- and
- embedding said ceramic particles in the metal substrate to the extent of 40-75% of the ceramic particle size by plastic working, thereby forming an embedment layer, said composite implant having a surface roughness Ra ranges from 1 to 2,000 .mu.m.
Dependencies are inferred from the claim text.