Production of porous coating on a prosthesis
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United States of America Patent
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Feb 24, 1987
Issued Date -
N/A
app pub date -
Jan 9, 1984
filing date -
Jul 27, 1981
priority date (Note) -
Expired
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Abstract
Preselected surface areas of a prosthesis are covered by a blend of matching primary metallic particles and expendable particles. The particles are compressed and heated to assure that deformation and metallurgical bonding occurs between them and between the primary particles and the surface boundaries of the prosthesis. Porosity is achieved by removal of the expendable material. The result is a coating including discrete bonded particles separated by a network of interconnected voids presenting a homogeneous porous coating about the substrate. It has strength suitable for bone implant usage without intermediate adhesives, and adequate porosity to promote subsequent bone ingrowth.
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