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Surgical prosthetic device or implant having pure metal porous coating

  • US 4,206,516 A
  • Filed: 12/07/1977
  • Issued: 06/10/1980
  • Est. Priority Date: 12/15/1976
  • Status: Expired due to Term
First Claim
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1. A surgical prosthetic device or implant comprising a composite structure consisting of a coherent solid metal substrate and a porous coating of at least one pure metal adhered to and extending over at least part of the surface of said substrate to a thickness of at least about 100 microns and having a porosity of about 10 to about 40% , said metal and pure metal being substantially non-corrodable and non-degradable by body fluids,said porous coating having an irregular surface and a plurality of connected interstitial pores substantially uniformly distributed therethrough, said porous coating being formed by thermal decomposition of particles of at least one thermally-decomposable compound of said at least one pure metal and sintering of the thermally decomposed particles to cause bonding of the resulting irregularly-shaped pure metal particles to each other and to said substrate at their points of contact therewith,said particles of pure metal compound having a size at least sufficient to provide interstitial pores in said coating and the surface thereof which will permit the growth of bone tissue into said coating.

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