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Metal-ceramic composite articulation

  • US 6,881,229 B2
  • Filed: 06/13/2002
  • Issued: 04/19/2005
  • Est. Priority Date: 06/14/2001
  • Status: Expired due to Term
First Claim
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1. A joint prosthesis for articulation, comprising:

  • a first component shaped as a cup prosthesis and having a generally concave articulation surface formed from a biocompatible doped silicon nitride ceramic having a flexural strength greater than about 700 Mega-Pascal (MPa) and a toughness greater than about 7 Mega-Pascal root meter (MPam0.5); and

    a second component shaped as a head prosthesis and having a generally convex articulation surface formed from a biocompatible cobalt chromium metal alloy.

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