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Process for obtaining tissue-protective implants prepared from titanium or a titanium-base microalloy

  • US 5,354,390 A
  • Filed: 03/31/1993
  • Issued: 10/11/1994
  • Est. Priority Date: 04/10/1992
  • Status: Expired due to Fees
First Claim
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1. A process for obtaining tissue-protective devices of bone surgery, especially cheek bone, mandible and common surgery, implants prepared from a medical-purity metal, titanium and/or a titanium-base microalloy containing at least 98% by weight of titanium, by establishing a bio-compatible (tissue-protective) coating on the metal surface of the implant by anodic oxidation after degreasing and chemical or electrochemical etching, which comprises carrying out the anodic oxidation of the implant surface in an aqueous solution of a phosphate concentration lower than 20% by weight with a current density of 2 to 50 mA/cm2 until reaching a voltage of at least 105 V, then, after washing to ion-free, heat-treating the implants at a temperature between 120°

  • C. and 750°

    C. for 5 to 120 minutes, and repeating once or twice the anodic oxidation and heat-treatment with the phosphate concentration, current density and temperature values as given above for the first step.

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