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Biocompatible low modulus titanium alloy for medical implants

  • US 5,169,597 A
  • Filed: 01/28/1991
  • Issued: 12/08/1992
  • Est. Priority Date: 12/21/1989
  • Status: Expired due to Term
First Claim
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1. In a human body wherein orthopedic implants remain for a prolonged period of time and must maintain strength and flexibility while being subjected to sustained corrosive effects of body fluids resulting in release of toxic or potentially toxic ions into surrounding tissue, the improvement wherein the implant has the alloy composition comprising:

  • from about 10 to about 20 wt. % niobium or from about 35 to about 50 wt. % niobium;

    from about 13 to about 20 wt. % zirconium; and

    the balance titanium;

    said alloy composition excluding metal ions harmful to the human body and having a modulus of elasticity of less than 85 GPa.

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