Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1993-03-24
1996-04-23
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, 623 23, 606 72, 606 60, 606 69, A61F 228, A61F 500, A61F 236
Patent
active
055099335
ABSTRACT:
Biocompatible medical implants from a high strength, low modulus, hot worked titanium alloy containing titanium, about 10-20 wt. % or 35 to about 50 wt. % niobium and up to 20 wt. % zirconium. In particular, the titanium implants have a modulus of elasticity closer to that of bone than other typically used metal alloys and does not include any elements which have been shown or suggested as having short or long term potential adverse effects from a standpoint of biocompatibility. To fabricate the alloy, it is necessary to heat to above the .beta.-transus temperature (or to a temperature in a range from 100.degree. C. below and up to the .beta.-transus), hot work the alloy, rapidly cool to below the .beta.-transus, and age the cooled alloy for a period of time to develop its strength while maintaining its low modulus (less than about 90 GPa). The alloy is suitable for a range of uses where the properties of low modulus, high strength and corrosion resistance are desirable.
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Davidson James A.
Mishra Ajit K.
Isabella David
Smith & Nephew Richards Inc.
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