Abstract
We have developed a femoral component made of Ti-15Mo-5Zr-3Al alloy for total hip prostheses. In vitro mechanical experiments showed that this alloy had better mechanical properties than Ti-6Al-4V alloy with respect to yield strength, tensile strength, elongation, and reduction of area. The elastic modulus of the Ti-15Mo-5Zr-3Al alloy was lower than and its fatigue properties were superior to those of the Ti-6Al-4V alloy. Intraosseous implantation experiments in vivo revealed favorable bone formation around the implants made of Ti-15Mo-5Zr-3Al in rat tibia and no inflammatory responses to the implant. Ti-15Mo-5Zr-3Al alloy appears to be a suitable material for the femoral components of total hip prostheses.
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