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Abstract
Titanium has been increasingly applied to dental prostheses because of its biocompatibility.
However, application remains limited, due to the low strength and poor wear resistance
of unalloyed titanium. The purpose of this study is to evaluate the wear resistance
of high-strength Ti-6Al-7Nb alloy castings for dental application. Test specimens
were cast from commercially pure titanium (CP-Ti grades 2 and 3) and Ti-6Al-7Nb alloy
ingots, and subjected to a wear test simulating the occlusal loading pattern. Wear
resistance was evaluated by the weight loss during the test. Ti-6Al-7Nb alloy was
found to exhibit lower weight loss than CP-Ti. Moreover, scanning electron microscopic
(SEM) observation after the test revealed that the worn surface of Ti-6Al-7Nb alloy
is much smoother than that of CP-Ti. These results indicate that Ti-6Al-7Nb alloy
castings can be used to produce dental prostheses of improved wear resistance and
mechanical strength.