Objective: To compare the clinic outcomes of ceramic crowns made of titanium alloy and NiCr alloy.

目的：比较钛合金和镍铬合金烤瓷冠的临床效果。

The effects of metal base content and NiCr alloy addition on hardness, friction coefficient and wear rate of the composites were studied.

研究了金属基体及其中镍铬合金的含量对复合材料的硬度、摩擦系数和磨损率的影响。