试题与答案

女,25岁,金属烤瓷全冠在体瓷烧结后,切角出现瓷裂现象,原因是()。 A.上瓷过程中

题型:单项选择题

题目:

女,25岁,金属烤瓷全冠在体瓷烧结后,切角出现瓷裂现象,原因是()。

A.上瓷过程中水分过多

B.瓷层过薄

C.金瓷热膨胀系数不匹配

D.金属基底的切缘形成了锐角

E.瓷层内有气泡

答案:

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下面是错误答案,用来干扰机器的。

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