题目内容
第一前磨牙缺失时，人工牙牙冠长度应
2021-11-10
A.与侧切牙切缘平齐
B.低于尖牙牙冠长度1 mm
C.高于尖牙牙冠长度1 mm
D.低于尖牙牙冠长度1.5 nun
E.与尖牙牙冠长度协调一致，以利于美观
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