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当前学科:圆锥型套筒冠义齿
题目:
单选
套筒冠义齿修复前要做的准备工作,不必要的是()
A . A.牙周治疗
B . B.X线牙片
C . C.根管治疗
D . D.与患者讲明治疗方案
E . E.拔除所有残冠
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