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【单选题】
关于牙半切术的手术方法叙述不正确的是A.
伤口完全愈合后，进行牙体或牙列的修复
B.
将患牙从牙冠向根分叉部位分为近远中两部分，以多保留侧牙体为好
C.
术前进行根管治疗，髓室内以银汞合金充填
D.
拔除患侧，无需骨修整
E.
切口、翻瓣同截根术，如根分叉已完全暴露，也可不做翻瓣
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