题目内容
有关活髓切断术的叙述中,不必要的是
2022-03-09
A.术前口服抗生素
B.局部麻醉,橡皮障隔湿
C.去净髓室顶,切除冠髓
D.去净腐质,消毒窝洞
E.止血、放盖髓剂、氧化锌丁香油暂封窝洞
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