题目内容
下列关于活髓切断术的叙述,不必要的一项是
2021-12-20
A.去净腐质,消毒窝洞
B.局部麻醉,橡皮障隔湿
C.术前口服抗生素
D.去净髄室顶,切除冠髓
E.止血、放盖髄剂、氧化锌丁香油暂封窝洞
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