三种根管消毒剂对年轻恒牙根尖周炎疗效的对比研究
삼충근관소독제대년경항아근첨주염료효적대비연구
The Comparative Study on Clinical Effects of Three Kinds of D isinfectant in Root Canal Applied to Young Ermanent Teeth with Periapical Perio dontitis
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