Comparison of the effect of calcium hydroxide and formocresol on treatment of chronic periapical periodontitis;
目的观察比较氢氧化钙、抗生素制剂和甲醛甲酚在根管内封药的消毒效果。
Objective To evaluate and compare the efficacy of calciun hydroxide or formocresol as an intracanal medicament in root canal therapy of periapical periodontitis teeth.
目的：探讨慢性根尖周炎患者进行一次性根管治疗术的急性发作原因和预防措施。
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