方法用FR根充糊剂对慢性牙髓炎和（或）慢性根尖炎的患牙进行一次性根管治疗。
Method Root canals of chronic pulpitis and (or) apicitis were filled using the FR paste.
目的：探讨慢性根尖周炎的x线诊断与临床病理诊断之间的关系。
OBJECTIVE: To study the comparison of X-ray diagnosis and clinic pathology diagnosis of chronic periapical periodontitis.
目的：比较奥硝唑碘仿糊剂和碘仿糊剂治疗乳牙慢性根尖周炎疗效的差异。
Objective: To compare the difference of effects between the ornidazole-iodoform past and the iodoform past on treatment of deciduous teeth chronic periapical periodontitis.
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