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繁茂性牙骨质结构不良（FCOD）是牙骨质结构不良（COD）的亚型，是非真性肿瘤性病变，通常无症状。本文就1例将 FCOD 误诊为根尖周疾病从而导致不必要的根管治疗病例进行报道分析。“,”Florid cemento -osseous dysplasia(FCOD)is a subcategory of cemento -osseous dysplasia that is nonneoplastic reactive lesion.FCOD is often asymptomatic.This case report demonstrates an unnecessary endodontic treatment of teeth with FCOD due to a misdiagnosis as periapical pathosis and briefly reviewes the relevant literature.