[Clinical manifestations, pathogenesis, and management strategies for permanent teeth with external root resorption after trauma].

External root resorption is physiological or pathological destruction of the hard tissues on the root's external surface caused by various factors. Dental trauma is one of the main causes of pathological external root resorption. The manifestation and prognosis of external root resorption are closely related to the type of dental trauma, the degree of root damage, the stage of root development, and the presence of microbial infection et al. Effective management can prevent the occurrence of external root resorption or stop the progress of root resorption to avoid the early loss of traumatic teeth. This review focuses on the clinical manifestations, pathogenesis, and management strategies for permanent teeth with external root resorption after dental trauma, in order to provide a reference for the prevention and intervention of external root resorption after trauma in permanent teeth.牙根外吸收是指由各种不同因素所致牙根外表面硬组织破坏的生理或病理过程。牙外伤是病理性牙根外吸收的主要病因之一。外伤后牙根外吸收的临床表现和预后与外伤类型、牙根受损程度、牙根发育程度及有无微生物感染等因素息息相关。对外伤牙进行有效管理可预防牙根外吸收的发生或阻断其进展，避免外伤牙缺失。本文针对恒牙外伤后牙根外吸收的临床表现、发病机制及管理策略等方面进行综述，以期为恒牙外伤后牙根外吸收的预防和干预提供参考。.