摘要乳牙外伤可能引发恒牙发育异常，由于外伤发生时间较早，创伤性事件常被遗忘，如未及时诊断和干预治疗，可引起美观和功能障碍。本文对乳牙外伤导致恒牙发育和萌出异常的类型，乳牙外伤引发恒牙发育异常的病因、相关因素，以及治疗方案进行系统阐述，以期为乳牙外伤导致恒牙发育异常的诊断、治疗及并发症的预防提供参考。

abstractsThe trauma to primary tooth may lead to developmental disturbances of permanent tooth. Because the traumatic events are often forgotten as accurred earlier, the timely diagnosis and intervention treatment are not conducted, resulting in aesthetic and functional disorders. This paper systematically elaborates the types of developmental disturbances in permanent tooth after traumatic injuries to the primary predecessor, and the etiology, mechanism, related factors as well as the treatment options, in order to provide references for the prevention of serious complications in inherited permanent tooth caused by primary tooth trauma.