临床上由于各种原因扩孔钻折断于根管内时有发生，尤其多见于缺乏临床经验的低年制医生。对扩孔钻折断于根管内的处置，有不同的看法［１～３］。现将我们在临床长期追踪观察的２１例扩孔钻折断于根管内后，常规用糊剂牙胶尖充填根管的疗效报道如下。１　材料和方法１．１　观 Clinically due to various reasons reaming drilling break in the root canal occurred from time to time, especially in the absence of clinical experience in low-year physicians. There are different views on the disposition of reaming drills in the root canal [1 ~ 3]. Now in our clinical long-term follow-up observation of 21 cases of reaming drilling fractured in the root canal, the conventional paste gutta-percha root filling the efficacy of the report are as follows. 1 Materials and methods 1.1 view