根管治疗时扩大针、根管锉等断折在根管内,由于破折物的种类、破折的部位不同,给操作带来极大的困难。如将破折物不取出放在根管内代替根管充填,经过一个时期在X线片上,根尖部显有暗影者较多,临床遇到3例,该文章介绍他们的经验体会。取根管内破折物大体有3种方法:即器 Root canal treatment to expand the needle, root canal file fracture in the root canal, due to the type of broken objects, breaking the different parts of the operation to bring great difficulties. If the dilapidated object is not removed and placed in the root canal instead of filling the root canal, after a period of time on the X-ray film, there are more dark spots in the root tip, and clinical encounter in 3 cases. The article introduces their experiences and experiences. Take the root canal rupture in general there are 3 ways: the device