Hülsmann M
Department of Operative Dentistry, University of Göttingen, Germany.
J Endod. 1994 Mar;20(3):144-7. doi: 10.1016/S0099-2399(06)80062-2.
Removal of fractured instruments is one of the most difficult operative procedures in endodontics. Although a number of different devices and techniques have been developed, none are successful in all cases. An additional technique using an automated device (Canal Finder System) for bypassing and an ultrasonic device for loosening and retrieval of fractured instruments is presented. The rationale for this technique is described and illustrated by two clinical cases.
取出折断器械是牙髓病学中最困难的手术操作之一。尽管已经开发了许多不同的器械和技术，但没有一种在所有情况下都能成功。本文介绍了一种使用自动装置（根管探查系统）进行旁路、超声装置进行折断器械松动和取出的附加技术。通过两个临床病例描述并说明了该技术的基本原理。
