Ward Jeff R
School of Dental Science, The University of Melbourne.
Aust Endod J. 2003 Apr;29(1):25-30. doi: 10.1111/j.1747-4477.2003.tb00492.x.
The frequency of use of nickel-titanium rotary instruments in endodontic practice is increasing. One occasionally mentioned problem is fracture of an instrument within the root canal. The broken instrument may prevent access to the root apex, impeding optimal cleaning and shaping procedures. A case report is presented which uses a modern technique, utilising a staging platform and the use of newly designed ultrasonic tips with direct visualisation through a dental operating microscope, to remove a fractured rotary nickel-titanium instrument from the apical third of a curved root canal.
镍钛旋转器械在牙髓病治疗中的使用频率正在增加。一个偶尔被提及的问题是根管内器械折断。折断的器械可能会妨碍进入根尖，从而阻碍最佳的清理和成形操作。本文报告了一个病例，采用一种现代技术，利用一个分级平台以及使用新设计的超声尖，通过牙科手术显微镜直接可视化，从弯曲根管的根尖三分之一处取出折断的旋转镍钛器械。
