Cunha Rodrigo Sanches, Junaid Alanna, Ensinas Pablo, Nudera William, Bueno Carlos Eduardo da Silveira
Division of Endodontics, University of Manitoba, Winnipeg, Manitoba, Canada.
Division of Endodontics, University of Manitoba, Winnipeg, Manitoba, Canada.
J Endod. 2014 Jul;40(7):922-4. doi: 10.1016/j.joen.2014.03.016. Epub 2014 May 2.
Despite metallurgical advancements in the nickel-titanium file manufacturing process, file separation remains a concern. The purpose of this prospective clinical study was to assess the separation incidence of the reciprocating WaveOne file (Dentsply Tulsa Dental Specialties, Tulsa, OK) when used to prepare root canals of posterior teeth.
File separation incidence was assessed over an 18-month period in which 4 experienced and calibrated endodontists performed conventional endodontic treatment on posterior teeth using the WaveOne file system. The separation incidence was determined based on both the number of teeth and the number of canals instrumented during this time period.
A total of 2,215 canals (711 teeth) were treated. Three instruments (two 21.06 and one 25.08) separated during use and were deemed to be irretrievable. The overall instrument separation incidence in relation to the number of canals shaped was found to be 0.13% (0.42% teeth).
Based on the results of this study, the incidence of endodontic instrument separation when using the WaveOne reciprocating file was considerably low.
尽管镍钛锉制造工艺在冶金方面取得了进步，但锉分离问题仍然令人担忧。这项前瞻性临床研究的目的是评估使用往复式WaveOne锉（登士柏 Tulsa牙科专业公司，塔尔萨，俄克拉荷马州）预备后牙根管时的分离发生率。
在18个月的时间里评估锉分离发生率，在此期间，4名经验丰富且经过校准的牙髓病医生使用WaveOne锉系统对后牙进行常规牙髓治疗。分离发生率根据在此期间治疗的牙齿数量和预备的根管数量来确定。
总共治疗了2215个根管（711颗牙齿）。使用过程中有3根器械（两根21.06和一根25.08）分离，并且被认为无法取出。相对于预备的根管数量，总体器械分离发生率为0.13%（相对于牙齿数量为0.42%）。
基于本研究结果，使用WaveOne往复式锉时牙髓器械分离的发生率相当低。
