School of Dentistry, The University of Manchester, Manchester M14 5FH, UK.
Int Endod J. 2010 Apr;43(4):301-5. doi: 10.1111/j.1365-2591.2009.01680.x.
To investigate the experience of UK endodontists with aspects of ultrasonic use for removal of intra-canal fractured instruments.
A questionnaire form comprising both close-ended and partially close-ended questions with a covering letter explaining the aims of the study and indicating that all information would remain confidential and anonymous were sent to 180 endodontists working in the UK. Non respondents received a reminder with a differently worded covering letter. After collecting the responses, data were entered into SPSS software through which frequencies were determined and the chi-square test at the 0.05 level of significance, when required, was applied.
Overall, 97% of endodontists reported the use of ultrasonics for removal of fractured instruments. The majority of them (78%) used ultrasonics with a coolant at least some of the time. Forty-seven per cent of users activated tips at medium to maximum power settings. The greatest proportion (53%) activated the tips for approximately 10 s.
Endodontists reported different techniques when using ultrasonics for removal of fractured instruments.
调查英国牙髓病学家在使用超声技术取出根管内折断器械方面的经验。
向在英国工作的 180 名牙髓病学家发送了一份包含封闭式和部分封闭式问题的问卷表，并附有一封说明研究目的的信，信中指出所有信息将保密和匿名。未回复的人会收到一封措辞不同的提醒信。收集完回复后，通过 SPSS 软件将数据输入，确定频率，并在需要时应用 0.05 水平的卡方检验。
总体而言，97%的牙髓病学家报告说使用超声技术取出折断器械。他们中的大多数（78%）至少在某些时候使用带冷却剂的超声技术。47%的使用者将尖端调至中等到最大功率设置。最大比例（53%）将尖端激活约 10 秒。
牙髓病学家在使用超声技术取出折断器械时报告了不同的技术。
