摘要
目的:评价CBCT测量根管工作长度的准确性,为临床应用提供实验依据。方法:选取外形完整、根尖发育完成或接近完成、无龋坏、无充填及牙髓病治疗史的上下颌磨牙40颗(共计136个根管)。应用CBCT测量各磨牙根管工作长度,以直视下测量的根管工作长度为标准,判断测量方法的准确性,并且和RVG、根管长度电测仪测量结果比较。结果:CBCT(根管腔测量法;根长度测量法)的准确率分别是84.56%、91.91%,而RVG、根管长度电测仪的准确率分别是58.09%、86.03%。经统计学检验,CBCT测量的准确率与根管长度电测仪差异无统计学意义(P>0.05),RVG测量与其他两种方法的准确率差异有统计学意义(P<0.01)。结论:CBCT与根管长度电测仪测量磨牙根管工作长度的准确率均较高,但各有其优缺点,CBCT可作为临床根管测量方法的一种有效的补充,而在RVG图像上测量根管长度的准确率不高。
Objective： Evaluate the accuracy of measuring root canal working length by CBCT in order to provide the proof for the clinical work. Methods： Collected 40 mandibular and maxillary molars （a total of 136 root canals） between November 2011 to January 2012, which extracted at our hospital because of the requirement of the treatment, with the complete contour, the mature apical stomata, non-caries, non-filling and non-endodontic treatment history. The length of the extracted teeth root canal measured under direct vision was granted as the criterion to compare the measuring accuracy of the CBCT, the RVG and the electronic apex locator （EAL）. Provide a reference for selecting quantitative methods of measuring the root canal working length in clinical. Results： CBCT （root lumen measurement; root length measurement accuracy of the method） are 84.56%, 91.91%, RVG, the electronic apex locator （EAL） accuracy rate is 58.09%, 86.03%. The statistical test the CBCT and the EAL accuracy difference was not statistically significant （P 〉 0.05）, RVG measurement accuracy rate differences with the other two methods was statistically significant （P 〈 0.01）. Conclusion： The results of the EAL and CBCT is the most accurate, the RVG result is the worst. The CBCT can be considered as an effective complement to the commonly clinical methods.
出处
《CT理论与应用研究（中英文）》
2013年第1期173-179,共7页
Computerized Tomography Theory and Applications
作者简介
张以鸣（1981-），男，同济大学附属第十人民医院住院医师，日本松本齿科大学在读博士，主要从事口腔临床工作和研究，Tel：021-66301727，E-mail：zym811113@hotmail．com唐小山（1970-），男，同济大学附属第十人民医院口腔科副主任医师，主要从事口腔正畸临床与研究，Tel：021—66301731，E-mail：tangrong200l@hotmail．com。
