Paterson Andrew, Franco Vittorio, Patel Shanon, Foschi Federico
Department of Endodontics, The Faculty of Dentistry, Oral and Craniofacial Sciences at Kings' College London, London, United Kingdom.
UK Dental Specialists, UKDS, St. Alban, United Kingdom.
Imaging Sci Dent. 2020 Sep;50(3):183-192. doi: 10.5624/isd.2020.50.3.183. Epub 2020 Sep 16.
This study was performed to assess the accuracy of preoperative cone-beam computed tomography (CBCT), when justified for other reasons, in locating the apical foramen and establishing the working length.
Six electronic databases were searched for studies on this subject. All studies, of any type, were included if they compared measurements of working length with preoperative CBCT to measurements using an electronic apex locator (EAL) or histological reference standard. Due to the high levels of heterogeneity, an inverse-variance random-effects model was chosen, and weighted mean differences were obtained with 95% confidence intervals and values.
Nine studies were included. Compared to a histological reference standard, CBCT indicated that the apical foramen was on average 0.40 mm coronal of its histological position, with a mean absolute difference of 0.48 mm. Comparisons were also performed to an EAL reference standard, but the conclusions could not be considered robust due to high levels of heterogeneity in the results.
A low level of evidence is produced suggesting that preoperative CBCT shows the apical foramen to be on average 0.40 mm coronal to its histological position, with a mean absolute difference of 0.48 mm.
本研究旨在评估在因其他原因而合理使用时，术前锥形束计算机断层扫描（CBCT）在定位根尖孔和确定工作长度方面的准确性。
检索了六个电子数据库中关于该主题的研究。如果将术前CBCT测量的工作长度与使用电子根尖定位仪（EAL）或组织学参考标准测量的结果进行比较，则纳入所有类型的研究。由于异质性水平较高，选择了逆方差随机效应模型，并获得了加权平均差以及95%置信区间和P值。
纳入了九项研究。与组织学参考标准相比，CBCT显示根尖孔平均位于其组织学位置冠方0.40mm处，平均绝对差为0.48mm。还与EAL参考标准进行了比较，但由于结果中的异质性水平较高，这些结论不能被认为是可靠的。
有低水平证据表明，术前CBCT显示根尖孔平均位于其组织学位置冠方0.40mm处，平均绝对差为0.48mm。
