Mirza Mubashir Baig
Conservative Dental Science Department, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Riyadh, Saudi Arabia.
J Dent Sci. 2022 Oct;17(4):1626-1633. doi: 10.1016/j.jds.2022.03.012. Epub 2022 Apr 9.
BACKGROUND/PURPOSE: Failure to identify and treat the root canal system in its entirety has been known to be one of the leading causes of unsuccessful root canal treatment (RCT). This study aims to retrospectively assess the permanent canines in a Saudi Arabian sub population for the number of roots, root canal morphologies and the presence of symmetry among them using cone-beam computed tomography (CBCT).
CBCT scans belonging to 945 patients were screened. A total of 1880 permanent canines, 928 pertaining to maxilla and 952 pertaining to mandible were analyzed for the number of roots, root canal morphologies and the presence of symmetry among them. Comparative evaluation between genders was done using Fisher's exact test, since majority of the groups had expected count of less than 5. A calculated -value of less than 0.05 was considered significant. Chi square test was used for statistical analysis of the data. Intra operator variability was observed using Cohen's Kappa test.
Single root was observed in 100% and 98.7% of the maxillary and mandibular canines respectively. Two roots were identified in 1.3% of the MnC's. Type I (97.48%), Type II (0.21%), Type III (1.05%) and Type V (1.26%) Vertucci canal configurations (VC) were observed in MnC's. Statistical significant difference was observed concerning the number of roots and canal morphology according to Vertucci in the mandibular canines. No difference was observed according to Ahmed et al. classification system. Moreover, there was no gender based difference seen among them.
More variable root and canal morphologies are observed in MnC's, although single root with Type I VC is the most common.
背景/目的：未能完整识别和处理根管系统一直被认为是根管治疗（RCT）失败的主要原因之一。本研究旨在使用锥形束计算机断层扫描（CBCT）对沙特阿拉伯亚人群中的恒尖牙进行回顾性评估，以确定牙根数量、根管形态以及它们之间的对称性。
筛选了945例患者的CBCT扫描图像。对总共1880颗恒尖牙进行分析，其中上颌928颗，下颌952颗，以确定牙根数量、根管形态以及它们之间的对称性。由于大多数组的预期计数小于5，因此使用Fisher精确检验对性别进行比较评估。计算值小于0.05被认为具有统计学意义。使用卡方检验对数据进行统计分析。使用Cohen's Kappa检验观察操作者内部的变异性。
在上颌尖牙和下颌尖牙中，分别有100%和98.7%观察到单根。在下颌尖牙中，有1.3%发现两根。在下颌尖牙中观察到I型（97.48%）、II型（0.21%）、III型（1.05%）和V型（1.26%）Vertucci根管形态（VC）。根据Vertucci分类法，在下颌尖牙的牙根数量和根管形态方面观察到统计学上的显著差异。根据Ahmed等人的分类系统未观察到差异。此外，在它们之间未发现基于性别的差异。
在下颌尖牙中观察到更多可变的牙根和根管形态，尽管单根伴I型VC是最常见的。
