Asheghi Bahar, Momtahan Nariman, Sahebi Safoora, Zangoie Booshehri Maryam
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Dent (Shiraz). 2020 Sep;21(3):215-224. doi: 10.30476/DENTJODS.2020.82299.1011.
A thorough knowledge of the morphological and anatomical variations of root canal system can help identify all root canals, adequate instrumentation, and consequently leads to a successful endodontic treatment. The knowledge of root morphology can influence the outcome of root canal therapy.
The aim of this study was to investigate the morphology of maxillary premolar canals in Iranian population by analyzing cone-beam computed tomography (CBCT) scans.
This cross-sectional retrospective study consisted of CBCT of 280 patients over 16 years of age. The position, number of roots, and root morphology of maxillary premolars were inspected. The root canal configurations of maxillary premolar teeth were also analyzed according to the Vertucci classification. The statistical analyses wee performed using chi-square test. Significance level was set at < 0.05.
In the present study, of 462 maxillary first premolars, 8 (1.73%) teeth had three roots, 222 (48.05%) teeth had two roots, and 232 (50.22%) were single-rooted. In the second maxillary premolar group, of 400 premolars, 2 (0.5%) teeth had three roots, 34 (8.5%) teeth were two-rooted, and 364 (91%) were single-rooted. The most root canal configurations were type IV (71.64%) and type I (63%) in maxillary first and second premolars, respectively. Among females, single rooted premolars were the most prevalent (56.83%), and among males, two-rooted premolars were the most prevalent (57.61%).
This study provided information about the root canals of maxillary premolar teeth for Iranian subpopulation leading to more optimal diagnosis and treatment planning for the endodontists. According to the findings, the complexity of root canal system and the number of roots were less common in females compared to males.
全面了解根管系统的形态和解剖变异有助于识别所有根管、进行充分的根管预备，并最终实现成功的牙髓治疗。根管形态的知识会影响根管治疗的结果。
本研究的目的是通过分析锥形束计算机断层扫描（CBCT）图像来研究伊朗人群上颌前磨牙根管的形态。
这项横断面回顾性研究包括280名16岁以上患者的CBCT图像。对上颌前磨牙的位置、牙根数量和牙根形态进行检查。还根据Vertucci分类法分析上颌前磨牙的根管形态。采用卡方检验进行统计学分析。显著性水平设定为<0.05。
在本研究中，462颗上颌第一前磨牙中，8颗（1.73%）有三根，222颗（48.05%）有两根，232颗（50.22%）为单根。在上颌第二前磨牙组中，400颗前磨牙中，2颗（0.5%）有三根，34颗（8.5%）有两根，364颗（91%）为单根。上颌第一和第二前磨牙中最常见的根管形态分别为IV型（71.64%）和I型（63%）。在女性中，单根前磨牙最为常见（56.83%），在男性中，两根前磨牙最为常见（57.61%）。
本研究为伊朗亚人群提供了上颌前磨牙根管的相关信息，有助于牙髓病医生进行更优化的诊断和治疗计划。根据研究结果，与男性相比，女性根管系统的复杂性和牙根数量较少见。
