Priyank Harsh, Viswanath Butta, Sriwastwa Ankur, Hegde Prashant, Abdul Nishath Sayed, Golgeri Mahesh Suganna, C Shivakumar G, Mathur Hemant
Department of Conservative, Endodontics & Aesthetic Dentistry, Dental College, Rajendra Institute of Medical Sciences, Ranchi, IND.
Endodontics, Dental Care Centre, Ranchi, IND.
Cureus. 2023 Jan 23;15(1):e34114. doi: 10.7759/cureus.34114. eCollection 2023 Jan.
Introduction Morphological changes or variations in the lower third molar can be of concern during the endodontic, orthodontic, or prosthetic intervention. The goal of the present study was to evaluate the morphological alterations in the roots and root canal of a mandibular third molar in Bhopal, Central India, on cone beam computed tomography (CBCT) images. Methodology CBCT scans of 277 mandibular molars, of both genders, between the ages of 18 and 60 years were assessed for the presence of root numbers, the configuration of the canal based on Vertucci's categorization, and a C-shaped canal. Scan results were analyzed for differences in canal configuration between the roots and topographical distribution. A chi-square test was applied to find any significant differences between the teeth at p 0.05. Results Scans analyzed for variations in the third molar had a mean age of 38.64 + 5.71 years. The majority (95.3%) of the molars had two roots, 1.5% had three roots, and 0.4% had five roots. The mesial side of double-rooted teeth predominantly had Type II canal configuration (67.0%), while it was Type I (79.2%) in the distal aspect of the root. C-shaped canals were detected in 21 teeth, and no significant topographical difference was noted in the CBCT images. Conclusion The majority of the current population showed two roots with the same number of canals in the studied tooth. CBCT can be used as a diagnostic aid in identifying the canal numbers and their configuration so as to render appropriate intervention and minimize subsequent failure.
引言 在牙髓治疗、正畸治疗或修复治疗期间，下颌第三磨牙的形态变化或变异可能会引起关注。本研究的目的是在锥形束计算机断层扫描（CBCT）图像上评估印度中部博帕尔地区下颌第三磨牙牙根和根管的形态改变。方法 对277颗年龄在18至60岁之间的男女下颌磨牙进行CBCT扫描，评估牙根数量、基于韦尔图奇分类法的根管形态以及C形根管的情况。分析扫描结果以找出牙根之间根管形态的差异和地形分布。应用卡方检验以发现牙齿之间在p<0.05时的任何显著差异。结果 分析的第三磨牙变异扫描的平均年龄为38.64±5.71岁。大多数（95.3%）磨牙有两个牙根，1.5%有三个牙根，0.4%有五个牙根。双根牙的近中侧主要为II型根管形态（67.0%），而牙根远中侧为I型（79.2%）。在21颗牙齿中检测到C形根管，CBCT图像中未发现明显的地形差异。结论 在当前研究人群中，大多数研究牙齿显示有两个牙根且根管数量相同。CBCT可作为一种诊断辅助手段，用于识别根管数量及其形态，以便进行适当的干预并尽量减少后续失败。
