Sajed Maryam, Alvandifar Shiva, Mallahi Maisa
Student Research Committee, Dental Faculty, Golestan University of Medical Science, Gorgan, Iran.
Departments of Endodontics, Dental Faculty, Golestan University of Medical Science, Gorgan, Iran.
Iran Endod J. 2024;19(3):183-188. doi: 10.22037/iej.v19i3.40052.
Successful endodontic treatment depends on completely clearing, shaping, and filling the prepared canals. Knowledge of the common and aberrant varying pulp anatomies is essential for suitable root canal treatment. Since, this anatomy is complex and varies morphologically in different populations. This study aims to determine the number of roots, canals, and evaluation of mandibular premolars canals using cone-beam computed tomography (CBCT) images in one of Iran's northern provinces (Golestan).
CBCT axial, coronal, and sagittal slices of two hundred and twelve mandibular premolars were analyzed to determine the number of roots and canals based on Vertucci type. The images were analyzed in a one-millimeter slice in mesiodistal and buccolingual dimensions based on gender. The data were analyzed using the Chi-score test to compare the components if the defaults were not established. A significance level of 0.05 was considered.
Of the two hundred twelve teeth evaluated, 130 (61.3%) were first premolars, and 82 (38.6%) were second premolars. Most first premolars (78.5%) and almost all second premolars (97.6%) had one root. Morphological types of root canals were identified based on Vertucci's classification types I, II, III, IV, V, or VIII, and type I was the most frequent. There were no significant associations between number of roots and sex (>0.05).
Mandibular premolars mostly had one root and type I Vertucci morphology. The frequency of two-canal premolars was higher in the male population. Although the abundance of two or three roots with different morphologies was also observed, the possibility of the presence of an additional root canal should be considered.
成功的牙髓治疗取决于完全清理、塑形和充填预备好的根管。了解常见和异常的不同牙髓解剖结构对于合适的根管治疗至关重要。由于这种解剖结构复杂且在不同人群中形态各异。本研究旨在使用锥形束计算机断层扫描（CBCT）图像确定伊朗北部一个省份（戈勒斯坦）下颌前磨牙的根管数量，并对其根管进行评估。
分析212颗下颌前磨牙的CBCT轴位、冠状位和矢状位切片，根据韦尔图奇分型确定根管数量。基于性别，在近远中向和颊舌向以1毫米的切片厚度分析图像。如果未建立默认值，则使用卡方检验分析数据以比较各组成部分。显著性水平设定为0.05。
在评估的212颗牙齿中，130颗（61.3%）为第一前磨牙，82颗（38.6%）为第二前磨牙。大多数第一前磨牙（78.5%）和几乎所有第二前磨牙（97.6%）有一个牙根。根据韦尔图奇分类法确定根管的形态类型为I、II、III、IV、V或VIII型，其中I型最为常见。牙根数量与性别之间无显著关联（>0.05）。
下颌前磨牙大多有一个牙根且为I型韦尔图奇形态。男性人群中双根管前磨牙的发生率较高。尽管也观察到有不同形态的两个或三个牙根的情况，但应考虑存在额外根管的可能性。
