Soleymani Ali, Namaryan Nafiseh, Moudi Ehsan, Gholinia Ali
Department of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Iran Endod J. 2017 Winter;12(1):78-82. doi: 10.22037/iej.2017.16.
The present study was conducted to assess the morphology of mandibular canines using cone-beam computed tomography (CBCT) in a north Iranian population.
For the morphological assessment of mandibular canines, 150 CBCT images taken from patients for different reasons were used. The mandibular canines were examined in sagittal, coronal and axial dimensions. The canal pattern, number of roots/canals, the tooth length, the orientation of the roots and the position of the apical foramina were evaluated and the effect of gender on each variable was assessed. The obtained data were analyzed using the Chi-square and student's t-tests.
According to the Vertucci's criteria, the most common pattern was type I morphology (89.7%), followed by types III (5.7%), II (3.7%) and V (1%). No significant differences were observed between the male and female patients in terms of canal type (>0.05). Gender difference is a factor which affected the root length and the number of mandibular canine root and root canal. There were 296 single-root and four double-root canines. The double-root canines and mandibular canine with two canals were significantly more common among men than women (=0.00). The apical foramen was laterally positioned in 68.3% and centrally in 31.7% of the cases, and the root curvatures were mostly oriented toward the buccal region. No significant statistical difference was observed for mentioned parameters in right and left half of the jaw.
Due the diverse morphology and the potential presence of a second mandibular canine among Iranians, dentists should perform endodontic treatments with greater care. CBCT is an accurate tool for the morphological assessment of root canals.
本研究旨在利用锥形束计算机断层扫描（CBCT）评估伊朗北部人群下颌尖牙的形态。
为评估下颌尖牙的形态，使用了因不同原因从患者处获取的150张CBCT图像。在下颌尖牙的矢状、冠状和轴状维度上进行检查。评估根管形态、牙根/根管数量、牙长、牙根方向和根尖孔位置，并评估性别对每个变量的影响。使用卡方检验和学生t检验对获得的数据进行分析。
根据韦尔图奇标准，最常见的形态是I型（89.7%），其次是III型（5.7%）、II型（3.7%）和V型（1%）。在根管类型方面，男性和女性患者之间未观察到显著差异（>0.05）。性别差异是影响下颌尖牙牙根长度以及牙根和根管数量的一个因素。有296颗单根尖牙和4颗双根尖牙。双根尖牙和有两个根管的下颌尖牙在男性中比女性中更常见（=0.00）。68.3%的病例中根尖孔位于外侧,31.7%位于中央，牙根弯曲大多朝向颊侧区域。在颌骨的左右两半中，上述参数未观察到显著的统计学差异。
由于伊朗人下颌尖牙形态多样且可能存在第二根管，牙医应更加谨慎地进行牙髓治疗。CBCT是根管形态评估的准确工具。
