Torres Hianne Miranda de, Arruda Julyanna Jacinto de, Silva-Filho João Manoel da, Faria Danielle Lago Bruno de, Nascimento Monikelly Carmo Chagas, Torres Érica Miranda de
Gen Dent. 2017 May-Jun;65(3):37-41.
The anatomical characteristics of permanent maxillary canines were evaluated through visual examination, periapical radiography, and cone beam computed tomography (CBCT), and measurements obtained from the images and directly on the teeth were compared. Fifty extracted human maxillary canines were classified according to the side of the mouth. The direction of root curvature and location of the apical foramen were also verified. Periapical radiographs and CBCTs of the specimens were obtained. The number of root canals was verified. Tooth length and the mesiodistal and buccopalatal widths of the root were measured directly on the specimens as well as on the radiographs and CBCTs. Data were analyzed by chi-square testing and analysis of variance (α = 0.05). All teeth-26 (52%) from the right side of the dental arch and 24 (48%) from the left-had only 1 main canal each. The apical foramen was located exactly in the root apex in 34 teeth (68%). Root curvature toward the distal side was observed in the apical third in 23 teeth (46%). There were no statistically significant differences between the canines' arch side and either the foramen location (P = 0.104) or the root curvature (P = 0.215). No statistically significant differences were found in measurements of tooth length (P = 0.669), mesiodistal root width (P = 0.517), or buccopalatal root width (P = 0.672) obtained from specimens and images. Both CBCTs and periapical radiographs were reliable for determining the tooth length, mesiodistal root width, and buccopalatal root width of maxillary canines and produced statistically similar measurements.
通过视觉检查、根尖片和锥形束计算机断层扫描（CBCT）对恒牙上颌尖牙的解剖特征进行评估，并比较从图像和直接在牙齿上获得的测量值。50颗拔除的人类上颌尖牙根据口腔侧别进行分类。还对牙根弯曲方向和根尖孔位置进行了验证。获取了标本的根尖片和CBCT图像。对根管数量进行了验证。直接在标本以及X线片和CBCT图像上测量牙齿长度、牙根的近远中宽度和颊舌宽度。采用卡方检验和方差分析对数据进行分析（α = 0.05）。所有牙齿——牙弓右侧的26颗（52%）和左侧的24颗（48%）均各只有1条主根管。34颗牙齿（68%）的根尖孔恰好位于根尖处。23颗牙齿（46%）在根尖三分之一处观察到牙根向远中侧弯曲。尖牙的牙弓侧与根尖孔位置（P = 0.104）或牙根弯曲（P = 0.215）之间均无统计学显著差异。在从标本和图像获得的牙齿长度（P = 0.669）、牙根近远中宽度（P = 0.517）或颊舌宽度（P = 0.672）测量值方面未发现统计学显著差异。CBCT和根尖片在确定上颌尖牙的牙齿长度、牙根近远中宽度和颊舌宽度方面均可靠，且产生的测量值在统计学上相似。
