Dağsuyu İlhan Metin, Kahraman Fatih, Okşayan Rıdvan
Department of Orthodontics, Faculty of Dentistry, Eskişehir Osmangazi University, Eskişehir, 26000, Turkey.
Oral Radiol. 2018 Jan;34(1):66-72. doi: 10.1007/s11282-017-0289-5. Epub 2017 May 2.
The aim of this study was to evaluate the localization, angulation, and resorption features of maxillary impacted canines on cone-beam computed tomography (CBCT).
This retrospective study examined the CBCT scans of 140 maxillary impacted canines in 102 patients (43 males, 59 females; mean age: 16.25 ± 6.31 years). The following impacted canine-related parameters were analyzed on the CBCT images: impaction side; location; root resorption levels of adjacent teeth; occlusal plane and midline distances of impacted canines; and angulations of impacted canines to midline, lateral incisor, and occlusal plane.
Bilateral canine impaction was found in 38 subjects, and unilateral canine impaction was present in 64 subjects. Severe resorption was found in 14 canines. There were no significant differences between the occlusal plane and midline distances to the impacted canine cusp tip and root apex (p > 0.05). The midline angulation of right maxillary impacted canines was significantly higher than that of left maxillary impacted canines (p < 0.05), while the occlusal plane angulation of left maxillary impacted canines was significantly higher than that of right maxillary impacted canines (p < 0.05).
Maxillary canine impaction was more frequently seen in female subjects than in male subjects. Lateral incisors were more frequently affected than first premolars, and slight resorption was more frequently seen in adjacent teeth. CBCT assessment of maxillary impacted canines can provide accurate measurements of angular, linear, and resorption parameters.
本研究旨在评估锥形束计算机断层扫描（CBCT）上上颌埋伏尖牙的位置、角度和吸收特征。
本回顾性研究检查了102例患者（43例男性，59例女性；平均年龄：16.25±6.31岁）的140颗上颌埋伏尖牙的CBCT扫描图像。在CBCT图像上分析以下与埋伏尖牙相关的参数：埋伏侧；位置；相邻牙齿的牙根吸收程度；埋伏尖牙的咬合平面和中线距离；以及埋伏尖牙相对于中线、侧切牙和咬合平面的角度。
38例患者为双侧尖牙埋伏，64例患者为单侧尖牙埋伏。14颗尖牙发现严重吸收。埋伏尖牙牙尖顶和牙根尖到咬合平面和中线的距离无显著差异（p>0.05）。右上颌埋伏尖牙的中线角度显著高于左上颌埋伏尖牙（p<0.05），而左上颌埋伏尖牙的咬合平面角度显著高于右上颌埋伏尖牙（p<0.05）。
上颌尖牙埋伏在女性患者中比男性患者更常见。侧切牙比第一前磨牙更常受累，相邻牙齿轻微吸收更常见。CBCT对上颌埋伏尖牙的评估可以提供角度、线性和吸收参数的准确测量。
