Wu Di, Hu Dan-Qing, Xin Bing-Chang, Sun De-Gang, Ge Zhi-Pu, Su Jing-Yuan
Department of Cariology and Endodontology, Department of Oral Radiology, Qingdao Stomatological Hospital.
Department of Epidemiology and Health Statistics, School of Public Health, Qingdao University, Qingdao, Shandong, China.
Medicine (Baltimore). 2020 May;99(20):e20116. doi: 10.1097/MD.0000000000020116.
The aim of this study was to explore the root morphology and root canal configuration of first premolars among Shandong Chinese residents using cone-beam computed tomography (CBCT).Randomly selected CBCT images were collected from 648 patients (44% women, 56% men). In total, 1268 maxillary and 1296 mandibular first premolars were analyzed. The number of roots and the canal configuration were recorded and identified based on Vertucci's classification.The majority of the maxillary first premolars had 1 root (67.4%), followed by 2 roots (32%). A 2-canal configuration (89%) was the most prevalent observation. For mandibular first premolars, 98.8% had 1 root and 81% presented the type I configuration. There were no statistical differences in the number of roots or morphology in terms of the left/right side or sex (P > .05).Among Chinese residents, the majority of maxillary first premolars had 1 root and 2 canals, whereas the most common anatomical configuration for mandibular first premolars was 1 root with 1 canal.
本研究旨在使用锥形束计算机断层扫描（CBCT）探索山东汉族居民中第一前磨牙的牙根形态和根管结构。从648例患者（44%为女性，56%为男性）中随机选取CBCT图像。总共分析了1268颗上颌第一前磨牙和1296颗下颌第一前磨牙。根据Vertucci分类记录并识别牙根数量和根管结构。大多数上颌第一前磨牙有1个牙根（67.4%），其次是2个牙根（32%）。观察到最常见的是双根管结构（89%）。对于下颌第一前磨牙，98.8%有1个牙根，81%呈现I型结构。在牙根数量或形态方面，左右侧或性别之间无统计学差异（P>0.05）。在汉族居民中，大多数上颌第一前磨牙有1个牙根和2条根管，而下颌第一前磨牙最常见的解剖结构是1个牙根和1条根管。
