Qin Yifei, Shu Guang, Xu Tianmin
Second Dental Center, Peking University School and Hospital of Stomatology, Beijing, China (mainland).
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China (mainland).
Med Sci Monit. 2020 Sep 24;26:e925384. doi: 10.12659/MSM.925384.
BACKGROUND The proximity between the maxillary sinus and dental roots may impede orthodontic tooth movement. This study aimed to explore the relationship between the maxillary sinus wall (MSW) and maxillary canines and posterior teeth using cone-beam computed tomography (CBCT). MATERIAL AND METHODS CBCT images (317) were examined for whether the mesial, distal, buccal, and palatal surfaces of the examined root contacted the MSW, and the contact distance of each root surface with the MSW was measured. The effects of age and sex were analyzed using logistic regression and linear regression analyses. RESULTS The highest contact ratios with the MSW (ranging from 62.0% to 73.2%) were observed at the palatal root surfaces of the first molar mesiobuccal and distobuccal roots (1M MB and DB), the buccal root surface of the first molar palatal roots (1M P), and the mesial and buccal root surfaces of the second molars (2M), followed by the distal root surface of the second premolars (2PM) and the mesial root surfaces of the 1M MB and P (ranging from 49.2% to 59.3%). At these root surfaces, the contact ratios decreased with age (P<0.05), but the lowest still reached a range of 29.4% to 57.9% in the 30- to 47-year-old group. CONCLUSIONS The 2PM distal root surface, the 1M MB mesial and palatal root surfaces, the 1M DB palatal root surface, and the 1M P and 2M mesial and buccal root surfaces most frequently contacted the MSW. Clinicians should observe the contact of root surfaces with the MSW, even in aged patients.
上颌窦与牙根的毗邻关系可能会阻碍正畸牙齿移动。本研究旨在使用锥形束计算机断层扫描（CBCT）探讨上颌窦壁（MSW）与上颌尖牙及后牙之间的关系。
检查317张CBCT图像，观察被检查牙根的近中、远中、颊侧和腭侧表面是否与MSW接触，并测量每个牙根表面与MSW的接触距离。采用逻辑回归和线性回归分析年龄和性别的影响。
在上颌第一磨牙近中颊根和远中颊根（1M MB和DB）的腭根表面、第一磨牙腭根（1M P）的颊根表面以及第二磨牙（2M）的近中和颊根表面观察到与MSW的最高接触率（范围为62.0%至73.2%），其次是第二前磨牙（2PM）的远中根表面以及1M MB和P的近中根表面（范围为49.2%至59.3%）。在这些牙根表面，接触率随年龄降低（P<0.05），但在30至47岁组中最低仍达到29.4%至57.9%的范围。
2PM远中根表面、1M MB近中和腭根表面、1M DB腭根表面以及1M P和2M近中和颊根表面最常与MSW接触。临床医生即使在老年患者中也应观察牙根表面与MSW的接触情况。
