Goyushov Samir, Tözüm Melek Didem, Tözüm Tolga Fikret
Department of Periodontology, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA.
Surg Radiol Anat. 2018 Oct;40(10):1133-1139. doi: 10.1007/s00276-018-2043-z. Epub 2018 May 25.
To determine the shape, position, vertical height, surrounding bone characteristics, and opening angle of mental foramen (MF) using dental cone beam computed tomography (CBCT).
A retrospective study was performed on 663 patients. CBCT records analyzed for the shape, position, and surrounding bone measurements of the MF using Simplant 3D software (Hasselt, Belgium). Opening angle of MF was also assessed. Kruskal-Wallis and Mann-Whitney U tests were employed to test significant differences between parameters, genders and ages.
All mental foramina were visualized. Regarding location, 49.2% of the MFs were located between first and second premolars, 7.7 distal and 39.7% coincident to the apex of the mandibular second premolar. The mean MF opening angle was 45.4° on the right side, and 45.9° on the left. There were no statistically differences between gender groups with regard to the opening angle degrees.
This study may provide useful information about variations in the position, shape and size, angle of mental foramen, which may help the practitioners to perform safer mental nerve blocks and surgical procedures.
使用牙科锥形束计算机断层扫描（CBCT）确定颏孔（MF）的形状、位置、垂直高度、周围骨质特征及开口角度。
对663例患者进行回顾性研究。使用Simplant 3D软件（比利时哈瑟尔特）分析CBCT记录，以获取颏孔的形状、位置及周围骨质测量数据。同时评估颏孔的开口角度。采用Kruskal-Wallis检验和Mann-Whitney U检验来检测各参数、性别及年龄之间的显著差异。
所有颏孔均清晰可见。在位置方面，49.2%的颏孔位于第一和第二前磨牙之间，7.7%位于下颌第二前磨牙根尖远中，39.7%与下颌第二前磨牙根尖重合。右侧颏孔平均开口角度为45.4°，左侧为45.9°。不同性别组在开口角度上无统计学差异。
本研究可为颏孔的位置、形状、大小及角度变化提供有用信息，有助于从业者更安全地进行颏神经阻滞和外科手术。
