Zhao Keke, Zhang Bo, Hou Yunwen, Miao Limin, Wang Ruixia, Yuan Hua
Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, People's Republic of China.
Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, People's Republic of China.
Surg Radiol Anat. 2019 Apr;41(4):455-460. doi: 10.1007/s00276-019-02195-x. Epub 2019 Jan 30.
The purpose of this study was to investigate the Gonial angle in relation to the position of the lingula using computerized image analysis to guide the oral surgeons to prevent injury to the inferior alveolar nerve and peripheral blood vessels during surgery.
We measured Gonial angle sizes of bilateral rami and the distances from the lingula tip to the mandibular notch (LN), the anterior (LA) and posterior (LP) margin of the mandibular ramus, the mandibular base (LB) and the occlusive plane (h) in 407 Chinese adults with CBCT.
In males, the mean distance of LN was 17.64 mm in the low Gonial angle group while 16.76 mm in the high Gonial angle group, which was significantly different between two groups (P < 0.001). The distance of LA in LGA group was obviously longer than that in HGA group (P < 0.001). The mean distance LP of men was 17.94 mm in LGA group while 16.9 mm in HGA group (P < 0.001). In females, the mean distance of LB in LGA group was 33.32 mm and 32.37 mm in HGA group (P < 0.01).
We discovered that the segment of the mandibular branch, between the mandibular lingula and the mandibular angle, was obviously smaller in the HGA group than that in the LGA group.
本研究旨在利用计算机图像分析研究下颌角与舌骨位置的关系，以指导口腔外科医生在手术中预防下牙槽神经和外周血管损伤。
我们使用锥形束计算机断层扫描（CBCT）测量了407名中国成年人双侧下颌支的下颌角大小，以及舌骨尖端到下颌切迹（LN）、下颌支前缘（LA）和后缘（LP）、下颌骨基部（LB）和咬合平面（h）的距离。
在男性中，低下颌角组LN的平均距离为17.64毫米，而高下颌角组为16.76毫米，两组之间差异显著（P < 0.001）。低下颌角组LA的距离明显长于高下颌角组（P < 0.001）。低下颌角组男性LP的平均距离为17.94毫米，高下颌角组为16.9毫米（P < 0.001）。在女性中，低下颌角组LB的平均距离为33.32毫米，高下颌角组为32.37毫米（P < 0.01）。
我们发现，高下颌角组下颌舌骨与下颌角之间的下颌支节段明显小于低下颌角组。
