Nanjing Stomatological Hospital, Medical School of Nanjing University, 210008 Nanjing, China.
Department of Prosthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, 210008 Nanjing, China.
Arch Oral Biol. 2022 Sep;141:105489. doi: 10.1016/j.archoralbio.2022.105489. Epub 2022 Jun 20.
The aim of this study was to use the cone beam computed tomography (CBCT) to study the relationships between the lip-line and mandible deformity.
CBCT data of 20 patients with jaw deformity (experimental group) and 20 patients without mandible deformity (control group) were selected. Use three-dimensional cephalometry to measure the reconstructed images of CBCT data simulated by the Materialise Interactive Medical Image Control System (Mimics), mark the related points, lines and planes of the three-dimensional craniomaxillofacial structure, and measure relevant distances and angles. The T-test, Pearson correlation analysis and Linear regression were used to analyze the characteristics of the lip-line and jaw deformity.
There was a significant difference in the lip-line between mandible deformity group and control group. Significant positive correlations could been found among the lip-line cant, the occlusal plane cant, the mandibular plane cant and the degree of mandible deformity (r=0.964, 0.942, 0.611, P < 0.01). A linear relationship was found between the left lip-line cant Y and the menton deviation X [the mandible deflection to the right was defined as positive, and the left lip-line below frankfort horizontal was viewed as positive] as Y= 0.340 + 0.505X.
The lip-line of patients with jaw deformity was inclined, and the lip-line cant was positively correlated with the degree of mandible deformity, and there was a certain linear relationship between the two, which could provide a theoretical reference for clinicians to diagnose and treat patients with mandible deformity.
本研究旨在使用锥形束 CT（CBCT）研究唇线与下颌骨畸形之间的关系。
选取 20 例颌骨畸形患者（实验组）和 20 例无下颌骨畸形患者（对照组）的 CBCT 数据。使用三维头影测量法对 Materialise Interactive Medical Image Control System（Mimics）模拟的 CBCT 数据进行重建图像测量，标记三维颅颌面结构的相关点、线和平面，并测量相关距离和角度。采用 T 检验、Pearson 相关分析和线性回归分析方法分析唇线与颌骨畸形的特征。
下颌骨畸形组与对照组唇线存在显著差异。唇线倾斜度、咬合平面倾斜度、下颌平面倾斜度与下颌骨畸形程度之间存在显著正相关（r=0.964、0.942、0.611，P<0.01）。左侧唇线倾斜度 Y 与颏点偏距 X 之间存在线性关系[下颌骨向右侧偏为正，法兰克福平面以下的左侧唇线为正]，Y=0.340+0.505X。
颌骨畸形患者的唇线倾斜，唇线倾斜度与下颌骨畸形程度呈正相关，两者之间存在一定的线性关系，可为临床医生诊断和治疗下颌骨畸形患者提供理论参考。
