Master Program Dental Sleep Medicine, Catholic University of Murcia UCAM, Conde de Peñalver 61, 28006, Madrid, Spain.
Faculty of Engineering, University of Malaga, Flauta Mágica 22, 29006, Málaga, Spain.
BMC Oral Health. 2021 Jan 7;21(1):19. doi: 10.1186/s12903-020-01369-z.
The mandibular opening path movements have different directions according to the craniofacial morphology of the patient but always downward and backward, therefore increasing the collapse of the upper airway. The aim of this work is to determine if there is a relationship between the craniofacial morphology and the mandibular movement to help understand the impact on the mandibular position.
52 students with full permanent dentition aged 19 to 23 years (mean 21.3 SD 1.7; 29 females and 23 males), participated in the study. Each subject had a lateral cephalometric radiograph taken. The opening angle was determined for two levels of vertical openings at 5 and 10 mm.
The opening angle showed a greater variability between subjects ranging from 63.15 to 77.08 for 5 mm angle and from for 61.65 to 75.72 for the 10 mm angle. Differences of facial phenotypes was evident when comparing the individual dissoccluding angle of the low angle horizontal pattern and high angle vertical pattern.
The opening angle is related to craniofacial morphology with higher vertical anterior and shorter anteroposterior faces having a more horizontal path of mandibular movement than shorter vertical anterior and longer anteroposterior subjects who have a more vertical path.
下颌开口路径运动根据患者的头面部形态而具有不同的方向，但始终向下和向后，因此增加了上气道的塌陷。本工作的目的是确定头面部形态与下颌运动之间是否存在关系，以帮助了解对下颌位置的影响。
52 名年龄在 19 至 23 岁（平均 21.3 岁，标准差 1.7；女性 29 名，男性 23 名）的具有完整恒牙列的学生参加了这项研究。每个受试者都拍摄了侧位头颅侧位片。确定在 5 和 10 毫米两个垂直开口水平的开口角度。
开口角度在受试者之间显示出更大的变异性，5 毫米角度的范围为 63.15 至 77.08，10 毫米角度的范围为 61.65 至 75.72。当比较低角水平模式和高角垂直模式的个体离断角时，面部表型的差异是明显的。
开口角度与头面部形态有关，具有较高的垂直前牙和较短的前后面的面型具有比垂直前牙较短和前后面较长的面型更水平的下颌运动路径。
