不同垂直骨面型青少年患者上气道的CBCT研究

Three-dimensional analysis of upper airway in the adolescents with different vertical skeletal patterns by Cone-Beam CT image

目的:研究不同垂直骨面型青少年患者口咽部气道的差异。方法:收集88例矢状骨面型正常的青少年患者的CBCT影像,根据FH-MP角的值将其分为高角组、均角组及低角组,各组的性别和年龄相匹配。应用Dolphin软件进行上气道体积、截面积等的测量,比较各组间的差异及其与颌面部骨骼形态的相关性。结果:各组间的口咽、腭咽、舌咽体积、口咽段最小截面积以及会厌平面的截面积差异为高角组<均角组<低角组(P<0.05)。低角组的硬腭和软腭平面截面积大于均角组及高角组(P<0.05)。口咽各段的体积、截面积及最小截面积与FMA成负相关(P<0.05),除硬腭平面截面积外,其余各项与CoPo、Ar-Gn呈正相关(P<0.05)。结论:矢状I类不同垂直骨面型青少年患者上气道存在差异。

Objective:To study the difference of airway volume among the adolescent subjects with various vertical skeletal patterns. Methods:CBCT records of88adolescents with normal sagittal facial pattern were collected and divided into3groups according to their FH-MP angle.The subjects of the3groups were matched in age and sex.Airway volume and cross-sectional areas were compared among the3groups with Dolphin software.Correlation analyses of the airway dimensions with the maxillofacial variables was carried out.Results:There were statistical differences among the3groups in volumes of velopharynx,glossopharynx and oropharynx, minimal cross-section area of oropharynx and cross-section area on EP plane,and all the measurements decreased from low angle to normal angle to high angle groups(P<0.05).Cross-section areas of HP plane and SP plane in low angle group were significantly larger than that of the normal angle and high angle groups(P<0.05).The oropharyngeal airway dimensions showed negative correlation with FMA,and positive correlation with Co-Po,Ar-Gn(except cross-section area of HP).Conclusion:The pharyngeal airway volumes among different vertical skeletal patterns in adolescents are different.