骨性Ⅱ类不同矢状骨面型成人上气道容积和舌骨位置的锥形束CT研究

摘要

目的 应用CBCT研究成人骨性Ⅱ类不同矢状骨面型上气道的容积大小和舌骨位置.方法 按标准筛出180例CBCT影像资料并分为骨性Ⅰ类组,骨性Ⅱ类下颌后缩组和骨性Ⅱ类上颌前突组,每组60例.In vivo 5 软件进行三维重建,测量上气道容积及舌骨位置指标,并进行统计学分析.结果 三组鼻咽气道大小无统计学差异(P>0.05).口咽气道容积测量,骨性Ⅰ类组>骨性Ⅱ类上颌前突组>骨性Ⅱ类下颌后缩组,且下颌后缩组明显小于其他两组(P<0.05).三组之间舌骨位置的评价参数H-VPS之间存在差异(P<0.05).结论 骨性Ⅱ类不同矢状骨面型成人口咽气道容积大小存在差异,骨性Ⅱ类下颌后缩组舌骨矢状位置最靠后.颌骨、气道和舌骨三者之间存在一定关联.%Objective To investigate the upper airway volume and hyoid position in adults with different sagittal skeletal ClassⅡ malocclusion.Methods A total of 180 CBCT data were selected and divided into three groups of 60, ClassⅠ, Class Ⅱwith mandibular retraction and ClassⅡwith maxillary protrusion.The data were reconstructed by Invivo 5 software, and the upper airway volume and hyoid position were measured.Results There was no difference in nasopharyngeal volume among the three groups(P>0.05).The oropharngeal volume of ClassⅠgroup was greater than those of ClassⅡwith maxillary protrusion group and ClassⅡwith mandibular retraction group(P<0.05).The H-VPS of hyoid bone position was different among the three groups.Conclusion The upper airway volume in adults with different sagittal skeletal ClassⅡ maloclussion was different.Hyoid bone in Class Ⅱ with mandibular retraction lies the most posterior.