目的:比较轻度颅面微小症(CFM)和非综合征性II级不对称的双颌手术后的面部不对称。
方法:对Pruzansky-KabanI型和IIACFM(CFM组,n=20),非综合征性II类骨骼不对称(II类组,n=20),和正常对照组(对照组,n=20)进行比较。量化了下面部和颌骨的面积不对称性。基于Landmark的方法用于评估下面部中线的不对称性,Cants,和轮廓。
结果:CFM组和II类组之间的半面和半颌区域不对称术后没有显着差异,两者均显著大于对照组。CFM组和II类组之间的中线偏差以及嘴唇和咬合角没有显着差异。CFM组的垂直轮廓不对称性明显大于II类组。与对照组相比,前突的偏差,鼻下,和软组织的精神,嘴唇和咬合槽,CFM组矢状和垂直轮廓不对称性明显较大,II类组的鼻下和软组织方向的偏差以及垂直轮廓的不对称性。
结论:术后轻度CFM的垂直轮廓不对称性明显大于非CFMII级,而区域不对称,中线偏差,Cants,下面部矢状轮廓不对称性无明显差异。
结论:请注意纠正轮廓的垂直不对称性,唇,CFM中的牙列仍然具有挑战性。
OBJECTIVE: To compare the facial asymmetry after bimaxillary surgery between mild craniofacial microsomia (CFM) and non-syndromic class II asymmetry.
METHODS: Cone-beam computed tomography scans of adults with Pruzansky-Kaban types I and IIA CFM (CFM groups, n = 20), non-syndromic skeletal class II asymmetry (Class II group, n = 20), and normal controls (control group, n = 20) were compared. The area asymmetry of lower face and jaw bones was quantified. Landmark-based method was used to evaluate the lower facial asymmetry regarding midline, cants, and contour.
RESULTS: There were no significant postoperative differences in the hemi-facial and hemi-jaw area asymmetry between CFM and Class II groups, both of which were significantly larger than the control group. No significant difference was found in the midline deviation and lip and occlusal cants between CFM and Class II groups. The vertical contour asymmetry in CFM group became significantly larger than Class II group. Compared to the control group, the deviation of pronasale, subnasale, and soft-tissue menton, lip and occlusal cants, and sagittal and vertical contour asymmetry in CFM group were significantly larger, as were the deviation of subnasale and soft-tissue menton and vertical contour asymmetry in Class II group.
CONCLUSIONS: The vertical contour asymmetry of mild CFM was significantly larger than non-CFM class II after surgery, while the area asymmetry, midline deviation, cants, and sagittal contour asymmetry of lower face showed no significant difference.
CONCLUSIONS: Be aware that correcting vertical asymmetry of contour, lip, and dentition in CFM is still challenging.