Kwon T-G, Park H-S, Ryoo H-M, Lee S-H
Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, Samduck 2 Ga, Jung Gu, Daegu 700-421, South Korea.
Int J Oral Maxillofac Surg. 2006 Jan;35(1):43-8. doi: 10.1016/j.ijom.2005.04.006. Epub 2005 May 31.
This study intended to evaluate the morphological characteristics of the cranial base and maxillomandibular structures of facial asymmetry in adult patients, so as to determine whether mandibular asymmetry is a result of primary mandibular deformity or if it is influenced by cranial base deformity. Forty-two adult patients with dentofacial deformity were placed into two groups according to the deviation of the chin: Asymmetry group (n = 24) and Non-asymmetry group (n = 18). They were compared with three-dimensional (3D) CT reformatted images using a 3D visualization and analyzing program. The differences between the two groups, the correlation between the cranial base and maxillomandibular asymmetry were evaluated statistically. The degree of cranial base asymmetry in the Asymmetry group was not statistically different from the Non-asymmetry group. The asymmetric condyle position was found to be associated with skull base characteristics. The 3D position of the condyle and cranial base, however, was not closely related with mandibular asymmetry. The results showed that the cranial measurement variables were not the dominant factors that determined the degree of facial asymmetry. It seems that the mandibular skeletal factors itself, functional or intrinsic asymmetric growth potential, compensate or aggravate the influence of cranial asymmetry during the growth period.
本研究旨在评估成年患者面部不对称时颅底及上颌下颌结构的形态特征，以确定下颌不对称是原发性下颌畸形的结果，还是受颅底畸形的影响。42例牙颌面畸形成年患者根据颏部偏斜情况分为两组：不对称组（n = 24）和非不对称组（n = 18）。使用三维（3D）可视化分析程序，将他们与三维CT重组图像进行比较。对两组之间的差异、颅底与上颌下颌不对称之间的相关性进行统计学评估。不对称组的颅底不对称程度与非不对称组无统计学差异。发现不对称的髁突位置与颅底特征相关。然而，髁突和颅底的三维位置与下颌不对称没有密切关系。结果表明，颅骨测量变量不是决定面部不对称程度的主要因素。似乎下颌骨骼因素本身、功能性或内在的不对称生长潜力，在生长期间补偿或加重了颅不对称的影响。
