Cephalometric Analysis of the Facial Skeletal Morphology of Female Patients Exhibiting Skeletal Class II Deformity with and without Temporomandibular Joint Osteoarthrosis

PurposeThis study evaluated the differences in the facial morphological characteristics of female patients exhibiting skeletal class II deformity with and without temporomandibular joint osteoarthrosis.MethodsEighty-three female patients with skeletal class II deformity were included in this study; these patients were classified into three groups on the basis of the condylar features shown in cone-beam computed tomography scans: normal group, indeterminate for osteoarthrosis group, and osteoarthrosis group. The cephalometric differences among the three groups were evaluated through one-way ANOVA.ResultsOf the 83 patients, 52.4% were diagnosed with osteoarthrosis, as indicated by the changes in the condylar osseous component. The cephalometric measurements that represented skeletal characteristics, including mandibular position relative to the cranial base, mandibular plane angle (MP-SN), posterior facial height (S-Go), and facial height ratio, were significantly different among the three groups (p ConclusionsTemporomandibular joint osteoarthrosis is commonly observed in female patients with skeletal class II deformity. The morphological characteristics of the facial skeleton in patients with bilateral condylar osteoarthrosis may be altered.

目的：本研究旨在评估伴与不伴颞下颌关节骨关节病（temporomandibular joint osteoarthrosis）的骨性Ⅱ类畸形（skeletal class II deformity）女性患者的面部形态特征差异。
方法：本研究纳入83例骨性Ⅱ类畸形女性患者，依据锥形束计算机断层扫描（cone-beam computed tomography, CBCT）显示的髁突特征将其分为三组：正常组、骨关节病待定组、骨关节病组。采用单因素方差分析（one-way ANOVA）评估三组患者的头影测量差异。
结果：83例患者中，52.4%经髁突骨质成分改变确诊为骨关节病。三组间代表骨骼特征的头影测量指标存在显著差异，包括下颌骨相对于颅底的位置、下颌平面角（MP-SN）、后面高（S-Go）及面高比率。
结论：颞下颌关节骨关节病在骨性Ⅱ类畸形女性患者中较为常见。双侧髁突骨关节病患者的面部骨骼形态特征可能发生改变。