下颌偏斜患者下颌侧方运动时髁突的运动轨迹特征

目的 通过记录下颌偏斜患者的髁突运动轨迹，研究此类患者髁突运动的规律。方法 下颌偏斜患者31例（男性9例，女性22例），年龄12～26岁，平均18岁。使用CADIAX　Ⅲ型髁突运动轨迹轴图描计仪，记录并通过配对t检验和秩和检验分析患者下颌侧方运动时髁突的运动轨迹，并将其与患者下颌偏斜量进行多元线性回归分析。结果下颌偏斜患者下颌侧方运动时髁突的运动轨迹不对称，偏斜侧的运动位移大于非偏斜侧，差异有统计学意义（P＜0．01）；偏斜侧髁突的水平倾斜度小于非偏斜侧，差异有统计意义（P＜0．01）。随着偏斜量的增加，偏斜侧与非偏斜侧髁突的位移差距也相应增加，非偏斜侧髁突的位移相应减小，差异有统计学意义（P＜0．05）。结论下颌偏斜患者不仅颅面形态不对称，下颌侧方运动时髁突运动轨迹在长度、角度等方面也不对称，其与偏斜量有一定的相关性。

Condylar lateral movements in patients with mandibular deviation

OBJECTIVE: To record condylar movements of patients with mandibular deviation and analyze their characteristics. METHODS: Computer aided diagnosis axiography (CADIAX III) was used to record and analyze condylar lateral movements in 31 patients (9 males, 22 females and the age range 12 - 26, mean age 18 years old) with mandibular deviation. Paired-t test and rank sum test were used to compare condylar movements. Multinomial logistic analysis was used to clarify the relationship between condylar movement and mandibular deviation. RESULTS: The condylar lateral movements in patients with mandibular deviation were asymmetric. The tracing of the shifted side was longer than the contralateral side (P < 0.01). The transverse inclination of the shifted side was smaller than the contralateral side (P < 0.01). With the increase of deviation, the movement length difference between the two sides increased and the length of contralateral side decreased (P < 0.01). CONCLUSIONS: The patients with mandibular deviation not only have morphological asymmetry but asymmetric condylar movement length and inclination in lateral movements. There is specific relationship between condylar movement and mandibular deviation.