安氏Ⅱ类1分类错(牙合)功能矫治前后患者髁突运动轨迹特征初探

目的：探讨功能矫治对安氏Ⅱ类1分类错[牙合]患者颞下颌关节功能的影响。方法：患者组（安氏Ⅱ类1分类错[牙合]）20例和对照组（安氏Ⅰ类）20人，记录患者组功能矫治前后及对照组开闭口运动时髁突运动状况，对结果进行秩和检验。结果：①相比对照组，患者组矫治前髁突轨迹明显垂直化，髁突垂直向位移[左侧为2．21（1．01）mm，右侧为1．12（1．02）mm]及倾斜度[左侧为12．89（9．12）°，右侧为12．12（8．89）°]偏大（P〈0．05）；②矫治后髁突轨迹在各个方向上的位移及倾斜度接近正常（P〉0．05）。结论：多数安氏Ⅱ类1分类错[牙合]患者的髁突运动轨迹有较稳定且可重复的特征；功能矫治对安氏Ⅱ类1分类错[牙合]患者的颞下颌关节功能调整有积极的作用。

Condyle movement in class Ⅱ division 1 malocclusion patients after functional appliance treatment

OBJECTIVE: To record and analyze the characteristics of condyle movement before and after functional treatment in Angle class II division 1 malocclusion (II(1)) patients. METHODS: Twenty Angle II(1) patients were included in the study and 20 Angle I patients without temporomandibular disorders symptoms served as controls. Computer aided diagnosis axiograph (CADIAX) was used to record the condyle movement in Angle II(1) patients and that caused by functional appliance treatment during mouth opening and closing. RESULTS: The tracing were vertically displayed. Value Z [L: 2.21 (1.01) mm, R: 1.12 (1.02) mm] and sagittal condylar inclination [L: 12.89 (9.12) degrees, R: 12.12 (8.89) degrees] were increased significantly in Angle II(1) patients compared with those in control group (P < 0.05). After functional treatment, the condyle movement in Angle II(1) patients was close to normal (P > 0.05). CONCLUSIONS: Typical characteristics of condyle movement were found in Angle II(1) patients and it was stable and repeatable. Functional therapy had a positive effect on temporomandibular joint function in Angle II(1) patients.