安氏Ⅱ类1分类错[牙合]患者翼外肌MRI表现与关节盘位置和髁突运动度关系的初探

Relationships between MRI image changes of lateral pterygoid muscle, disc position and condylar mobility in Class Ⅱ patients

目的分析安氏Ⅱ类1分类错[牙合]患者翼外肌MRI异常与关节盘位置、髁突运动度的关系。方法选择20例安氏Ⅱ类1分类错[牙合]患者（10～12岁），MRI检查双侧翼外肌，卡方检验分析其与关节盘位置、髁突运动度的关系。结果40侧关节中18侧（45％）翼外肌异常，与关节盘位置、髁突运动度无明显相关关系。结论本组安氏Ⅱ类1分类错[牙合]患者无症状翼外肌异常的比率较高，但不能确定其与关节盘位置、髁突运动度相关。

Objective To analyze the relationships between MRI image changes of lateral pterygoid muscle （LPM）, disc position and condylar mobility. Methods Twenty Class Ⅲ patients were chosen and MRI images of LPM were taken. The relationships between MRI image changes of LPM, disc position and condylar mobility were analyzed. Results The rate of MRI image changes of LPM in Class 11 1 patients was about 45%. No significant correlations were found between MRI image changes of LPM, condylar mobility and disc position. Conclusions MRI image changes of LPM in Class Ⅱ 1 patients was common but no significant correlations were found between MRI image changes of LPM, condylar mobility and disc position.