Objective To investigate the characteristics of condylar movement and the morphologic characteristics of TMJ in adolescent patients with Angle Ⅱ 1 malocclusion. Methods 15 Angle Ⅱ 1 adolescent patients and 15 normal occlusion adolescent patients without TMD symptom were included in this study. Computer Aided Diagnosis Axiograph (CADIAX compact 2) was used to record and analyze the condylar movement. TMJ transcranial lateral oblique radiographs were taken and analyzed with the computer aided diagnosis and management system. Results When the distance of condylar movement was 5mm in every mandibular movement, the sagittal condylar inclination in patients was bigger than in the control (P ＜ 0. 05 ). In all kinds of mandibular movements, the tracing of condylar movement was significantly longer ( P ＜ 0. 05 ). A l and A2 were significantly decreased in Angle Ⅱ 1 patients ( P ＜ 0. 05 ). Conclusion There were typical characteristics in condylar movement and TMJ morphology in Angle Ⅱ 1 adolescent patients.%目的:探讨安氏Ⅱ1青少年髁突运动轨迹特征及相应的颞下颌关节形态特征.方法:选取青少年安氏Ⅱ1及直面型个别正常(牙合)各15例,应用髁突运动轨迹描记仪(CADIAX compact 2 )记录分析髁突运动轨迹特征,并且应用改良颞下颌关节闭口薛氏位X线片测量分析颞下颌关节形态特征.结果:下颌功能运动时,安氏Ⅱ1错(牙合)髁突位移5mm时矢状髁道倾斜度与对照组相比明显增大(P<0.05).髁突矢状位移、垂直位移及矢状面空间总位移明显增加(P<0.05).安氏Ⅱ1错(牙合)关节窝前斜面与水平面夹角及关节窝前、后斜面夹角明显减小(P<0.05).结论:安氏Ⅱ1青少年髁突运动轨迹及颞下颌关节形态具有典型的特征.
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