A study of the condylar movement and morphologic characteristics of TMJ in Angle II~1 adolescent patients

Objective To investigate the characteristics of condylar movement and the morphologic characteristics of TMJ in adolescent patients with AngleⅡ1 malocclusion.Methods 15 Angle Ⅱ1 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(P0.05).In all kinds of mandibular movements,the tracing of condylar movement was significantly longer(P0.05).A1 and A2 were significantly decreased in AngleⅡ1 patients(P0.05).Conclusion There were typical characteristics in condylar movement and TMJ morphology in Angle Ⅱ1 adolescent patients.