Study on temporal-mandibular joint position of Angle classⅡ division 2 malocclusion by CBCT / 重庆医学

ABSTRACT

Objective To analyze and compare the difference of the joint position between the Angle classⅡ division 2 malocclu-sion and individual normal occlusion by dental cone beam computed tomography (CBCT).Methods 23 patients with Angle classⅡdivision 2 malocclusion according with the experimental design were selected as the experimental group and 27 cases of individual normal occlusion as the control group.Each research subj ect was performed CBCT.The images in the oblique position perpendicular to the long axis of condyloid process were reconstructed by the Examvision software.Then the joint space was measured by the Au-toCAD software and and the positional relation of the condyloid process in the articular fossa was assessed by Pullinger analysis methods.The results were compared.Results 65.2% of the condylloid process in Angle classⅡ division 2 malocclusion is posteri-orly shifted,in individual normal occlusion,64.8% of the condylloid process is in the middle place.Conclusion The condylar posi-tion of Angle classⅡ division 2 malocclusion were abnormal relative to individual normal occlusion joint,which should be early cor-rected for inducing the joint to the normal position and avoiding the generation of the joint symptoms.