The Study On Condylar Movement Pathways In Patients With AngleⅢ Malocclusionin Permanent Dentition

[Objective] To investigate the condylar pathways during mandibular movemens in patients with Angle III malocclusion in permanent dentition.[Methods]30 subjects with Angle III malocclusion in permanent dentition were selected as a sample group ,other 30 subjects with normal occlusion in permanent dentitio were selected as a control group.Using Computer Aided Diagnosis Axiogrphy(CADIAX) recorded the condyle traces during various mandible movements,analysing and comparing the results.[Results] 1. The condyle pathways of AngleIII are similar to those of normal in shapes but different in extents. The movement oranges of all kinds are different significantly among individuals.The paths of two sides are not symmetric obsolutely during open-close and protrusion-retrusion movements.The pathways of Anglelll are not as well as those of normal.There are translations in the working sides during medio movements.2.There are not significant differences between the pathways of Anglelll and normal in all directions and both sexes during all movements.3.Compred with normal,the tra tracings in the left of Anglelll are smaller than those of the right during open-close movement,the diference is significant;During protrution and retrution movement,the sagittal and vertical and spacial movements of Anglelll are smaller than those of the normal while tran movement is more than the normal .there are no significant differences.The movements of AngleIIIare smaller than those of the normal in any directions during medio movements.[Results]The condyle movements ranges are different significant both in Anglelll and in normal.The condyle movements are not symmetric obsolutely.The movement ranges of Anglelll are smaller than those of the normal in any directions.