Condylar movement trace in adolescent Angle II~1 malocclusion with mandibular retrusion

Objective To discuss the characteristic of condylar movement of adolescent AngleⅡ1 malocclusion with mandibular retrusion.Methods The sample included normal group and experimental group(25 subjects in each group).Condylar movement was recorded during mandibular movement with Computer Aided Diagnosis Axiograph(CADIAX).Results During open/close movement,the distance of condylar movement was smaller than that of the normal subjects.During protrusion/retrusion movement,protruded extension increased.During lateral excursion,the sagittal inclination of the non-working side condylar movement trace was larger than the protrusion movement trace.When the distance of condylar movement was 5 mm,the sagittal condylar inclination was bigger than that of the normal subjects.Conclusion Condylar movement trace of experimental group is significantly different from that of the normal group,maybe correlating to condylar position,overbite and overjet.