CORELATION BETWEEN SOFT TISSUE AND HARD TISSUE WITS APPRAISAL IN EVALUATION OF FACIAL SAGITTAL RELATIONSHIP

Objective:To study the corelation between soft tissue and hard tissue Wits appraisal in evaluation of facial sagittal relationship.Methods:Sixty lateral head films were taken from adults with normal occlusion(30 male,30 female).Computerized digitizing system was used to measure hard tissue Wits and soft tissue Wits on the same cephalometric plane-occlusal plane.The correlation analysis among these measures was done by SPSS statistical package.Results:①The value of soft tissue Wits had higher correlation with the value of hard tissue Wits.The corelation was 0 746( P 0 001)②There was no significant difference in soft and hard tissue Wits between male and female.③The standard value of soft tissue Wits was 0 455±2 656.Conclusion:The soft tissue A、B point could substitute for the hard tissue A、B point in evaluation of facial sagittal relationship.