A COMPARISON OF W ANGLE, PI ANGLE AND YEN ANGLE AS AN INDICATOR FOR ASSESSING ANTEROPOSTERIOR SKELETAL DYSPLASIA IN VARIOUS MALOCCLUSION AMONG REGIONAL POPULATION: A CEPHALOMETRIC STUDY

Background and Objectives The purpose of this study was to compare newly introduced sagittal dysplasia indicators, YEN angle, W angle and Pi angle in class I, II & III malocclusion and assess the reliability and validity of the YEN angle, W angle and Pi angle along with ANB and Beta angle. Methods 45 Pre-treatment lateral cephalograms of Angles Class I, II & III malocclusion taken from the archives of department of Orthodontics, were traced manually. For each subject the following cephalometric parameter were measured: ANB angle, Beta angle, YEN angle, W angle and Pi analysis. The data was analysed . Results There is no statistical significant differences between males and females for all the measured variables except ANB angle, and the measurements with most homogenous distribution in the group is YEN angle followed by W angle & Beta angle. Measurements with least homogenous distribution was the ANB angle followed by Pi angular & Pi linear. Conclusion All the performed cephalometric analyses are valid and can be used to evaluate sagittal discrepancies & there is no statistical significant differences between males & females for all the measured variables except for ANB Angle. The YEN angle is highly reliable and more homogenously distributed parameter followed by W angle & Beta angle. KEYWORDS: Sagittal Dysplasia, ANB Angle, Beta Angle, YEN Angle, W Angle & Pi Analysis