Authors : Jaina Dubey, Amitabh Kallury, Rajesh Kumar Balani, Chandni Bharti, Chandrika Dubey, Deepika Dhali
DOI : 10.18231/j.jco.2020.015
Volume : 4
Issue : 2
Year : 2020
Page No : 25-32
Aim-Purpose of this study is to compare the validity of different cephalometric angles like Beta, Yen, Pi and W angle for evaluating sagittal jaw dysplasia in Skeletal Class I and Class II malocclusion among Bhopal population and to obtain most reliable parameter for orthodontic diagnosis. Material and Method-120 pretreatment lateral cephalograms were selected on the basis of inclusion criteria and were divided into 2 groups (n= 60) i.e. Skeletal Class I and II on the basis of ANB Angle and Wits Appraisal between ages of 16-35 years which further subdivided into Male and Female (n=30). Landmarks were located, traced and analyzed. Results- There was statistically highly significant difference found for cephalometric parameters in Skeletal Class I and Class II Malocclusion. (p=0.001) Mean value of ANB angle was 1.917±1.37 and 6.292±1.27, Wits was -0.742±3.02 and 3.442±2, Beta angle was 31.692±4.41 and 24.125±5.60, Yen angle was 123.28±3.47 and 117.16±4.47, Pi angle was -0.658±3.37 and 4.817±3.14 and W angle was 55.792±2.61 and 52.017±3.34 among Skeletal Class I and II groups respectively. Yen angle (91.67 % & 76.67 % ) and Pi angle (90.00 % & 71.67 % ) had high sensitivity and specificity to discriminate between Class I & II. Cut off value was ? 3for Pi and >119 for Yen angle. Conclusion- Yen Angle is the most accurate and reliable parameter to differentiate between Skeletal Class I and Class II Groups with highest sensitivity and specificity followed by Pi Angle.
Keywords: Sagittal dysplasia, Beta Angle, Yen Angle, Pi Angle, W Angle.