Irfan Qamruddin, Fazal Shahid, Hira Firzok, Maryam, Anum Tanwir.
Beta Angle: A Cephalometric Analysis Performed in a Sample of Pakistan Population.
J Pak Dent Assoc Jan ;21(4):206-9.

OBJECTIVE The purpose of this study is to evaluatethe reliability of a new cephalometric sagittal analysis i.e. Beta angle in Pakistani population and to compare its accuracy with angle ANB.Material and methods:One hundred and one pre-treatment cephalometric radiographs were traced and divided into 3 skeletal classes (class I, II, and III) based on angle ANB measurement. Betaangle was also traced and measured to obtain the values in all the skeletal classes and to compare with ANB angle to check the reliability.Results: The mean value of Beta angle for Class I skeletal pattern was (30.4°) ±2.6 SD, whilemean value for class II patients was (26.9°) ±6 SD. Beta angle for skeletal class III cases was (34.7°) ±5.4 SD. There was statistically significant negative correlation between ANB and Beta angle (r=0.59) while comparison of all skeletal classes also show significant difference between groups (p=0.00). Conclusion: Beta angle can be an alternate analysis to diagnose sagittal skeletal discrepancies with equal accuracy.

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