Establishment of cephalometric norms for four sagittal skeletal discrepancy indicators in Andhra population

Abstract

Background: In orthodontic diagnosis assessment of sagittal skeletal discrepancy has greater importance and it aids in treatment planning. Aim: To establish cephalometric norms for sagittal dysplasia using four parameters WITS, ANB, Beta and YEN in Andhra population. Materials and Methods: Sample consisted of 90 pretreatment conventional lateral cephalograms and WITS, ANB, Beta, YEN were measured. Statistical analysis included mean, standard deviation, reciever operative characteristic (ROC) analysis. Results: ROC analysis shows range for WITS: −3 mm to +2.5 mm; ANB: 0° to 4.5°; Beta: 27° to 37° and YEN: 120° to 127°. Conclusion: Subjects with straight profile and class I occlusion showed higher range of values for all the four parameters. These values can be considered while assessing sagittal skeletal discrepancies which help in better orthodontic diagnosis and treatment plan of subjects residing in Andhra.

Keywords

• Beta angle
• ROC analysis
• sagittal dysplasia indicators
• YEN angle