Comparison and Correlation between Antegonial Notch, Symphysis Morphology and Ramus Morphology among Different Skeletal Patterns – A Cephalometric and OPG Study

Abstract

Aim- To compare and correlate between antegonial notch depth, symphysis morphology and ramus morphology in different skeletal patterns in Class I, Class II and Class III relationships. Methodology: 72 lateral cephalogram and orthopantomograms were be divided into three groups according to the skeletal parameters. Each group is subdivided into three groups based on Y axis: average skeletal pattern Horizontal skeletal pattern and Vertical skeletal pattern. Cephalometric linear and angular measurement and antegonial measurement using OPG were taken. Results and conclusion: The antegonial notch depth, symphysis height, symphyseal ratio was found to be highest in Class III Vertical skeletal pattern. Symphysis depth, ramal width was found to be highest in Class II Horizontal skeletal pattern. The symphysial angle was highest in Class I Horizontal skeletal pattern. The ramal height was more in Class III Horizontal skeletal pattern and least in Class II Vertical skeletal pattern. Antegonial notch shows strong positive corelation with symphysis height in Class III Horizontal skeletal pattern, and ramal height in Class III Average skeletal pattern. Symphysis height shows strong positive correlation with ramal height in Class I Average skeletal pattern, Class II Horizontal skeletal pattern, Class II Average skeletal pattern and Class III Horizontal skeletal pattern. Symphysis depth shows strong positive correlation with ramal height in Class II Horizontal skeletal pattern and Class III Average skeletal pattern, symphysis angle shows strong positive correlation with Class III Horizontal skeletal pattern.