European Journal of Molecular & Clinical Medicine

Abstract

Introduction: Sagittal relation of maxilla to mandible is one of the most important diagnostic criteria in orthodontics. A number of geometric parameters, such as ANB angle, Wits appraisal have been defined and used effectively for the same. Yen angle and W angle has developed recently. It is requisite to evaluate reliability and validity of Yen angle and W angle by comparing them with ANB and Wits appraisal.
Aim: To assess Yen angle and W angle and compare them with ANB angle, Wits appraisal in predicting sagittal jaw dysplasia.
 
Objective:

To compare newly introduced sagittal dysplasia indicator Yen angle  and W angle with ANB angle and wits appraisal in class I malocclusion.
To assess the reliability and validity of the Yen angle, W angle.
 To assess the correlation between these angles with each other in class I malocclusion.

Materials and Methods: Standardized pretreatment lateral cephalograms of 40 subjects with class I molar relation of orthodontic patients were collected and traced and all the four parameters i.e ANB angle , Wits appraisal, Yen angle, W angle were measured and compared. Independent t-test and Pearson’s correlation coefficient were used as statistical analysis.
Result: Statistically significant correlations were found among all the four measures; ANB angle, Wits appraisal, Yen angle, and W angle. Yen angle W angle shows highest correlation with ANB angle.
Conclusion: All the four sagittal indicators show a significant correlation with each other. Yen angle and W angle show highest correlation with ANB angle and least with wits appraisal. Yen angle and W angle can be used as sagittal jaw indicators in addition to the established measures.