Analysis of the Correlation between Yen and W Angles and Conventional Sagittal Discrepancy Indicators (ANB and Wits)

Aamir Waheed; Zubair Ahmed; Madeh ul Rehman; Alina Nadeem

Analysis of the Correlation between Yen and W Angles and Conventional Sagittal Discrepancy Indicators (ANB and Wits)

Authors

Aamir Waheed BDS, FCPS(R) CIMS Dental College Multan
Zubair Ahmed BDS,FCPS,CMT, HoD Orthodontic department CIMS Dental College Multan.
Madeh ul Rehman BDS, FCPS(R) CIMS Dental College Multan
Alina Nadeem BDS, Demonstrator CIMS Dental College Multan

Keywords:

Yen angle, W angle, ANB, Witt`s Appraisal

Abstract

Introduction: ANB angle has been used widely for the assessment of skeletal sagittal dysplasia. However several limitations have been associated with ANB angle. The aim of this research is thus to correlate YEN and W angles with conventional sagittal discrepancy indicators (ANB and Wits)

Methodology: Based on ANB angle, a sample of 165 participants were split up into three groups: Group 1 = Skeletal Class I, Group 2 = Skeletal class II, and Group 3 = Skeletal Class III. YEN angle and W angle was analyzed on lateral cephalogram and compared with ANB angle and Wits appraisal.

Results: Mean value of YEN angle for Class I was 123.15° ± 7.6°. Mean value of W angle for Class was 56.61°± 5.5°. Negative correlation of ANB with Yen angle, YEN (r = -0.640, p< .001), and W angle, W (r = -0.798, p < .001) and positive relationship between YEN and W angle (r = 0.675, p < .001) was found.

Conclusion: W and Yen angles can be used in patients as an alternative to ANB angle if reliability of ANB angle is questionable.