Assessing the Correlation between Cephalometric Measurements In Patients with Class II Malocclusion

Background and purpose: Some measurements such as angles and planes drawn in lateral cephalometry have different relationships and correlation coefficients which help to distinguish different types of malocclusions. The aim of this study was to investigate the correlation between ANB, Wits, occlusal plane, and Y-axis cephalometric measurements in patients with class II malocclusion. Materials and methods: A descriptive-analytical and retrospective cross-sectional study was performed using the lateral radiographic images (n=156) in the archive of the Dental Clinic affiliated with Golestan University of Medical Sciences obtained from patients aged 14-18 years of age with class II malocclusion in 2018-2019. Results: There were 91 (58.3%) lateral radiographic images of female patients, and 65 (41.7%) of male patients. The highest correlation was found between ANB and Wits measurements (r= 0.61) followed by ANB and Y-axis (r= 0.53), Wits and occlusal plane (r= 0.36), and Y-axis and occlusal plane (r= 0.33) and the lowest correlation was seen between ANB and occlusal plane measurements (r= 0.23). Conclusion: According to current study, it seems that in addition to ANB angle, other cephalometric measurements such as Wits, Y-axis, and occlusal plane can be used to diagnose class II malocclusion (based on their correlation coefficient with ANB).