Correlation of overjet, ANB and wits appraisal for assessment of sagittal skeletal relationship

ABSTRACT

The purpose of this study was to determine the sagittal skeletal relationship through overjet and its reliability in determining skeletal relationship by correlating it with ANB angle and Wits appraisal in Angle's class I, class II division I and class III malocclusion groups in a tertiary care hospital sample. On clinical examination overjet was measured with the teeth in centric occlusion. Lateral cephalograph was taken to measure the ANB angle and Wits appraisal. The correlational analysis of overjet with ANB angle in the three malocclusion classes showed, that there was a weak correlation of overjet with ANB angle in class III group with "r" value of 0.444 whereas P value showed statistical significance [P-value < 0.05]. The correlation of ANB angle in the other two malocclusion classes was weak as well as statistically insignificant i.e in class I [r = 0.106, P-value > 0.05] and in class II division I [r = -0.187, P-value > 0.05]. The correlation between overjet and Wits appraisal in class III was strong and statistically significant with the "r" value of 0.605 and P-value < 0.05. The results of correlational analysis showed that there was a weak correlation between overjet and Wits appraisal in class I and class II division I [r = 0.317 and 0.398 respectively], whereas class I correlation was statistically insignificant [P-value > 0.05] and class II division I was significant [P-value < 0.05]. This study concluded that overjet is a good predictor for sagittal skeletal relationship only in class III malocclusion