Reliability of SAR Angle in Assessing Anteroposterior Apical Base Discrepancy in Different Growth Patterns

Aim and Objective: The aim of this study was to compare and verify the accuracy of SAR angle in predicting sagittal jaw discrepancy among subjects with different growth pattern. Materials and Method: The study material includes lateral cephalometric radiographs of ninety individuals with thirty in each group. It was further divided into three subgroups as hypodivergent, normodivergent and hyperdivergent with 10 samples per group. The SAR angle was measured as given by the author using FACAD. The values of SAR angle obtained for each subgroup was subjected for statistical evaluation. Results: The mean of groups 1, 2 and 3 were 55.98±2.24, 50.18±2.70 and 63.65±2.25 respectively. Oneway ANOVA shows a statistically significant difference between horizontal and vertical growth patterns in skeletal class III cases with a significance value of 0.013 (P<0.05). Conclusion: Within the limitations of the study, it is concluded that SAR angle can be used as a reliable alternative measurement to determine the discrepancy in apical jaw bases.