A cephalometric study evaluating the sagittal jaw relationship in the bengali population using the beta angle

Background and Objectives: In orthodontic diagnosis and treatment planning, the assessment of anteroposterior (AP) discrepancy is of importance to the orthodontist. Both angular and linear measurements have been incorporated into various cephalometric analyses to help the clinician diagnose AP discrepancies and establish the most appropriate treatment plan. Hence, the present study is designed to establish the norms of beta angle to assess the sagittal discrepancy for Bengali population. Materials and Methods: The samples were screened from the records of the patient who visited Orthodontic Department. 254 pretreatment cephalometric radiographs were divided into three groups based upon Angle’s Class I, II, III. The three cephalometric parameters ANB angle, Wit’s appraisal and Beta angle were compared in each group. A total of 254 subjects were included in the study with the age group between 12 and 18 years old. Results: The ANOVA showed that the 3 parameters are not the same, Beta angle is more significant than Wits appraisal followed by ANB. Conclusion: The Beta angle was developed as a diagnostic aid to evaluate the sagittal jaw relationship and it is more consistent than Wits appraisal followed by ANB angle. The findings of ANB angle, Wits appraisal and Beta angle was unable to find any variation from the standard values of other populations.