A comparative study of treatment outcomes between begg and edgewise orthodontic systems in class I cases

Background: The purpose of this study was to compare the occlusal peer assessment rating (PAR) index in Class I patients treated by means of Begg and Edgewise methods. Materials and Methods: The pre- and post-treatment study models of Class I patients, referred to two private clinics, treated with Begg method (n = 30) and standard Edgewise method (n = 30), were reviewed retrospectively using PAR index including dental displacements, buccal occlusion (anteroposterior, vertical and transverse), overjet, overbite and midline parameters. The changes in PAR indices were analyzed using paired t-test. A P < 0.05 was considered as statistically signifi cant. Results: There was no signifi cant difference in sex and age distribution between the two groups. The improvement of buccal occlusion in patients treated by Begg method (1.51 ± 0.39) was signifi cantly higher than that of patients treated by Edgewise method (0.28 ± 0.39). The duration of treatment in Begg method (17.8 ± 1.3 months) was signifi cantly shorter than that of Edgewise method (23.7 ± 1.3 months). However, there were no signifi cant differences between the two methods in terms of total PAR index, dental displacements, overjet, overbite and midline. Conclusion: In conclusion, fi ndings of the present study indicated that Begg method might be associated with better improvement of buccal occlusion and shorter duration of treatment