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

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. 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. 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. 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