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

Abas Ali Sahafian, Farzin Heravi, Morteza Oshagh, Leila Adab


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
Key Words: Begg, edgewise, peer assessment rating

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