Abstract
The aims of this study were to evalu-ate the effect of orthodontic treatment on root length (ratios of root length after / be-fore treatment) of the upper anterior teeth after correction of Class II division 1 inci-sal relation, to evaluate the time of treat-ment and its effect on root resorption and to show if there is any risk of root resorp-tion in relation to sex.
The sample was composed of 25 pat-ients (15 females and 10 males) 15–25 ye-ars old age. All patients were treated with 22×30 slot brackets fixed stainless steel Roth system appliances after extraction of bilateral maxillary first premolars. The ca-nines were retracted individually along the base arch wire with power chain elastics that were changed every 1 week, then the four upper incisors were retracted with ve-rtical loops.
The results of periapical radiograph measurements before and after treatment indicated that there were a noticeable apic-al root resorption with blunted irregular apex after the completion of orthodontic treatment. The incisor roots were affected more than the canines. In addition, there were no gender differences in root resor-ption between males and females (except upper left lateral incisor). The mean treat-ment time from beginning to end of treat-ment and obtaining Class I incisal relation was 21.4 months.
