effectiveness of laceback ligatures on upper incisor and anchorage

ABSTRACT

The purpose of this study is to evaluate the effects of laceback ligatures on the anteroposterior and vertical position of the upper incisors and the mesial position of the upper first molars during the alignment and leveling stage of orthodontic treatment of Class II Division 1 cases which require extraction of upper first premolars. This study was Randomized controlled trial [RCT]. The sample of this study comprised 44 subjects who showed Class II Division 1 malocclusion, and needed extraction of upper first premolars. Subjects were randomly allocated to two study groups. Patients in the first group received Laceback ligature treatment. In the control group, subjects were treated without the application of Laceback ligature. The insertion of rectangular steel arch wires [0.16x0.16] without an exaggerated curve and without generating excessive forces was considered the end of the alignment and leveling stage. All subjects were followed-up and lateral, anterioposterior cephalometeric x-rays were taken before the treatment and by the end of the alignment and leveling stage to detect any changes in the craniofacial complex. The statistical comparison between the laceback group and the control group revealed the following The angle I