@Article{, title={Evaluation of en-masse retraction using microimplant versus conventional techniques: An in vitro study}, author={Ahmed G. Mohammed Sharif احمد محمد شريف and Khidair A. Al-Jumaili خضير الجميلي}, journal={Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد}, volume={25}, number={special issue 1}, pages={120-125}, year={2013}, abstract={Background: The study aimed to investigate the effect of different techniques of en masse retraction on the verticaland sagittal position, axial inclination, rate of space closure, and type of movement of maxillary central incisor.Materials and methods: A typodont simulation system was used (CL II division 2 malocclusion). Three groups wereused group 1(N=10, T-loop), group 2(N=10, Time-Saving loop), and group 3(N=10, Microimplant). Photographs weretaken before and after retraction and measurements were made using Autodesk AutoCAD© software 2010. Kruskal-Wallis one-way analyses of variance and Mann-Whitney U test (p≤0.05) were used.Results: The rate of space closure showed no significant difference among the three groups (p≤0.05), while resultsregarding type of tooth movement showed a significant difference among the three groups (p≤0.05), where group3(0.59±0.09) showed a more degree of controlled tipping than group1(0.33±0.19) while group 2(-0.50±0.09) showedan uncontrolled tipping movement.Conclusions: It is concluded that microimplant anchored sliding mechanics gives better control over the en masseretraction mechanics and greater retraction. Conventional techniques result in extrusion and move the teeth in lessdegree of translation movement

} }