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Anterior segment retraction; friction; frictionless; T-loop; anchorage; CBCT.
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Evaluation Of Anchorage Loss Following Anterior Segment Retraction Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial, Dorra Izzat Bakhit, Heba Mohamed Dehis, Yehia A. Moustafa, Fouad A. El Sharaby
Evaluation Of Anchorage Loss Following Anterior Segment Retraction Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial, Dorra Izzat Bakhit, Heba Mohamed Dehis, Yehia A. Moustafa, Fouad A. El Sharaby
Future Dental Journal
Objective: Evaluation of anchorage loss following anterior segment retraction (ASR) using friction versus frictionless mechanics when mini-screws are directly and indirectly loaded using Cone beam computed tomography (CBCT). Material and methods: Thirty females with bimaxillary protrusion were randomly allocated into two groups, friction and frictionless. In friction group, a hook was crimped on 0.017- by 0.025-inch stainless steel wire distal to the lateral incisor and elastomeric chain rendering 160 g/side extending between the hook and mini-screw implant to complete the ASR. In the frictionless group, canines were ligated to the mini-screws for indirect anchorage then ASR was done using closing …