Abstract
The aim of this report was to present the results of most effective intraoral upper molar distalization system supported with mini-screw. The mini-screws with a 2.0 mm diameter and 8 mm length were used for intra-osseous anchorage. The screws were placed right and left buccal side of the maxilla. Nickel-titanium (NiTi) coil springs were set bilaterally on a 0.016 inch diameter NiTi archwire between the first molar tubes and the first premolar braces. The first premolars were ligated to the mini-screw to provide anchorage. Other mini-screws with a 2.0 mm diameter and 10 mm length were placed right and left palatal side. A spring consisted of a 0.017 × 0.025 inch beta-titanium-alloy wire situated palatally. The activated wire was inserted among the first molar palatal sheath and the mini-screw. Distalization of the upper molars was achieved in average 5 months. According to the results, the maxillary first molars showed mean 4 mm distal movement and 4° distal tipping.
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