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Retention of the maxillary anterior teeth is commonly recommended to maintain the teeth in their corrected positions. Both fixed and removable retention methods are used, but the certainty of evidence is low. To evaluate post-treatment changes in irregularity of the maxillary six anterior teeth and single tooth contact point discrepancy (CPD) of three different retention methods. Three-arm parallel group single-centre randomized controlled trial. Ninety patients, 54 girls and 36 boys, were recruited to the study. The inclusion criteria wer
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