Root resorption during maxillary molar intrusion with clear aligner: a randomized controlled trial

ABSTRACT Objectives To compare changes in maxillary molar root resorption, intrusion amount, dentoskeletal measures, and maximum bite force (MBF) between clear aligners (CA) fixed appliances with miniscrew (FM) during intrusion. Materials Methods Forty adults anterior open were randomized into either CA or FM groups. Lateral cephalograms, cone-beam computed tomography (CBCT), MBF collected at pretreatment (T0) 6 months of treatment (T1). Maxillary intruded by nickel-titanium (NiTi) closed-coil spring delivered (150 grams/side) while combined squeezing exercise performed CA. Parametric tests used for statistical analysis. Results After treatment, significant resorption 0.21–0.24 mm 0.38–0.47 found molars 0.68 1.49 FM, respectively. showed less than FM. Overbite, closing, increased significantly. significantly overbite SN-MP but more increase was correlated the amount (r = 0.736, P < .05). Conclusions half months. The one-third distance. displayed closing positively amount.