OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - JT - Journal of Aligner Orthodontics IS - 2514-7560 (Electronic) IS - 2514-7552 (Print) IP - 3 VI - 5 PST - ppublish DP - 2021 PG - 175-183 LA - en TI - Hybrid mechanics for early interceptive treatment of anterior crossbite FAU - Schmidt Dolci, Gabriel AU - Schmidt Dolci G FAU - Ferguson, Donald AU - Ferguson D FAU - Vaid, Nikhilesh R. AU - Vaid N FAU - Mah, James AU - Mah J FAU - Cardon, Stefan AU - Cardon S CN - OT - anterior crossbite OT - Class III treatment OT - clear aligners OT - extraoral traction appliance OT - growing patient OT - in-office aligners OT - interceptive orthodontics OT - maxillary arch expansion OT - removable orthodontic appliances AB - Early interception of anterior crossbite has functional, structural and aesthetic benefits that have been widely enumerated in the literature. The goal of early interception usually involves proclination of the maxillary incisors, thus eliminating mandibular anterior shift; maxillary disjunction and protraction to correct transverse and sagittal deficiencies, respectively; and maintenance or improvement of mandibular compensation, thus creating as much horizontal overlap as possible. The present study illustrates a case treated for 24 months with a modified Catalan appliance incorporated into in-office aligners. The treatment results highlighted the efficacy of hybrid mechanics for mandibular compensation and protraction of the maxillary dentition. The 5-year follow-up demonstrated relative stability of the final outcome. AID - 2116271