An appliance for correcting unilateral maxillary constriction in children with crossbite

Relevance . Unilateral maxillary constriction is common in children and is associated with crossbite. This highlights the need to improve the diagnosis, treatment, and rehabilitation of this condition. Objective . To improve the treatment of unilateral maxillary constriction in children with crossbite. Materials and methods . An appliance was developed to correct unilateral maxillary constriction in children with crossbite (patent application No. 2026109837, April 6, 2026). It was used to treat 28 patients during the development of the permanent dentition. Treatment was provided at two sites in Yakutsk: the dental outpatient clinic within the M. K. Ammosov North-Eastern Federal University Clinic and the Micheer Dental Clinic. Results . Unilateral maxillary constriction was successfully corrected in all patients within 3–6 months. On the side opposite the constriction, the appliance incorporates an occlusal bite block with impressions of the mandibular posterior teeth and a raised lingual flange. On the constricted side, the occlusal bite block has no impressions of the mandibular posterior teeth, a design intended to enhance the clinical effectiveness of the appliance. A buccal shield in the posterior region relieves muscular pressure on the posterior teeth on the constricted side and allows the maxillary teeth to move freely. During orthodontic treatment of maxillary constriction in children with crossbite, the appliance restores mandibular biomechanics and stomatognathic function. Conclusion. Use of the appliance for correction of unilateral maxillary constriction in children with crossbite promotes correction of the constriction, normalizes occlusal relationships between the dental arches, creates space for movement of crowded maxillary teeth and optimal eruption of permanent teeth, and supports proper occlusal development, thereby improving children’s quality of life.