Correction of Anterior Open Bite with Clear Aligner: A Case Report
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Abstract
Background: This case report describes the orthodontic management of a 22-year-old Thai male with anterior open bite and a skeletal Class II hyperdivergent pattern. The patient exhibited a convex profile, increased lower anterior facial height, and severe crowding in the lower arch. Malocclusion presented as a large overjet (6 mm), negative overbite (−3 mm), and Class II canine and Class III molar relationships. A clear aligner system was chosen to address both aesthetic concerns and functional needs. Treatment objectives included correction of anterior open bite, establishment of Class I canine and molar relationships, resolution of crowding, improvement of dental midlines, and enhancement of facial profile. A total of 51 pairs of aligners were used in two sets, with interproximal reduction and expansion employed to create space and correct arch form discrepancies. After 26 months of treatment, normal overjet and overbite were achieved, both arches were well aligned, and a Class I molar and canine relationship was established. The patient’s profile improved with a normal smile line and reduced buccal corridor. Posttreatment records confirmed the stability of results with no root resorption or temporomandibular joint symptoms. Cephalometric evaluation showed improved incisor inclinations and a normalized interincisal angle. The patient successfully entered the retention phase with full-time wear of clear retainers. This case highlights the efficacy of clear aligners in treating complex malocclusions that include anterior open bite when case selection, biomechanics, and compliance are carefully managed.
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