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Posterior crossbites are most common malocclusion observed in both primary and permanent dentition. Lateral shift of the mandible is one of the effects exhibited in patients with posterior crossbite. The other effects associated are asymmetrical condylar positioning, neuromuscular disturbances with difference in loading patterns and the corresponding asymmetrical maxillo-mandibular dentoskeletal adaptations. The prevention of these effects requires early intervention of orthodontic treatment to achieve a stable occlusion in early stages of development. Achieving a normal closure pattern with elimination of functional shifts through correction of transverse discrepancy harmonizes the detrimental dentofacial esthetics. However, the restoration of harmony should be achieved during periods of dynamic growth. Early permanent dentition correction is less time consuming and more physiologically tolerable treatment options. This case report describes about a customized quad helix for the correction of unilateral posterior crossbite correction in a 13-year-old patient.

A customized quad helix: an appliance for management of unilateral posterior cross-bite