Correction of Single-Tooth Crossbite Using a 2x4 Appliance: A Clinical Case Report

The 2x4 appliance is a versatile treatment modality that consists of bands cemented or bonded to the first permanent maxillary molars with brackets bonded to the labial surface of maxillary incisors. A continuous archwire is engaged in the buccal tubes of the molar bands through the brackets of the incisors. This arrangement enables comprehensive control over the anterior teeth, allowing a change in their positioning through precise and efficient movements. The appliance does not require frequent adjustments, is well-accepted by patients, and contributes to expedited treatment outcomes. This case report details the correction of a single-tooth anterior crossbite with the use of a 2x4 appliance. The results not only met the aesthetic expectations of the patient but also addressed the concerns of the parents.