2X4 APPLIANCE

This provides a comprehensive review of the 2x4 fixed orthodontic appliance emphasizing its utility in early interceptive orthodontic treatment during the mixed dentition stage. It details the appliance's design historical evolution indications advantages over removable appliances and treatment protocols. The 2x4 appliance comprising brackets on the four upper incisors and bands on the first molars connected via an archwire enables precise three-dimensional tooth movement and is highly effective in correcting anterior and posterior crossbites incisor crowding midline diastemas and ectopic or impacted teeth. Numerous clinical case reports demonstrate its rapid predictable results with minimal relapse. This underscores the appliance's practicality cost-effectiveness and psychological benefits for young patients promoting early treatment to simplify or eliminate the need for future comprehensive orthodontic interventions.