Contemporary Ortho Appliances Practice Test

Controlling incisor torque during finishing with extraction therapy directly shapes how the front teeth relate to each other and to the bite. Torque refers to the sagittal angulation of the incisor roots relative to the crowns. When the torque is set correctly, the incisors sit with the proper crown inclination and root position so that the overjet (horizontal overlap) and overbite (vertical overlap) align with the bite plane and the anterior guidance is harmonized with the posterior occlusion. This alignment helps the posterior teeth meet evenly and creates a stable occlusion once the braces come off. If torque is incorrect, the incisors can flare forward or tip back, upsetting the overjet/overbite and making the occlusion more prone to instability and relapse. Torque isn't just about appearance; it has a direct impact on occlusion and long-term stability, and proper torque control supports a durable finish.