Alternative Orthodontic Treatment for Adult Crossbites and Overbites
Orthodontic treatment for deep bite cases in adults has traditionally involved either a removable anterior bite plane to supraerupt posterior teeth, or active intrusion of anterior teeth using reverse curve archwires. Headgear and the Nance appliance are also used, but are more appropriate for growing patients. Resolving deep bites may become a necessity in order to bracket lower anterior teeth. As many patients with deep bites exhibit decreased vertical dimension caused by insufficient eruption of posterior teeth appropriate treatment allows their supra-eruption to a normal vertical dimension. Although bite plane therapy causes some intrusion of anterior teeth, the greater part of deep bite correction results from posterior extrusion and occurs within 6 months, effectively. Increasing vertical dimension has been accomplished to restore lost vertical dimension due to enamel erosion, and in certain cases it may aid in temporomandibular disorder treatment. Removable anterior bite planes can accomplish this, but require continuous patient compliance and are difficult to use while eating, a time when posterior re-intrusion may occur.