The Twin Block Appliance can also be used to close an anterior open bite. This design utilizes the standard 70-degree occlusal bite blocks to initiate a functional correction of a skeletal Class II -- while the anterior teeth are left slightly out of contact with the appliance to encourage reduction of the open bite. Leaving all posterior teeth in contact with the blocks prevents their eruption. Every time the patient swallows, lip action works to close the open bite. The labial bow can also be adjusted to actively move the anteriors lingually. In this example, the upper appliance has tongue loops -- positioned lingual to the upper anterior teeth -- to inhibit the effects of an anterior tongue thrust. In addition, a transpalatal wire with spinner is added to help retrain tongue position and control tongue thrust.