Patients with a Class II Division 2 skeletal relationship exhibit a combination of a retroclined premaxilla, lingually tipped centrals with overlapping labially placed laterals and a posteriorly placed mandible that is locked into this position by a deep bite. The first step in correcting this problem is to treat the maxilla by developing the arch in an anterior-posterior direction. The primary objective of the Class II Division 2 Sagittal Appliance is to develop the premaxilla. This is accomplished by the activating the expansion screws and utilizing the extra anchorage created by intercuspating the opposing arch with the posterior bite plane. The laterals can then be guided lingually into place with T-springs. Note: A combination of anterior and posterior occlusal bite planes are commonly used in Sagittal appliances. A wax bite -- allowing about 1 to 1-1/2 mm of vertical opening measured between the most posterior teeth in the arch -- is needed to properly fabricate the appliance. This bite should be taken in the patient’s natural centric position.