MOTION 3D APPLIANCES MOTION 3D Appliances MOTION 3D Appliances are used to employ the SAGITTAL FIRST Philosophy to achieve an ideal Class I platform at the beginning of treatment prior to placing brackets or aligners when there are no competing forces operating and patient compliance is at its highest. Please refer to the Motion 3D Appliances section beginning on page B-1 for complete details. K-2 INTRAORAL