Dr. Marta Baird reviews nature of the Class III bite for young patients. She describes the reason for treatment and the types of appliances used. Two patient examples are shown with before and after treatment from Phase I with an orthodontic face mask, all the way to Phase II with Invisalign. Without orthodontic treatment, the maxilla is prevented from its normal forward growth. Early intervention prevents the need for more invasive treatments such as surgery or extractions.