Oral appliance, system and method for correcting class III problems of mandibular prognathism

A method for correcting a malocclusion in the mouth of a user, the method comprising the steps of:

• providing an appliance having a generally U-shaped upper body and a generally U-shaped lower body, wherein the upper body has lingual protrusions extending therefrom and the lower body has a bumper defining a labially enlarged area with respect to an outer boundary across a labial portion of the lower body, the bumper extending forward of the upper body;
• positioning a trough of the lower body relative to the user's lower incisors to achieve contact therebetween, the trough being defined by walls extending along the perimeter of the lower body;
• positioning the lingual protrusions relative to the maxilla, the lingual protrusions being configured to contact the maxilla when the appliance is worn within the user's mouth;
• and
• positioning the bumper relative to lips of the user to achieve contact therebetween and to cause a lower jaw of the user to move rearward to an upper jaw of the user as the appliance is worn within the user's mouth;
• wherein the lingual protrusions have a center tab extending rearward from a center of the upper body and a side tab adjacent to each side of the center tab, the center and the side tabs being configured to move the maxilla and the user's upper teeth forward with respect to the mouth in response to pressure from the tongue.