the advantages are : better aesthetics ( especially the appearance of the chin ) , more efficient action of the suprahyoid muscles ( mouth openers ) , diminished contact of the angle of the jaw with the sterno-cleido-mastoid muscle , increased distance of the lower incisors from the axis of rotation of the mandible ( resulting in increased incisal distance at the same rotational angle ) and the possibility of correction of the sometimes traumatic occlusion against the palatal mucosa all in the same session .
C0008114
chin
C0024687
mandible