Clinical Implications for Low and Average Smile Types In most deep overbite cases, intrusion will tend to hide the maxillary anterior teeth behind the upper lip in normal conversation. Such a mistake can go undetected by the orthodontist unless the patient's tooth display and smile are analyzed from the front. With increasing age and concomitant drooping of the upper lip, an unaesthetic anterior tooth display may worsen. In most orthodontic patients, except those with marked "gummy" smiles, active intrusion of the maxillary incisors is undesirable. The best treatment strategy in the majority of deep overbite cases is to actively intrude the mandibular incisors, using double tubes on the mandibular first molars and continuous or segmented base arches or utility arches
www.indiandentalacademy.com