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Anterior open bite resulted from tongue thrusting in a 24 y.o. patient. Anterior upper teeth are not touching their counterpart. Anterior open bite (AOB) is defined as a condition in which there is no contact and no vertical overlap of the lower incisor crown with the upper incisor crown when the mandible is in full occlusion. [19]
An open bite malocclusion is when the upper teeth don't overlap the lower teeth. When this malocclusion occurs at the front teeth it is known as anterior open bite. An open bite is difficult to treat due to multifactorial causes, with relapse being a major concern. This is particularly so for an anterior open bite. [58]
Mandibular setback surgery is a surgical procedure performed along the occlusal plane to prevent bite opening on the anterior or posterior teeth and retract the lower jaw for both functional and aesthetic effects in patients with mandibular prognathism. [1] [2] It is an orthodontic surgery that is a form of reconstructive plastic surgery. [3]
Prevent relapses after orthodontic treatment; Improve the relationship between dental arches; reduce open bite and overjet; Maintain overall facial muscle tone needed for chewing, swallowing, and speech; Create an oral environment that creates favorable conditions for the development of dentition; Eliminate dry mouth condition or xerostomia
When the maxillary and mandibular incisors do not contact even when the mouth is fully closed, an anterior open bite occurs. This misalignment of teeth may result from some habits, such as thumb-sucking. On the other hand, when the contact of the mandibular incisors to the maxillary incisors is near or completely on the gingiva, a deep bite occurs.
Orthodontic work after children lose most of their baby teeth can help correct these problems. Cooper recommends that at around age 7 or 8, children visit an orthodontist for an evaluation.
The normal range is considered to be between 25 and 30 degrees in a typical Caucasian person. Those with excess vertical jaw growth are most often seen having an anterior open bite, as the mandible is growing away from the maxilla. Whereas those with excessive horizontal growth are seen as having an overbite.
3.c Anterior or posterior crossbites with >1mm but ≤2mm discrepancy between the retruded contact position and intercuspal position 3.d Displacement of teeth >2mm but ≤4mm 3.e Lateral or anterior open bite >2mm but ≤4mm 3.f Increased and incomplete overbite without gingival or palatal trauma Grade 2 (little treatment need)