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Tongue thrusting is a type of orofacial myofunctional disorder, which is defined as habitual resting or thrusting the tongue forward and/or sideways against or between the teeth while swallowing, chewing, resting, or speaking. Abnormal swallowing patterns push the upper teeth forward and away from the upper alveolar processes and cause open bites.
A tongue crib is a removable appliance placed in the maxillary arch to stop the tongue thrusting habit. This appliance may be used in patients with mixed dentition or permanent dentition. The tongue crib is attached through a bar to two bands placed on the upper 1st molars. The crib is shaped like a horseshoe with metal bars that prevent thrusting.
Tongue thrust, also called reverse swallow or immature swallow, is a pseudo-pathological name for an adaptive lip seal mechanism, whereby normal nasal breathing or normal swallowing can occur. Tongue thrust can also be seen as an oral myofunctional disorder, a tongue muscle pattern that is perceived as clinically abnormal, in which the tongue ...
These can be affected by tongue malfunction such as tongue thrust. Accordingly, treatment of tongue thrust is essential for treatment of speech disorders, and oral myology therapy aiming at tongue muscles training is an important part of speech therapy. [3] [non-primary source needed]
Both fixed and removable functional appliances can be used to correct a malocclusion in three planes: Anterior-Posterior, Vertical and Transverse. In the Anterior-Posterior dimension, appliances such as Class II and Class III are used. Appliances used in transverse dimension are utilized to expand either the maxillary or the mandibular arch.
Tumors of the mouth and jaw, thumb sucking, tongue thrusting, pacifier use beyond age three, and prolonged use of a bottle have also been identified. [26] Lack of masticatory stress during development can cause tooth overcrowding. [37] [38] Children who chewed a hard resinous gum for two hours a day showed increased facial growth. [37]
"Overbite" may also be used commonly to refer to Class II malocclusion or retrognathia, though this usage can be considered incorrect. This is where the mesiobuccal cusp of the maxillary first molar is situated anterior to the buccal groove of the mandibular first molar; in other words, the mandible (lower jaw) appears too far behind the maxilla.
The appliance was split horizontally into an upper and lower part and a screw connect the two pieces of appliance. The occlusal surface of incisors in both arches are covered with acrylic. The screw used is named as Weise Screw. Turning the screw lead to the maxillary arch to move anteriorly and a back thrust of the mandible