Allergies, a deviated septum, or enlarged adenoids or tonsils force the child to breathe through their mouth
The presence of the thumb creates pressure that deforms the jaws and displaces the teeth (open bite).
If the tongue does not rest against the palate when swallowing, it pushes the teeth forward or creates an open bite.
Lips that are always slightly parted no longer exert the necessary pressure to guide the correct positioning of the teeth.
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