Anterior Open Bite (incomplete)

Signs & Symptoms: Flared and spaced maxillary incisors, lingually positioned lower incisors, narrow upper arch

Causes:
1) digit sucking
2) abnormal tongue function
3) increased LAFH, backward growth rotation
4) Muscular dystrophy (decrease in muscle tone -> mandible rotates downwards -> increased LAFH)
5) Iatrogenic open bite due to poorly fabricated appliance
6) Pathological AOB - cleft lip, palate and trauma

Treatment options: Stop habit, intraoral appliance (maxillary lingual arch with anterior crib device)