MRI of typical oral appliance-induced changes

Axial MRI images of the upper airway at the level of the velopharynx (upper panel), showing the effect of MAS in a complete responder to treatment. The arrow demonstrates the lateral widening of the velopharynx. The lower panel demonstrates 3D reconstructions of the upper airway showing the enlargement of total airway volume, mediated predominantly by lateral widening of the velopharynx.