A simple tongue-thrust appliance.
D000202:Activator Appliances; D002648:Child; D005260:Female; D005386:Fingersucking / Q000517:prevention & control; D006801:Humans; D008311:Malocclusion, Angle Class I / Q000209:etiology; D009968:Orthodontic Appliances, Removable; D014061:Tongue Habits