title: A lip-activated appliance in early orthodontic treatment.
abstract: After reviewing the modes of action and types of lip-activated appliances, three cases were reported. A mandibular lip-activated appliance was used to gain space among the incisors and mesial to the mandibular permanent first molars; a maxillary lip-activated appliance was used to correct an anterior crossbite by labial movement of the incisors; and a modified lip-activated appliance was used to expand maxillary molars buccally.
mesh_terms: D000202:Activator Appliances; D002648:Child; D004867:Equipment Design; D005260:Female; D006801:Humans; D008046:Lip; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008311:Malocclusion, Angle Class I / Q000628:therapy*; D009968:Orthodontic Appliances, Removable