title: Semi-rapid maxillary expansion.
mesh_terms: D000202:Activator Appliances; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008310:Malocclusion / Q000628:therapy; D010155:Palatal Expansion Technique / Q000295:instrumentation; D012008:Recurrence