title: Spontaneous changes in the incisor relationship following extraction of lower first permanent molars.
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D007180:Incisor; D008310:Malocclusion / Q000209:etiology*; D008334:Mandible / Q000601:surgery; D008963:Molar / Q000601:surgery*; D014081:Tooth Extraction / Q000009:adverse effects*