title: A study of the space closure following premature extraction of primary first molar.
mesh_terms: D002648:Child; D003724:Dental Arch / Q000033:anatomy & histology*; D006801:Humans; D008334:Mandible; D008437:Maxilla; D008644:Mesial Movement of Teeth / Q000209:etiology*; D008963:Molar; D011183:Postoperative Complications; D014080:Tooth Exfoliation; D014081:Tooth Extraction; D014085:Tooth Migration / Q000209:etiology*; D014094:Tooth, Deciduous / Q000601:surgery*