title: Second molar extraction in the treatment of lower premolar crowding.
abstract: Thirty-four children with lower premolar crowding were treated by extraction of second molars. Thirteen cases had mechanical lower arch treatment started not less than 6 months after extractions. The remainder had no treatment in the lower arch. The change in premolar crowding was measured, and the reasons why spontaneous alignment occurred in some cases and not in others were examined.
authors: Clinical Department of Orthodontics, School of Clinical Dentistry, Royal Victoria Hospital, Belfast.
authors: M E
authors: ME
authors: Richardson
authors: D J
authors: DJ
authors: Burden
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001641:Bicuspid / Q000473:pathology; D002508:Cephalometry; D002648:Child; D003724:Dental Arch / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000473:pathology / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D008963:Molar / Q000601:surgery*; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D012690:Serial Extraction / Q000379:methods; D014078:Tooth Eruption; D014087:Tooth Movement Techniques / Q000295:instrumentation; D014097:Tooth, Unerupted / Q000473:pathology