title: The effect of mandibular first premolar extraction on third molar space.
abstract: Change in molar space is compared in 48 mandibular first premolar extraction cases and 46 non-extraction cases over a five year period. Significantly greater increase in molar space is found in extraction cases. It is, to some extent, related to the initial degree of crowding.
authors.affiliation: Orthodontic Department, School of Dentistry, Royal Victoria Hospital, Belfast, Northern Ireland.
authors.forename: M E
authors.initials: ME
authors.lastname: Richardson
mesh_terms: D001641:Bicuspid / Q000601:surgery*; D002508:Cephalometry; D003724:Dental Arch / Q000033:anatomy & histology; D006801:Humans; D008310:Malocclusion / Q000473:pathology; D008334:Mandible; D008963:Molar / Q000033:anatomy & histology; D008964:Molar, Third / Q000033:anatomy & histology*; D012690:Serial Extraction