title: Magnets and orthodontics.
abstract: The first part of this paper is a literature review of magnets and their uses in orthodontics. The biological safety of magnets is considered and a report is given of experiments carried out on rat osteosarcoma cell line UMR-106. The second part of the paper describes a case where neodynium-iron-boron magnets were used to assist eruption of an unerupted, vertically impacted upper right canine. Previously, space was available for this tooth, but it failed to show signs of eruption. Following surgical attachment of a magnet, and the use of a second magnet attached to an upper removable appliance, rapid eruption occurred producing a favourable position for bonding.
authors.affiliation: London Hospital Dental Institute, Whitechapel.
authors.forename: P J
authors.initials: PJ
authors.lastname: Sandler
authors.forename: S
authors.initials: S
authors.lastname: Meghji
authors.forename: A M
authors.initials: AM
authors.lastname: Murray
authors.forename: S D
authors.initials: SD
authors.lastname: Springate
authors.forename: J R
authors.initials: JR
authors.lastname: Sandy
authors.forename: V
authors.initials: V
authors.lastname: Crow
authors.forename: R T
authors.initials: RT
authors.lastname: Reed
mesh_terms: D000818:Animals; D002455:Cell Division; D002460:Cell Line; D002648:Child; D003481:Cuspid; D004247:DNA / Q000096:biosynthesis; D004867:Equipment Design; D006801:Humans; D008280:Magnetics; D009967:Orthodontic Appliances; D010006:Osteoblasts / Q000166:cytology / Q000378:metabolism; D012516:Osteosarcoma; D051381:Rats; D014087:Tooth Movement Techniques / Q000295:instrumentation; D014097:Tooth, Unerupted / Q000628:therapy
chemical_list: D004247:DNA