title: Effect of biteblocks and repelling magnets on root formation of unerupted premolars in Macaca monkeys.
abstract: The effect of repelling magnets on the root formation of unerupted teeth was studied in monkeys. Four controls, four monkeys with acrylic biteblocks and four monkeys with repelling samarium magnets embedded in biteblocks were observed for 12 weeks. After the monkeys were killed the teeth were examined histologically and the root formation evaluated. A clear influence on both the predentine formation and the Hertwig's root sheath was observed. The results clearly indicate the need for more long-term studies on the tissue reactions produced by repelling magnets.
authors.affiliation: Department of Orthodontics, Royal Dental College, Aarhus, Denmark.
authors.forename: B
authors.initials: B
authors.lastname: Melsen
authors.forename: J A
authors.initials: JA
authors.lastname: McNamara
authors.forename: C D
authors.initials: CD
authors.lastname: Hoenie
mesh_terms: D000818:Animals; D001641:Bicuspid; D002508:Cephalometry; D003782:Dental Pulp / Q000473:pathology; D003804:Dentin / Q000473:pathology; D004658:Enamel Organ / Q000473:pathology; D004867:Equipment Design; D008253:Macaca mulatta; D008280:Magnetics; D008297:Male; D009805:Odontogenesis; D009967:Orthodontic Appliances; D014092:Tooth Root / Q000473:pathology / Q000502:physiology*; D014097:Tooth, Unerupted / Q000473:pathology / Q000503:physiopathology*