title: Fluoride concentrations and distribution in premolars of children from low and optimal fluoride areas.
abstract: We have compared the fluoride (F) concentrations from the enamel surface to the dentino-enamel junction (DEJ), and through dentine to the dentino-pulpal junction (DPJ) in premolars extracted from school children in Chemnitz (former Karl-Marx-Stadt), Germany (F: 1.0 ppm in the water supply), Erfurt, Germany (F: 0.2 ppm in the water supply) and Nagoya, Japan (F: 0.1 ppm in the water supply). In teeth from children in Cheminitz, Erfurt and Nagoya, the profiles of F distribution using an abrasive microsampling technique revealed high F concentrations in the enamel surface, with a substantial decrease towards a plateau in the interior. In dentine the F concentrations were higher than in enamel, and also decreased to a plateau from the DEJ, thereafter increasing considerably towards the DPJ. F concentrations at any depth in the enamel and dentine of teeth from Chemnitz were 2-3 times higher than those in Erfurt and Nagoya. There was no significant difference in F concentrations or distributions between Erfurt and Nagoya. Close to the DEJ in both enamel and dentine as well as the enamel surface and the DPJ side of dentine, higher F concentrations were observed in Chemnitz compared with Erfurt and Nagoya.
authors.affiliation: Department of Preventive Dentistry, Aichi-Gakuin University, Nagoya, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Takeuchi
authors.forename: H
authors.initials: H
authors.lastname: Nakagaki
authors.forename: Y
authors.initials: Y
authors.lastname: Toyama
authors.forename: N
authors.initials: N
authors.lastname: Kimata
authors.forename: F
authors.initials: F
authors.lastname: Ito
authors.forename: C
authors.initials: C
authors.lastname: Robinson
authors.forename: J A
authors.initials: JA
authors.lastname: Weatherell
authors.forename: L
authors.initials: L
authors.lastname: St-osser
authors.forename: W
authors.initials: W
authors.lastname: Künzel
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000737:chemistry*; D002648:Child; D003743:Dental Enamel / Q000737:chemistry; D003782:Dental Pulp / Q000737:chemistry; D003804:Dentin / Q000737:chemistry; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis*; D005858:Germany; D006801:Humans; D007564:Japan; D010758:Phosphorus / Q000032:analysis; D014881:Water Supply / Q000032:analysis*
chemical_list: D010758:Phosphorus; D005459:Fluorides