Fluoride concentrations and distribution in premolars of children from low and optimal fluoride areas.
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.
Takeuchi
K
K
Department of Preventive Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Nakagaki
H
H
Toyama
Y
Y
Kimata
N
N
Ito
F
F
Robinson
C
C
Weatherell
J A
JA
St-osser
L
L
Künzel
W
W
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*
D010758:Phosphorus; D005459:Fluorides