Fluoride concentrations at and near the neonatal line in human deciduous tooth enamel obtained from a naturally fluoridated and a non-fluoridated area.
This study sought to obtain a precise profile of fluoride concentrations at and near the neonatal line in deciduous incisors and canines from the naturally fluoridated area (1.0--1.3 parts/10(6) F in drinking water) of West Hartlepool and the non-fluoridated area (less than 0.1 parts/10(6) F in drinking water) of Leeds in England. An abrasive microsampling method was used to determine the distribution of fluoride and phosphorus concentrations. The profile of fluoride concentrations in 100-microm layers before and after the neonatal line, that is, in the prenatal and postnatal enamel, were significantly higher in teeth from the fluoridated than non-fluoridated areas. It was concluded that the fact that the fluoride concentrations were about the same prenatally and postnatally in deciduous enamel obtained from the fluoridated and non-fluoridated areas indicates that fluoride enters the prenatal deciduous enamel and that it is transferred through the placenta.
Toyama
Y
Y
Department of Preventive Dentistry and Dental Public Health, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan. nakagaki@dpc.aichi-gakuin.ac.jp
Nakagaki
H
H
Kato
S
S
Huang
S
S
Mizutani
Y
Y
Kojima
S
S
Toyama
A
A
Ohno
N
N
Tsuchiya
T
T
Kirkham
J
J
Robinson
C
C
D002118:Calcium / Q000032:analysis; D002675:Child, Preschool; D003743:Dental Enamel / Q000737:chemistry*; D004577:Electron Probe Microanalysis; D004739:England; D005260:Female; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis*; D006801:Humans; D008431:Maternal-Fetal Exchange; D010710:Phosphates / Q000032:analysis; D011247:Pregnancy
D010710:Phosphates; D005459:Fluorides; D002118:Calcium