Fluoride profiles in different surfaces of human permanent molar enamels from a naturally fluoridated and a non-fluoridated area.
The surfaces, sites and depths of fluoride profiles of enamel from a naturally fluoridated area (West Hartlepool, WHP, 1.9 parts/10(6) F in drinking water) and a non-fluoridated area (Leeds, LDS, < 0.1 parts/10(6) F in drinking water) were examined in detail. Using a regression curve, y = ax-b, comparisons of fluoride concentrations were made at depths of 1, 3, 5, 10, 20 and 30 microns at occlusal, middle and cervical sites of buccal, lingual, mesial and distal molar enamel surfaces. In the outermost enamels (< 10 mu in depth), fluoride concentrations tended to be lower in the occlusal sites than in the cervical sites. In interior enamels (> 20 microns in depth), the fluoride concentrations of molars from WHP were statistically higher than those from LDS, while few significant differences were found in the outermost layers. In the mesio- and disto-occlusal sites of approximal surfaces, there were some significant differences in the exponential regression coefficients of fluoride profiles between the two groups of molars.
Li
J
J
Department of Preventive Dentistry, School of Dentistry, Aichi-Gakuin University, Japan.
Nakagaki
H
H
Tsuboi
S
S
Kato
S
S
Huang
S
S
Mukai
M
M
Robinson
C
C
Strong
M
M
D003743:Dental Enamel / Q000737:chemistry / Q000378:metabolism*; D004739:England; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis / Q000493:pharmacokinetics*; D006801:Humans; D008875:Middle Aged; D008963:Molar / Q000737:chemistry / Q000378:metabolism; D012044:Regression Analysis; D013499:Surface Properties
D005459:Fluorides