title: Distribution of fluoride in human dental calculus.
abstract: The distribution of fluoride in human dental calculus was investigated using a mechanical sampling technique and the fluoride electrode. The fluoride concentrations were highest at the outer surface of dental calculus and, then fell to a plateau for the interior of the calculus, rising again as the tooth surface was approached. The coefficient of variation of fluoride concentration was significantly greater in the sub- than in the supragingival calculus (p < 0.01). The supragingival calculus thus tended to show a smoother distribution profile for fluoride than the subgingival calculus. Total fluoride, average fluoride, and maximum fluoride concentrations were not significantly different in supra- and subgingival calculus. No significant different were observed between males and females.
authors.affiliation: Department of Preventive Dentistry, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Okumura
authors.forename: H
authors.initials: H
authors.lastname: Nakagaki
authors.forename: K
authors.initials: K
authors.lastname: Kato
authors.forename: F
authors.initials: F
authors.lastname: Ito
authors.forename: J A
authors.initials: JA
authors.lastname: Weatherell
authors.forename: C
authors.initials: C
authors.lastname: Robinson
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D003728:Dental Calculus / Q000737:chemistry*; D004577:Electron Probe Microanalysis; D005260:Female; D005459:Fluorides / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D010710:Phosphates / Q000032:analysis
chemical_list: D010710:Phosphates; D005459:Fluorides