..., crossover study was done to determine whether the [F] in dental plaque is related more to the [F] of the dentifrice used or to the plaque concentrations of calcium and magnesium. The subjects (n = 13) were adults and residents of a city served with fluoridated drinking water. After 1 week of using...

...R.K. Rose; R.P Shellis; A.R. Lee The cation-bridged fluoride binding model proposed previously was tested by measuring fluoride binding to Streptococcus mutans R9 in the presence and absence of calcium, magnesium or zinc ions. The dissociation constant for fluoride binding to washed cells was 8.4...

...R.K. Rose Calcium bound by oral bacteria may have important effects on plaque cohesion and mineral dynamics. Equilibrium dialysis was used here to study the effect of magnesium and zinc competition on calcium-binding by Streptococcus sanguis 7863. Experiments were carried out using 45 Ca in 0.1–5.0...

..., and the magnesium concentrations were elevated in the groups exposed to NH 4 compounds and in the 10% CO 2 group. Microradiographic analysis revealed severe disturbances in the mineralization pattern of incisor enamel in both acidotic groups, but normal enamel in the other groups. Enamel fluoride and magnesium...

...M. Okazaki; J. Takahashi; H. Kimura Hydroxyapatites with various magnesium contents were synthesized at 80 °C and pH 7.4 to study their physicochemical stability. The contraction of their c-axis dimensions observed in X-ray diffraction analysis, together with the result of chemical analysis...

... fluoridated enamel surface was 4.4, whereas the added fluoride concentration of 25 ppm elevated the final pH by 0.5 unit. Added magnesium had no effect on pH values. Magnesium was released from the cells during the sucrose fermentation and the fluoride addition prevented this release by one half, whereas...

...H. Luoma; T. Nuuja To elucidate further our previous findings on the corrective effects of dietary magnesium, phosphate and fluoride additives on the disturbed calcium phosphate balance of the body, including caries, the experimentation was continued by varying the basal diet and the concentration...

...Anja-Riitta Luoma; H. Luoma; J. Räisänen; H. Hausen The effect of fluoride and magnesium on bovine enamel through a fermenting Streptococcus mutans layer was investigated. The enamel slabs with the microbial layer were incubated for 18 h at 37 °C. The addition of fluoride at a concentration of 25...