Apparent solubility distributions of hydroxyapatite and enamel apatite

Shellis, R.P.; Wilson, Rory M.

doi:10.1016/j.jcis.2004.06.016

Cited by 44 publications

(40 citation statements)

References 42 publications

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“…At equilibrium the concentration c s is proportional to H 4/5 , so the linear model is a reasonable approximation. We also point out that the dependency of initial caries progress on the pH level is known to be smooth Shellis and Wilson (2004), which gives further support to the approximation we use here.…”

Section: = C/csupporting

confidence: 75%

A mathematical model for the progression of dental caries

Fabregas

Rubinstein

2013

Mathematical Medicine and Biology

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Section: = C/csupporting

confidence: 75%

A mathematical model for the progression of dental caries

Fabregas

Rubinstein

2013

Mathematical Medicine and Biology

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“…14 This result is due to the differences between both [Ca 2+ ] and [PO 4 3) ] concentrations being quantitatively smaller than for [OH ) ]. Although the mean concentration of calcium and phosphate were not significantly different among each buffering capacity group, even after 50 lL HCl titration, the pH change for individuals has a significant influence on the rate of Ip HA in this study.…”

Section: Discussionmentioning

confidence: 99%

“…The assumptions were that the concentrations of calcium and phosphate bound to salivary proteins or organic compounds were very low, and its effect on the Ip HA value was not significant. As calcium species, only ion pairs of CaHPO 4 , HPO 4 2) and PO 4 3) were taken into account for the calculation.…”

Section: Measurement Of Total Phosphate Concentrationmentioning

confidence: 99%

“…1,3 Ip HA in the demineralizing medium has a pronounced effect on enamel dissolution, and is regarded as having a considerable influence on the rate of caries incidence. 4 Moreover, thermodynamic solubility of the enamel mineral was calculated in Ip HA . 5 The concentration of chemical ions in plaque such as hydrogen, calcium, phosphate and fluoride will govern enamel de-and remineralization, and is associated with caries experience.…”

Section: Introductionmentioning

confidence: 99%

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Relationship between quantitative assessments of salivary buffering capacity and ion activity product for hydroxyapatite in relation to cariogenic potential

Aiuchi

Kitasako

Fukuda

et al. 2008

Australian Dental Journal

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Background: The ion activity product for hydroxyapatite (Ip HA ) is a comprehensive parameter reflecting pH, calcium and phosphate ion concentration in saliva which govern the degree of saturation with respect to the dissolving tooth mineral. The aim of this study was to evaluate the relationship between quantitative assessments of salivary buffering capacity and Ip HA in relation to cariogenic potential. Methods: Stimulated whole saliva was collected from 33 patients, and the initial pH of samples was measured using a handheld pH meter. Then samples were titrated with 0.1 N HCl to evaluate buffering capacities and divided into three groups (high, medium and low). After measuring concentrations of calcium and phosphate ions in the samples, Ip HA was calculated using the values of the ion concentrations and pH. Differences in the mean pH values, the concentrations of calcium, phosphate ions and log[Ip HA ] among three groups were analysed using the Kruskal Wallis and the Mann-Whitney nonparametric test, p < 0.05. Results: After HCl 50 lL titration, there were statistical differences of the mean pH and Ip HA among each buffering capacity group. Moreover, after 50 lL HCl titration, there was an excellent correlation between the buffer capacity and log[Ip HA ]. Conclusions: The pH change for saliva after HCl titration has a significant influence on the rate of Ip HA .

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“…Further, the size and perfection of HA crystals may influence the rate of erosion, since smaller or less perfect crystals are more susceptible to dissolution [40]. Finally, the presence in biological apatite of carbonate ions and of other impurities may impact upon solubility [41,42]. The greater susceptibility of dentine to erosive demineralisation is well known and has been attributed to a combination of its porosity and its relatively small crystallites of HA [29].…”

Section: Poly(alkyl Methacrylate) Barrier Coatingsmentioning

confidence: 99%

Poly(alkyl methacrylate) Tooth Coatings for Dental Care: Evaluation of the Demineralisation-Protection Benefit Using a Time-Resolved In Vitro Method

et al. 2011

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An in vitro method for the time-resolved quantification of acid-mediated tooth demineralisation has been developed and evaluated against putative non-permanent protective formulations based on a series of poly(alkyl methacrylate)s. Using a thermostatted carousel, dentally relevant substrates consisting of hydroxyapatite discs or sections of bovine teeth have been exposed to aqueous citric acid under controlled conditions, before and after being treated with the polymeric coatings. The dissolution of phosphate was monitored by the determination of 31 P by Inductively Coupled PlasmaMass Spectrometry and by the spectrophotometric phosphovanadomolybdate method. Dose-response plots constructed for both groups of treated substrates have revealed that the coatings significantly reduce erosion rates but are less effective at inhibiting tooth demineralisation than the standard fluoride treatment. The approach has enabled an evaluation of the erosion-protection efficiency of each coating.

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Apparent solubility distributions of hydroxyapatite and enamel apatite

Cited by 44 publications

References 42 publications

A mathematical model for the progression of dental caries

A mathematical model for the progression of dental caries

Relationship between quantitative assessments of salivary buffering capacity and ion activity product for hydroxyapatite in relation to cariogenic potential

Poly(alkyl methacrylate) Tooth Coatings for Dental Care: Evaluation of the Demineralisation-Protection Benefit Using a Time-Resolved In Vitro Method

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