scholarly journals Bioavailable fluoride in calcium-containing dentifrices

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Peiyan Shen ◽  
James R. Fernando ◽  
Yi Yuan ◽  
Glenn D. Walker ◽  
Coralie Reynolds ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Deionized Water ◽  
The Other ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
Different Types ◽  
Poorly Soluble ◽  
Casein Phosphopeptide ◽  
Fluoride Ion Selective Electrode

AbstractCalcium added to dentifrices can complex with fluoride ions to reduce intra-oral bioavailability and therefore efficacy in preventing dental caries. Six commercially available dentifrices containing different types of calcium and fluoride were analyzed for total and bioavailable fluoride levels by adding 10 g of dentifrice to 30 mL of distilled deionized water and mixing vigorously for 1 min to simulate toothbrushing. One milliliter of the dentifrice/water slurry was immediately centrifuged and the supernatant removed for bioavailable fluoride analysis and the mixed slurry prior to centrifugation used for total fluoride analysis using a modified microdiffusion method. The concentration of fluoride was determined using a fluoride ion-selective electrode calibrated with internal fluoride standards. All the dentifrices had similar total fluoride concentrations to those indicated on their labels (94% to 105%). However, only one dentifrice that contained calcium in the form of casein phosphopeptide amorphous calcium phosphate (CPP-ACP) had almost 100% (97%) of fluoride in bioavailable form. The other dentifrices contained calcium carbonate and they exhibited significantly (p < 0.001) lower bioavailable fluoride levels (27% to 61%), through the generation of poorly soluble fluoride phases. The saliva biomimetic CPP, as CPP-ACP, in a dentifrice stabilised calcium and fluoride ions to maintain fluoride’s bioavailability.

scholarly journals EFFECTIVENESS OF SILVER DIAMINE FLUORIDE AND PROPOLIS FLUORIDE VARNISH APPLICATION ON DENTIN WITHIN 60 DAYS

2019 ◽  
pp. 190-193
Author(s):  
SRI ANGKY SOEKANTO ◽  
PRISCILLA DAYANARA ◽  
HABLI DAVIQ ◽  
AGOENG TJAHAJANI SARWONO ◽  
MUHAMAD SAHLAN
Keyword(s):  
Vickers Microhardness ◽  
Deionized Water ◽  
Ion Concentration ◽  
Permanent Teeth ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
Silver Diamine Fluoride ◽  
Group Assignment ◽  
Occlusal Surfaces

Objective: This study sought to analyze the effectiveness of silver diamine fluoride (SDF) and propolis fluoride (PPF) varnish application on dentinwithin 60 days.Methods: We divided 60 blocks (4 mm × 4 mm × 2 mm) of human permanent teeth dentin specimens into six time-based groups: 0 days, 1 day, 7 days,14 days, 30 days, and 60 days. We then applied 20 μL SDF and PPF varnish to the specimens’ occlusal surfaces. For the fluoride test, all specimenswere submerged in deionized water, while for the flavonoid test, specimens were submerged in a solution of 20% ethanol. In the treatment group,specimens were shaken for 30 min at 45 rpm (every day) for 0–60 days, depending on group assignment. An ion selective electrode was used tomeasure fluoride ions and a spectrophotometer with 425 nm wavelength absorbance measured flavonoid absorbance. Dentin microhardness wasmeasured for 30 and 60 days sample using the Vickers microhardness tester.Results: There was an increase in fluoride ion concentration after SDF and PPF application to the dentin samples, while SDF released more fluorideions than PPF. Increased flavonoid absorbance was observed after PPF application. Dentine microhardness increased after SDF and PPF application.Conclusion: SDF and PPF application on dentin is effective within 60 days.

scholarly journals Analysis of Fluoride Content in Alternative Milk Beverages

2019 ◽  
Vol 43 (6) ◽  
pp. 388-392 ◽  
Author(s):  
Janice A Townsend ◽  
Tatyana Thompson ◽  
Skylar Vaughn ◽  
Yapin Wang ◽  
Qingzhao Yu ◽  
...  
Keyword(s):  
Fluoride Concentration ◽  
Bovine Milk ◽  
Fluoride Ion ◽  
Soy Milk ◽  
Selective Electrode ◽  
Nutrition Labels ◽  
Whole Milk ◽  
Different Types ◽  
Fluoride Ion Selective Electrode ◽  
Mean Concentration

Background: The dentist has a responsibility to provide nutritional counseling and fluoride consumption recommendations. The purpose of this study was to measure and compare the concentrations of fluoride in a large number of alternative milk beverages and bovine milk. Study design: Thirty-three milk alternatives, including 9 diverse types and 11 different brands, were analyzed using a fluoride ion-selective electrode (ISE) and an ISE meter. Fluoride concentrations were then compared among different types and between different brands. Results: Fluoride concentration ranged from 0.01 ppm (Malk® Pure Cashew Milk) to 0.80 ppm (Almond Breeze® Original Unsweetened Almond Milk) with a mean concentration of 0.32 ppm. When compared, bovine whole milk (0.03±0.00 ppm) was found to be significantly lower in fluoride than all samples analyzed except Malk Pure Cashew Milk, Soy Milk Vanilla, Rice Milk, and Pecan Milk. Major differences also existed between the same milk alternative types of different brands. Conclusion: The amount of fluoride varies among different types of milk alternatives and different brands. To ensure that the dental team can provide proper recommendations regarding fluoride use, manufacturers should consider placing fluoride concentrations on nutrition labels.

scholarly journals Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode

2007 ◽  
Vol 52 (2) ◽  
pp. 155-168 ◽  
Author(s):  
Milos Rajkovic ◽  
Ivana Novakovic
Keyword(s):  
Drinking Water ◽  
Mineral Waters ◽  
Fluoride Content ◽  
Ion Selective Electrode ◽  
World Health ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
Fluoride Ion Selective Electrode

Potentiometric analysis of fluoride content (as F- ion) in solutions by using fluoride ion-selective electrode is simple, reliable and cheap. Very small concentrations of fluoride-ions (to 10-6 mol/dm3) can be determined by fluoride selective electrode, with regulation of ion strength of a solution and control of concentration of hydroxide ions and interfering ions of metals. The influence of pH and complexing ions of metals can be successfully regulated by the TISAB solution and by preserving pH value in the range from 5.00 to 7.00. The content of fluorides in the samples can be determined by the method of direct potentiometer, and in the case of very low concentration by standard addition method. In this paper it was analyzed the determination of fluoride ions concentration in bottled mineral waters and water from Belgrade plumbing in two Belgrade districts (Palilula and Novi Beograd) and in tea, by using the fluoride selective electrode. It was determined that the content of fluoride ions in bottled mineral water significantly differs from values given on declaration, and that content of fluoride ions varies over a period of time. The content of fluoride ions in water from plumbing in two Belgrade districts at the time of analysis was significantly increased and exceeded values given in Regulation for drinking water quality. The received results from the analysis of fluorides in teas show that fluorides exist in teas in different concentrations. There are also differences between the same kinds of tea, which is noted with mint (Mentha piperitae folium), as a consequence of differences between soils where it was planted. As taking of fluorides, according to World Health Organisation recommendation (WHO), is limited in the range from 2 to 4 mg per day, it is necessary to give the content of fluorides on all products that are used in human consumption.

Surface Enamel Fluoride Concentrations of Different Types of Human Teeth in a High- and Near-optimal-fluoride Area

1986 ◽  
Vol 65 (6) ◽  
pp. 945-947 ◽  
Author(s):  
S.R. Grobler ◽  
A.J. Louw ◽  
R.J. Rossouw
Keyword(s):  
Drinking Water ◽  
Fluoride Ion ◽  
Central Incisor ◽  
Selective Electrode ◽  
Human Teeth ◽  
Different Types ◽  
Acid Etch ◽  
Eruptive Period ◽  
The Mean ◽  
Fluoride Ion Selective Electrode

The surface enamel (~ 4 μm) fluoride concentrations of different tooth types (11, 21, 22, 23, 24) were determined in 12-13-year-old children who were life-long residents in a naturally high (3.70 ppm) and in a near optimal (0.62 ppm) fluoride area. Enamel biopsies were taken by means of an acid-etch procedure, and the fluoride levels were measured with an adapted fluoride-ion-selective electrode. The enamel fluoride concentrations were related to the fluoride levels of the drinking water, and it appeared that the enamel fluoride concentrations of the different tooth types (except for the pre-molars) were associated with the length of the pre-eruptive period. In general, for both areas, the mean enamel fluoride concentrations increased from the central incisor to the lateral incisor and were found to be the highest in the canine, while the mean fluoride content of the first pre-molar nearly equaled that of the central incisor. No statistically significant differences (p>0.05) were found between the enamel fluoride concentrations of the different tooth types or the etching depths, from different sexes.

Automated Fluoride Ion Determination

1977 ◽  
Vol 14 (1-6) ◽  
pp. 269-274 ◽  
Author(s):  
David C. Cowell
Keyword(s):  
Continuous Flow ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Automated Method ◽  
Electrode Response ◽  
Kinetics Of ◽  
Fluoride Ion Selective Electrode ◽  
Flow Techniques

An automated method is described, using standard continuous flow techniques, for the determination of urine fluoride ion concentration using a fluoride ion selective electrode. It is shown that the kinetics of the electrode response to changes in fluoride ion can be used for the accurate measurement of fluoride ion concentration in urine, and that equilibration of the electrode response is not a prerequisite for the measurement of fluoride ion. Recovery experiments are in the range 83 to 90%; in-batch precision is between 0·9 and 1·6% and carryover 2·5% or less.

Determination of inorganic fluoride in blood with a fluoride ion-selective electrode.

1987 ◽  
Vol 33 (2) ◽  
pp. 253-255 ◽  
Author(s):  
E Kissa
Keyword(s):  
Whole Blood ◽  
Fluoride Concentration ◽  
Ion Selective Electrode ◽  
Fluoride Ion ◽  
Inorganic Fluoride ◽  
Selective Electrode ◽  
Cell Potential ◽  
Novel Method ◽  
Fluoride Ion Selective Electrode

Abstract Inorganic fluoride in whole blood, serum, or plasma has been determined with a fluoride ion-selective electrode by adding the 0.5- to 2.0-mL sample to 20 mL of water containing a buffer and fluoride, 25 micrograms/L. The fluoride concentration in the sample is calculated from the resulting cell potential difference recorded after equilibrating for 10 min. This novel method has the advantages of simplicity, accuracy, and high precision, standard deviations for 5 to 7 replicate determinations of fluoride ranging from +/- 1.7 to +/- 2.4 micrograms/L. For whole blood from donors living in an area with fluorinated drinking water, the F- concentration was 20 to 60 micrograms/L.

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