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 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.

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.

Si-corrole-based fluoride fluorometric turn-on sensor

2020 ◽  
Vol 24 (05n07) ◽  
pp. 929-937
Author(s):  
Ewa Jaworska ◽  
Fabrizio Caroleo ◽  
Corrado Di Natale ◽  
Krzysztof Maksymiuk ◽  
Roberto Paolesse ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Linear Dependence ◽  
Porous Membrane ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Fluoride Ions ◽  
Acidic Solutions ◽  
Turn On ◽  
New Type ◽  
Receptor Layer

We present here a new type of fluoride ion optode, constituted by a highly lipophilic PVDF porous membrane modified with a liquid receptor layer containing the emission-active Si corrole F[Formula: see text] selective ionophore. For the optimized composition of the receptor layer, in acidic solutions an increase of Si-corrole emission was observed by increasing fluoride ion concentration, a behavior different from most porphyrinoid-based optical sensors. An observed linear dependence of the Si corrole emission intensity (read at 635 nm) was within the range 10[Formula: see text] to 10[Formula: see text] M of fluoride ions.

Automated Fluoride Ion Determination

1977 ◽  
Vol 14 (1-6) ◽  
pp. 275-278 ◽  
Author(s):  
David C. Cowell
Keyword(s):  
Continuous Flow ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Electrode Response ◽  
Kinetics Of ◽  
Fluoride Ion Selective Electrode ◽  
Automated Determination ◽  
Flow Techniques

A method is described, using standard continuous flow techniques, for the automated determination of serum 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 serum, and that equilibration of the electrode response is not a prerequisite for the measurement of fluoride ion. Recovery experiments are in the range 86·6–98·5%, in-batch precision is 1·0–6·1%, between-batch precision 5·5%, with carryover of −2·99%.

Determination of Fluoride in Fluoride Tablets and Solutions by Ion-Selective Electrode: Collaborative Study

1984 ◽  
Vol 67 (4) ◽  
pp. 682-684
Author(s):  
John R Marzilli ◽  
◽  
F L Acampora ◽  
L R Alexander ◽  
M Y Alpert ◽  
...  
Keyword(s):  
Sodium Fluoride ◽  
Collaborative Study ◽  
Ion Selective Electrode ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Mean Values ◽  
Coefficients Of Variation

Abstract A proposed method using the fluoride (F) ion-selective electrode has been developed for determining the fluoride ion concentration in tablets and solutions containing sodium fluoride. The method has been subjected to collaborative study. Eight samples consisting of 2 authentic fluoride solutions, 2 commercial fluoride solutions, and 4 commercial fluoride tablets were sent to each of 11 collaborators together with a copy of the method. Single assays on the authentic fluoride solutions known to contain 1 mg F/5 mL were performed with average recoveries of 99.5 and 99.6% and relative coefficients of variation (CV) of 2.11 and 1.91%, respectively. Single assays of 2 commercial fluoride solutions declared at 1 mg F/5 mL gave mean values of 0.994 and 0.990 mg and relative CV values of 1.88 and 2.36%, respectively. Single assays of 2 commercial fluoride tablet preparations declared at 0.5 mg F gave mean values of 0.485 and 0.478 mg and relative CV values of 3.12 and 3.71 %, respectively. Single assays of 2 commercial fluoride tablet preparations declared at 1 mg F gave mean values of 0.991 and 0.981 mg and relative CV values of 2.99 and 2.85%, respectively. The method has been adopted official first action.

scholarly journals In Vitro Studies concerning Selected Properties of a Composite Material Blended with Nanofluoroapatite Crystals

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7295
Author(s):  
Marta Zietek ◽  
Maciej Dobrzynski ◽  
Katarzyna Fita ◽  
Dorota Diakowska ◽  
Adam Watras ◽  
...  
Keyword(s):  
Composite Material ◽  
Saline Solution ◽  
Deionized Water ◽  
Fluoride Ion ◽  
Fluoride Release ◽  
Ion Release ◽  
Fluoride Ions ◽  
Long Time ◽  
Ion Emission

The aim of the paper was to determine the potential for fluorine release from an original composite material blended with nanofluoroapatite (FAp). The level of fluoride ion emission into deionized water and saline was studied over a period of 12 weeks. Values were recorded after 1, 3, 24, 48, 72, and 96 h and then weekly for a period of 12 weeks. There were statistically significant differences in the periods of fluoride ion release from 5%FAp and 2%FAp materials into saline solution as well as into deionized water. The highest fluorine release from 5%FAp + polymer was observed in the 10th and 11th week of incubation (for saline solution) and in the 9th, 10th, and 11th week (for deionized water). The highest fluorine release from 2%FAp + polymer was observed in the 9th, 11th, and 12th week of incubation for both environments. Total fluoride ion release from 5%FAp + polymer and mean fluoride release levels were similar in 5%FAp and 2%FAp in both environments. Both tested materials (5%FAp and 2%FAp) show the ability to release fluoride ions over a long time in the experimental environment.

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.

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