Examinando por Materia "Fluoride concentration"

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(Universidad Privada Norbert Wiener, 2017) Córdova López, Ofelia; Arellano Sacramento, Cesar
The objective was to determine the fluoride concentration in ppm in children's toothpaste marketed in Lima, Peru, in 2017. The research was observational, descriptive, and cross-sectional. A non-random sample of 8 brands of pediatric toothpaste was collected from pharmacies and drugstores in Lima, with a total of 48 samples (6 from each brand) since 8 brands were available in the market. The Student's t-test and Wilcoxon test for a single sample were used for analysis. Results: The difference between the labeled fluoride concentration and what was found based on the median was: Colgate Smile® 6 years: 119.8 ppm, Oral B Pro Salud Stages®: 57.05 ppm. The difference between labeled fluoride concentration and what was found based on the average was: Colgate Smile 2-5 years®: -31.2 ppm, Farmadent Kids®: -36.27 ppm, Dentito®: -520.1 ppm, Aqua Fresh Little Teeth® (2-5 years): 41.68 ppm, Vitis Junior®: 141.85 ppm, Aqua Fresh Big Teeth® (6 years and older): 112.82 ppm; of those, only Aqua Fresh Little Teeth® (2-5 years) was not significant. Regarding the pH of the toothpastes, the values were: Colgate Smile® 6 years: 5.92, Colgate Smile® 2-5 years: 5.5, Oral B Pro Salud Stages®: 5.5, Farmadent Kids®: 6, Dentito®: 6, Aqua Fresh Little Teeth® (2-5 years): 5.5, Vitis Junior®: 5.5, Aqua Fresh Big Teeth® (6 years and older): 6. Conclusion: Three toothpastes had fluoride concentrations lower than labeled, and five toothpastes had higher concentrations than labeled (with one of them being not significant).
Acceso abierto
Effect of 1.23% acidulated fluorphosphate and 2% sodium fluoride on the fracture resistance of resin-modified glass ionomer
(Universidad Privada Norbert Wiener, 2024-06-14) Canales Rios, Alexandra Yveth; Menacho Angeles, Gregorio Lorenzo
The methodological design was observational, comparative, and cross-sectional. A total of 45 samples of glass ionomer discs with a resin composition from a commercial brand (Vitremer) were used, with a diameter of 2 mm and a thickness of 6 mm, distributed into groups: for the first group, 15 discs of ionomer with a resin composition were treated with 0.05 ml of 1.23% fluoride from a commercial brand (Maquira); for the second group, 15 discs of ionomer with a resin composition were treated with 0.05 ml of 2% fluoride from a commercial brand (Maquira), and both groups were treated with fluoride for 4 minutes, followed by washing and drying. The third group consisted of 15 discs of ionomer with resin composition to which no fluoride was applied. The results of the Tukey HSD multiple comparison test showed a statistically significant difference (p=0.000) between the resistance of the acidulated phosphate fluoride group at 1.23% (mean=21.36360 Kg/mm²) and the control group (mean=25.36360 Kg/mm²). In conclusion, the average resistance of the fluoride group at 1.23% concentration and the fluoride group at 2% concentration did not show statistically significant differences (p=0.198).
Acceso abierto
Evaluation of the concentration of fluoride in table water marketed in Lima – Peru 2021
(Universidad Privada Norbert Wiener, 2021-12-09) Marroquin Acero, Evelin Rubali; Hamamoto Ichikawa, Jessica María
The objective of this study was to determine the fluoride concentration in bottled water sold in Lima, Peru, using a deductive and hypothetical method, with a quantitative approach and an observational, prospective, and cross-sectional design. Methodology: The sample consisted of three batches of bottled water from the following brands: San Mateo, San Luis, and Cielo, where the fluoride concentration was measured with a potentiometric instrument using the Ion Plus Sure-Flow Fluoride Electrode 9609BNWP, Thermo-Orion, coupled with the Multiparametric VERSA STAR VSTAR-40A2, Thermo-Orion for reading. The results showed that the average fluoride concentration in San Luis bottled water was 0.0126 ppm, in San Mateo it was 0.1840 ppm, and in Cielo bottled water, it was 0.1268 ppm. The study concluded that the analyzed bottled waters did not contain adequate levels of fluoride, and significant differences were found between San Luis and Cielo (p=0.016), San Luis and San Mateo (p=0.000), and Cielo and San Mateo (p=0.016). San Mateo had the highest fluoride concentration, while San Luis had the lowest. Furthermore, the bottled water brands studied did not meet the optimal fluoride levels of 0.7 ppm F recommended by the American Association of Drugless Practitioners (AADP).