Examinando por Materia "Concentración de flúor"

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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).