1,720,956 research outputs found
pH values of fluoride mouthwashes marketed in Peru: an observational study
No full textThe objective of this research was to determine the average pH value of fluoride mouthwashes marketed in Peru. The methodological design was experimental-descriptive. Seven commercial brands were evaluated, with a sample of 21 fluoride mouthwashes, three per group, Colgate Plax Ice Glacial Zero Alcohol, Colgate Plax Soft Mint Zero Alcohol, Listerine Total Care Zero, Listerine Anticaries, Oral B Complete, Dento Menta Zero Alcohol and Vitis Orthodontic; a previously calibrated digital pH meter was used to measure the pH and the data was processed with ANOVA and Tukey tests, finding statistically significant differences in the means of the pH values of the mouthwashes p=0. 000(p<0.05), these were considered acidic since they obtained values ranging from 3.93 to 6.27, of which 6 of the brands evaluated obtained values below the critical pH=5.5 considered potentially erosive for the enamel, Listerine Anticaries was the most acidic with a pH=3.93 and Dento Menta Zero Alcohol the least acidic with a pH=6.27, being the only brand that was above the critical value. It is suggested that the pH value be expressed on the commercial label, and thus be taken into account when choosing the most appropriate mouthwash according to the patient's needs, evaluating the benefit/side effect
Fluoride Mouthwashes and Their Effect on Oral Health
No full textOral health was recognised as an essential component of general well-being, and fluoridated mouthwashes represented an effective alternative in the prevention of diseases such as caries and gingivitis. Throughout the study, it was observed that their effectiveness depended not only on the presence of fluoride, but also on physicochemical variables such as pH, viscosity and titratable acidity. Research conducted by Marinho et al. and Van der Kaaij et al. demonstrated the preventive capacity of fluoride against carious lesions, especially in children and adolescents. However, studies such as those by Hanan et al. and Lima et al. revealed that many commercial brands had pH values below 5.5, considered potentially erosive to tooth enamel. Alcohol content was also a controversial factor. While Fernández identified that its presence tended to reduce pH, Marchetti et al. showed that alcohol-free formulations maintained similar efficacy and were safer for certain groups. The importance of transparency in labelling was also highlighted, especially in products aimed at children, as indicated by Alves et al. Finally, it was concluded that, although fluoridated mouthwashes provided proven benefits, their use should be carefully evaluated, considering both their formulation and their potential impact on public health
pH values of fluoride mouthwashes marketed in Peru: an observational study
No full textThe objective of this research was to determine the average pH value of fluoride mouthwashes marketed in Peru. The methodological design was experimental-descriptive. Seven commercial brands were evaluated, with a sample of 21 fluoride mouthwashes, three per group, Colgate Plax Ice Glacial Zero Alcohol, Colgate Plax Soft Mint Zero Alcohol, Listerine Total Care Zero, Listerine Anticaries, Oral B Complete, Dento Menta Zero Alcohol and Vitis Orthodontic; a previously calibrated digital pH meter was used to measure the pH and the data was processed with ANOVA and Tukey tests, finding statistically significant differences in the means of the pH values of the mouthwashes p=0. 000(p<0.05), these were considered acidic since they obtained values ranging from 3.93 to 6.27, of which 6 of the brands evaluated obtained values below the critical pH=5.5 considered potentially erosive for the enamel, Listerine Anticaries was the most acidic with a pH=3.93 and Dento Menta Zero Alcohol the least acidic with a pH=6.27, being the only brand that was above the critical value. It is suggested that the pH value be expressed on the commercial label, and thus be taken into account when choosing the most appropriate mouthwash according to the patient\u27s needs, evaluating the benefit/side effect
Fluoride Mouthwashes and Their Effect on Oral Health
No full textOral health was recognised as an essential component of general well-being, and fluoridated mouthwashes represented an effective alternative in the prevention of diseases such as caries and gingivitis. Throughout the study, it was observed that their effectiveness depended not only on the presence of fluoride, but also on physicochemical variables such as pH, viscosity and titratable acidity. Research conducted by Marinho et al. and Van der Kaaij et al. demonstrated the preventive capacity of fluoride against carious lesions, especially in children and adolescents. However, studies such as those by Hanan et al. and Lima et al. revealed that many commercial brands had pH values below 5.5, considered potentially erosive to tooth enamel. Alcohol content was also a controversial factor. While Fernández identified that its presence tended to reduce pH, Marchetti et al. showed that alcohol-free formulations maintained similar efficacy and were safer for certain groups. The importance of transparency in labelling was also highlighted, especially in products aimed at children, as indicated by Alves et al. Finally, it was concluded that, although fluoridated mouthwashes provided proven benefits, their use should be carefully evaluated, considering both their formulation and their potential impact on public health
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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