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Search Results: 1 - 10 of 49673 matches for " Marília Afonso Rabelo;Pessan "
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Fluoride content of UHT milks commercially available in Bauru, Brazil
Buzalaf, Marília Afonso Rabelo;Pessan, Juliano Pelim;Fukushima, Rejane;Dias, Andréia;Rosa, Helena Maria;
Journal of Applied Oral Science , 2006, DOI: 10.1590/S1678-77572006000100008
Abstract: objectives: the aims of the present study were to evaluate the fluoride (f) concentrations in whole, defatted and chocolate milks commercially available in brazil and to estimate the daily f intake from these sources. material and methods: f concentrations were determined for 23 brands of milks, after hmds-facilitated diffusion, using a f ion-specific electrode. possible f ingestion per kg body weight was estimated, based on suggested volumes of formula consumption, for infants aging 1 to 12 months. results: f concentrations ranged from 0.02 to 1.6 μg/ml f for all brands analyzed. whole and defatted milks had the lowest f concentrations, ranging from 0.02 to 0.07 μg/ml. with respect to chocolate milks, three brands had f concentrations above 0.5 μg/ml. some brands of chocolate milks exceeded the dose regarded as the threshold level for the development of dental fluorosis, without taking into account other sources of fluoride intake. conclusion: the high fluoride concentrations found in some brands of chocolate milks in the present study indicate that many products may be important contributors to the total fluoride intake, reinforcing the need of assaying fluoride content of foods and beverages consumed by small children.
Slow-release fluoride devices: a literature review
Pessan, Juliano Pelim;Al-Ibrahim, Nahla Saleh;Buzalaf, Marília Afonso Rabelo;Toumba, Kyriacos Jack;
Journal of Applied Oral Science , 2008, DOI: 10.1590/S1678-77572008000400003
Abstract: although the prevalence of caries has decreased dramatically over the past decades, it has become a polarised disease, with most of subjects presenting low caries levels and few individuals accounting for most of the caries affected surfaces. thus it become evident for the need of clinical approaches directed at these high-risk patients, in order to overcome problems related to compliance and low attendance at dental care centres. slow-release fluoride devices were developed based on the inverse relationship existing between intra-oral fluoride levels and dental caries experience. the two main types of slow-release devices - copolymer membrane type and glass bead - are addressed in the present review. a substantial number of studies have demonstrated that these devices are effective in raising intra-oral f concentrations at levels able to reduce enamel solubility, resulting in a caries-protective effect. studies in animals and humans demonstrated that the use of these devices was able to also protect the occlusal surfaces, not normally protected by conventional fluoride regimens. however, retention rates have been shown to be the main problem related to these devices and still requires further improvements. although the results of these studies are very promising, further randomised clinical trials are needed in order to validate the use of these devices in clinical practice. the concept of continuously providing low levels of intra-oral fluoride has great potential for caries prevention in high caries-risk groups.
Evaluation of the total fluoride intake of 4-7-year-old children from diet and dentifrice
Pessan, Juliano Pelim;Silva, Salete Moura Bonifácio da;Buzalaf, Marília Afonso Rabelo;
Journal of Applied Oral Science , 2003, DOI: 10.1590/S1678-77572003000200012
Abstract: this study measured the total daily fluoride (f) intake of 21 children, living in bauru, a fluoridated community. f intake from diet (d) and dentifrice (b) was determined for 2 groups of children: a (4-5-year-old) and b (6-7-year-old). the method of 24-hour duplicate diet was used. f ingested from dentifrice was indirectly obtained, subtracting the amount expelled and the amount left on the toothbrush from the amount initially loaded onto the brush. f analysis was carried out with the ion specific electrode (orion 9409), after hexamethyldisiloxane-facilitated diffusion. the amount of f intake from d and b was divided by the child weight and total intake (t) was calculated by adding d and b. data were analyzed by student?s "t" (p<0.05) test and by linear regression. results (mean ± sd, mg f/kg body weigh) of t, d and b were, respectively: 0.056±0.040; 0.018±0.12; 0.037±0.038 for all children; 0.055±0.026; 0.021±0.014; 0.034±0.027 for group a and 0.057±0.052; 0.016±0.010; 0.041±0.046 for group b. there was a strong positive correlation between the amount of dentifrice used and the amount of fluoride ingested (r = 0.92, p<0.0001). one-third of the children analyzed were exposed to a f dose above 0.07 mg / kg body weight, which is recommended as the upper limit of daily f intake. dentifrice was the main source of f ingested by children with percentages of 57.43 ± 29.02 for all children; 56.49 ± 31.82 for group a; and 58.29 ± 27.78 for group b. no significant differences were found between the 2 groups.
Fluoride intake from regular and low fluoride dentifrices by 2-3-year-old children: influence of the dentifrice flavor
Moraes, Samanta Mascarenhas;Pessan, Juliano Pelim;Ramires, Irene;Buzalaf, Marília Afonso Rabelo;
Brazilian Oral Research , 2007, DOI: 10.1590/S1806-83242007000300008
Abstract: this study evaluated the fluoride intake from dentifrices with different fluoride concentrations ([f]) by children aged 24-36 months, as well as the influence of the dentifrice flavor in the amount of fluoride ingested during toothbrushing. thirty-three children were randomly divided into 3 groups, according to the [f] in the dentifrices: g-a (523 μgf/g), g-b (1,062 μgf/g) and g-c (1,373 μgf/g). dentifrices a and b are marketed for children, while dentifrice c is a regular product. the amount of f ingested was indirectly obtained, subtracting the amount expelled and the amount left on the toothbrush from the amount initially loaded onto the brush. the results were analyzed by anova, tukey's test and linear regression analysis (p < 0.05). children ingested around 60% of the dentifrice loaded onto the brush, but no significant differences were seen among the groups (p > 0.05). mean daily fluoride intake from dentifrice for g-a, g-b and g-c was 0.022a, 0.032a and 0.061b mg f/kg body weight, respectively (p < 0.01). there was a strong positive correlation (r = 0.86, p < 0.0001) between the amount of dentifrice used and the amount of fluoride ingested during toothbrushing. the results indicate the need for instructing children's parents and care givers to use a small amount of dentifrice (< 0.3 g) to avoid excessive ingestion of fluoride. the use of low-[f] dentifrices by children younger than 6 years also seems to be a good alternative to minimize fluoride intake. dentifrice flavor did not influence the percentage of fluoride intake.
Fluoride concentrations in industrialized beverages consumed by children in the city of Bauru, Brazil
Lodi, Carolina Simonetti;Ramires, Irene;Pessan, Juliano Pelim;Neves, Lucimara Teixeira das;Buzalaf, Marília Afonso Rabelo;
Journal of Applied Oral Science , 2007, DOI: 10.1590/S1678-77572007000300010
Abstract: the increasing consumption of juices, soft drinks and teas among children has increased significantly fluoride ingestion at the age range of risk for development of dental fluorosis. objective: the purpose of this study was to evaluate fluoride concentrations in some brands of industrialized beverages consumed by children in the city of bauru, sp, brazil. material and methods: 98 brands of beverages were analyzed, divided into 3 lots, comprising 36, 32 and 30 brands, respectively, for the first, second and third lots. fluoride concentrations were determined by hmds-facilitated diffusion, using a fluoride ion-specific electrode (orion 9409). results: fluoride concentrations ranged between 0.04 and 1.76 μg f/ml. it was observed a wide variation in fluoride concentrations among the different brands, as well as the different lots of the same brand. there was no information on fluoride concentrations on the labels of any product. conclusions: some of the products analyzed could contribute significantly to the total fluoride intake and, thus, be important risk factors for development of dental fluorosis, which indicates the need of controlling the production of these beverages with respect to fluoride concentration.
In vitro assessment of an experimental coat applied over fluoride varnishes
Delbem, Alberto Carlos Botazzo;Brighenti, Fernanda Louren??o;Oliveira, Felipe Alberto Lino;Pessan, Juliano Pelin;Buzalaf, Marília Afonso Rabelo;Sassaki, Kikue Takebayashi;
Journal of Applied Oral Science , 2009, DOI: 10.1590/S1678-77572009000400003
Abstract: objective: the time of contact between the product and enamel surface is important in ensuring the efficacy of fluoride varnishes. thus, some alternatives could avoid fluoride loss to saliva and improve the anticariogenic action of the product. this study evaluated the effect of an experimental coat on the anticariogenic action of fluoride varnishes. material and methods: enamel bovine blocks were selected by evaluating surface microhardness and randomized into five groups (n=24): placebo, duraphattm, duraphattm with coat, duofluoridtm and duofluoridtm with coat. twelve blocks from each group were used to analyze calcium fluoride (caf2) formed on enamel after treatment. the other 12 blocks were subjected to ph cycling for 7 days. the varnishes were kept on enamel for 6 h. next, the percentage change of surface microhardness (%smhc) and mineral loss (δz) were calculated. caf2 retained and fluoride present in the ph-cycled solutions were also measured. results: the use of the coat did not decrease %smhc and δz, but all fluoride varnishes had better results when compared to the placebo (anova and kruskal-wallis, respectively). the values from caf2 formed were higher compared to the values of caf2 retained (non-paired t test, p<0.05). there was a trend to decrease the amount of f in the solutions at the end of ph cycling (kruskal-wallis, p<0.05). conclusions: although the experimental coat increased the formation of caf2 on the enamel surface, it did not significantly improve the anticariogenic action of fluoride varnishes.
Fluoridation of the public water supply and prevalence of dental fluorosis in a peripheral district of the municipality of Bauru, SP
Ramires, Irene;Olympio, Kelly Polido Kaneshiro;Maria, Andréa Gutierrez;Pessan, Juliano Pelim;Cardoso, Vanessa Eid Silva;Lodi, Carolina Simonetti;Buzalaf, Marília Afonso Rabelo;
Journal of Applied Oral Science , 2006, DOI: 10.1590/S1678-77572006000200013
Abstract: objectives: the objectives of this study were to assess the fluoride concentration in the public water supply and the prevalence of dental fluorosis in schoolchildren between 7 and 15 years old, living in a peripheral district of the municipality of bauru. material and methods: for this, fifty two water samples were collected on three different days of one week. these samples were analyzed for fluoride by means of the ion-sensitive electrode method (orion 9609) coupled to a potentiometer (procyon, model 720). in this method, 1.0 ml of tisab ii (orion) was added to 1.0 ml of the sample. for the epidemiological survey of fluorosis, 52 schoolchildren of both genders, aged between 7 and 15 were assessed, with prior authorization from their caretakers. only one person examined the children, after supervised toothbrushing and drying with cotton wool rolls. the tf index was used. results: the fluoride concentrations in the water samples ranged from 0.62 to 1.20 mg/l, with a mean of 0.9 mg/l. the prevalence of dental fluorosis was 33%, with severity ranging from tf1 to tf4 (kappa of 0.73 and concordance of 83.33%). conclusions: the results from the analysis of water samples indicated a fluoride concentration greater than recommended for bauru. the fluorosis levels found were higher than expected for a peripheral district, in which water is one of the few sources of fluoride.
Urinary fluoride output in children following the use of a dual-fluoride varnish formulation
Olympio, Kelly Polido Kaneshiro;Cardoso, Vanessa Eid da Silva;Bijella, Maria Fernanda Borro;Pessan, Juliano Pelim;Delbem, Alberto Carlos Botazzo;Buzalaf, Marília Afonso Rabelo;
Journal of Applied Oral Science , 2009, DOI: 10.1590/S1678-77572009000300009
Abstract: objective: this study evaluated the bioavailability of fluoride after topical application of a dual-fluoride varnish commercially available in brazil, when compared to duraphattm. material and methods: the urinary fluoride output was evaluated in seven 5-year-old children after application of the fluoride varnishes, in two different phases. in the first phase (i), children received topical application of the fluoride varnish duofluorid xii (2.92% fluorine, calcium fluoride + 2.71% fluorine, sodium fluoride, fgmtm). after 1-month interval (phase ii), the same amount (0.2 ml) of the fluoride varnish duraphat (2.26% fluorine, sodium fluoride, colgatetm) was applied. before each application all the volunteers brushed their teeth with placebo dentifrice for 7 days. urinary collections were carried out 24 h prior up to 48 h after the applications. fluoride intake from the diet was also estimated. fluoride concentration in diet samples and urine was analyzed with the fluoride ion-specific electrode and a miniature calomel reference electrode coupled to a potentiometer. data were tested by anova and tukey's post hoc test (p<0.05). results: there were significant differences in the urinary fluoride output between phases i and ii. the use of duofluorid xii did not significantly increase the urinary fluoride output, when compared to baseline levels. the application of duraphat caused a transitory increase in the urinary fluoride output, returning to baseline levels 48 h after its use. conclusions: the tested varnish formulation, which has been shown to be effective in in vitro studies, also can be considered safe.
Concentra??o de flúor em águas engarrafadas comercializadas no município de S?o Paulo
Grec,Roberto Henrique da Costa; Moura,Patrícia Garcia de; Pessan,Juliano Pelim; Ramires,Irene; Costa,Beatriz; Buzalaf,Marília Afonso Rabelo;
Revista de Saúde Pública , 2008, DOI: 10.1590/S0034-89102008000100022
Abstract: the objective of the study was to evaluate the fluoride concentration in bottled water available on the market, in comparison with the values printed on the bottle label. two hundred and twenty-nine water samples were collected from 35 brands available in several supermarkets, grocery stores and snack bars with high turnover in different regions of the municipality of s?o paulo, southeastern brazil, in 2006. fluoride concentrations were determined by duplicate analysis using an ion-specific electrode. the fluoride concentrations ranged from 0.01 to 2.04 mg/l, with significant differences between the values stipulated on labels and those found in the analyses. these results emphasize the importance of controls over fluoride levels in bottled water enforced by the sanitary surveillance agency.
Prevalence of dental fluorosis in Bauru, S?o Paulo, Brazil
Ramires, Irene;Pessan, Juliano Pelim;Levy, Flávia Mauad;Rodrigues, Maria Heloísa Correia;Almeida, Beatriz Sim?es de;Kato, Melissa Thiemi;Sales Peres, Silvia Helena de Carvalho;Buzalaf, Marília Afonso Rabelo;
Journal of Applied Oral Science , 2007, DOI: 10.1590/S1678-77572007000200013
Abstract: objective: to evaluate the prevalence of dental fluorosis in scholars aging 12 to 15 years old, residents in the city of bauru, state of s?o paulo, brazil. methods: 1318 volunteers were enrolled in this study and examined in 18 public schools of the state of s?o paulo. the examinations were performed in the schools' court by three dentists (with a master's degree in public health), after toothbrushing supervised by another dentist. the teeth were dried with cotton pellets and examined under natural light by visual inspection, using an explorer as recommended by the who, a plane mirror and a tongue depressor. the thylstrup-fejerskov (tf) index was used for rating fluorosis. intra and inter-examiner reproducibility was calculated and data were submitted to descriptive analysis. results: approximately 36% of the children presented dental fluorosis, of which 28% was diagnosed as tf1 while the remaining received scores between tf2 and tf4. conclusion: the prevalence of dental fluorosis in bauru is within the expected range, based on previous studies. although fluoride is an important resource for caries control, its use must be adequate to the needs of each specific population.
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