Urinary fluoride output in children following the use of a dual-fluoride varnish formulation.

Objective: This study evaluated the bioavailability of fluoride after topical application of a dual-fluoride varnish commercially available in Brazil, when compared to Duraphat.

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.

Effect of calcium pre-rinse and fluoride dentifrice on enamel and on dental plaque formed in situ.

Purpose: The aim of this in situ double-blind randomised crossover study was to investigate the effect of calcium (Ca) pre-rinse on the composition of plaque and on enamel prior to the use of fluoride (F) dentifrice.

Materials And Methods: During four phases (14 days each) of this study, 10 volunteers had agreed to wear dental appliances containing two healthy bovine enamel blocks. A fresh solution containing 20% weight/volume (w/v) sucrose was dripped on the enamel blocks ex vivo for 5 min three times a day.

Fluoride ingestion from toothpaste and diet in 1- to 3-year-old Brazilian children.

Objective: This study estimated the total daily fluoride intake of 1- to 3-year-old children from diet and dentifrice. The constituents of the diet were divided into solids, water, milk, and other beverages, which were analyzed separately. The correlation between fingernail fluoride concentrations and the total daily fluoride intake by children was also investigated.

Availability of fluoride from meals given to kindergarten children in Brazil.

Objectives: The aim of this study was to evaluate the amount of fluoride supplied daily in the meals given in 44 public kindergarten schools in Bauru, Brazil. In addition, the fluoride concentration of water supplies and its impact on the amount of fluoride found in the meal samples were also investigated.

Methods: Meal samples and water were collected during 2 weeks (10 working days) in public kindergarten schools.

Bone surface and whole bone as biomarkers for acute fluoride exposure.

This study compares fluoride concentrations ([F]) in surface and whole bone for up to 27 days following an acute oral dose of F. Four groups of rats received single oral F dose (50 mg/kg body weight), and the control group received deionized water (n = 10/group). Groups were euthanized at 1, 3, 9, or 27 days after F administration.

Fluoride uptake in dental enamel after using fluoridated dentifrice, preceded or not by a CaCl(2) solution rinse.

Introduction: The use of a calcium solution previously to brushing could favor the remineralization and the fluoride (F) uptake in dental enamel.

Objective: This study evaluated the F in dental enamel after using a F dentifrice, preceded or not by a rinse with a CaCl(2) solution.

Methods: Ten subjects (18-30 years) participated in a double-blind, cross-over protocol.

Evaluation of total pH and soluble and ionic fluoride concentrations in dentifrices commercially available in Brazil.

Purpose: To verify the total (TF), soluble (SF) and ionic (IF) fluoride concentrations in the main Brazilian dentifrices for comparison and quality control according to the current Brazilian Ministry of Health Regulations, 2000.

Materials And Methods: Nineteen brands, from 2 batches, fresh or aged at 45 degrees C/48 h, had their F concentrations and pH analyzed with a specific electrode and pHmeter. To analyze the TF, 0.

Nail and bone surface as indicators of acute exposure to fluoride in rats.

This study evaluated the use of nails and bone surfaces as indicators of acute exposure to fluoride in rats. Six groups (n=10/grp), aged 70 days, received, by gastrogavage, single doses of sodium fluoride containing 10, 35, 45, 60, 75 and 90 mg fluoride/kg body weight. The control group received deionized water.

Fluorine content of several brands of chocolate bars and chocolate cookies found in Brazil.

Chocolate bars and chocolate cookies are foodstuffs highly appreciated by children. The possibility of having fluorine (F) among their components, associated with an excessive consumption, may make them decisive contributors to the total daily F intake. Thus, they could participate in the establishment of dental fluorosis.

Fluoride content of several breakfast cereals and snacks found in Brazil.

Breakfast cereals and snacks are foodstuffs highly appreciated by children, and the possibility that they contain substantial amounts of fluoride, associated with their widespread consume, may make them important contributors to the total daily fluoride intake. The aim of this study was to analyze the fluoride content on several breakfast cereals (A) and snacks (B) purchased in Brazil. The analysis were made after HMDS-facilitated diffusion (Taves) using the ion-specific electrode (9609).