Objectives: An in vitro study which was assessed by testing the appropriate microfiltration protocol using a conventional ionomer cement with sandwich technique in Black’s cavities class I. Methods: 60 human premolars, which underwent standardized cavities. These were randomly divided into 4 groups of 15 teeth each: G1 had IVC Ketac Molar Easymix and G3 had Ionofil Plus respectively to the edge of the cavity and then to wear them in 24 hours, leaving 1mm cavity base and subsequently using phosphoric acid on both enamel and dentin. In G2 and G4 both were simultaneously conditioned with polyacrylic on dentin and phosphoric acid on enamel, followed by washing, drying and 1mm placement of IVC Ionofil Plus and Ketac Molar Easymix respectively. All groups received two layers of adhesive OneCoat S Bond Coltene, light cured for 30 seconds, finally Brillant Coltene resin was applied in an incre...

Objectives: Our aim was to determine the prevalence of fluorosis among the population of children who live in Tumbaco Valley, Quito, Ecuador. We sought to establish its relation to the concentration of fluoride in the water supply of this área. Material and methods: The sample was 62 children who were selected based upon previously defined inclusion and exclusion criteria. All of the children were clinically examined; a photographic record of upper anterior teeth surfaces was performed. Results: The analyzed data showed that only 23,3% of the children surveyed had rates of dental fluorosis, with TF-2 being the most common. Chemical analysis of water from the supply source showed the presence of fluoride in very small amounts which did not exceed 0,32 mg/L. Conclusions: The low presence of fluoride in the examined water sources explains the absence of fluorosis in the assessed population...