Results: 46

Alterações morfológicas e químicas do esmalte humano após o clareamento dental: avaliação in situ

Introdução: A alteração de cor dos dentes apresenta-se como um dos fatores que mais concorrem para o desequilíbrio do sorriso, sendo o clareamento dental amplamente difundido e solicitado pelos pacientes. Objetivo: Este estudo in situ teve como objetivo avaliar as mudanças morfológicas e químicas...

In situ effect of titanium tetrafluoride varnish on enamel demineralization

Abstract The effect of a 4% titanium tetrafluoride (TiF 4 ) varnish on enamel demineralization was evaluated. Twelve volunteers participated in this double-blind, randomized crossover study. Six enamel specimens were positioned in intraoral appliances throughout four treatment stages: 4% TiF 4 varnish (e...

Influence of sediments and tungsten traces on the skeletal structure of Pseudodiploria: a reef building scleractinian coral from the Veracruz Reef System National Park, Mexico

Rev. biol. trop; 64 (3), 2016
Abstract:Coral reefs are under intense conditions of stress caused by the anthropogenic activities in coastal areas and the increase of human population. Water effluents from urban and industrial areas carry large amounts of sediments and pollutants affecting corals populations, inducing bioerosion, incr...

Characterisation and microleakage of a new hydrophilic fissure sealant - UltraSeal XT® hydro

J. appl. oral sci; 24 (4), 2016
ABSTRACT Objectives The aim of this study was to characterise the new hydrophilic fissure sealant, UltraSeal XT® hydro™ (Ultradent Products, USA), and to investigate its in vitro resistance to microleakage after placement on conventionally acid etched and sequentially lased and acid etched molar...

Evaluation of the remineralization capacity of CPP-ACP containing fluoride varnish by different quantitative methods

J. appl. oral sci; 24 (3), 2016
ABSTRACT Objective The aim of this study was to evaluate the efficacy of CPP-ACP containing fluoride varnish for remineralizing white spot lesions (WSLs) with four different quantitative methods. Material and Methods Four windows (3x3 mm) were created on the enamel surfaces of bovine incisor teeth. A...

Influence of irrigants in association with ultrasound for cleaning root dentin surface after post space preparation: EDS analysis

This study evaluated the cleanliness of post space after different irrigation protocols, associated or not to the use of ultrasound. Thirty-six single-rooted bovine roots were instrumented with rotary system, irrigated with 1 % hypochlorite and filled with Ah Plus sealer and gutta-percha cones. After sev...

Microbial-induced remediation of Zn2+ pollution based on the capture and utilization of carbon dioxide

Electron. j. biotechnol; 19 (1), 2016
Background: Microbial-induced remediation of Zn2+ pollution based on the capture and utilization of carbon dioxide was investigated. In this study, carbon dioxide was absorbed and transformed into carbonate ions under the enzymatic action of Paenibacillus mucilaginosus, which was being utilized to minera...

Avaliação in vitro de enxaguatórios experimentais com compostos bioativos na prevenção/remineralização de lesões de mancha branca ativa durante tratamento ortodôntico

O objetivo deste estudo foi avaliar in vitro por meio da Fluorescência de Raios X por Dispersão de Energia (XRF) e Microscopia Eletrônica de Varredura (MEV) o efeito remineralizante de enxaguatórios bucais com compostos bioativos, sendo nanopartículas de hidroxiapatita de cálcio (nanoHAp) associada...

The effect of standardised implantoplasty protocol on titanium surface roughness: an in-vitro study

Braz. oral res. (Online); 30 (1), 2016
Abstract: To analyse the changes of surface characteristics of machined and moderately roughened titanium disks following a standardised implantoplasty protocol. Forty titanium discs (machined: n = 20; moderately roughened: n = 20) were instrumented with one half of each disc maintained as the control (n...

Influência de características físicas e química dos materiais de abutments de implantes em zircônia e titânio na adesão e viabilidade de células epiteliais gengivais OBA-9

Dada à necessidade de uma efetiva barreira tecidual precoce ao redor dos implantes osseointegrados, o presente estudo avaliou, in vitro, a influência das características físicas e químicas de materiais simulando superfícies de abutments de implantes em titânio (T) e zircônia (ZrO2) na adesão de ...