Cross Sectional Microhardness
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. Remineralizing effect of commercial fluoride varnishes on artificial enamel lesions
Abstract: The aim of this study was to evaluate soluble and insoluble fluoride concentrations in commercial varnishes, and their remineralization effect on artificial caries enamel lesions using surface and cross-sectional microhardness evaluations. Forty bovine enamel blocks were separated into four groups (n=10): control (no treatment), Enamelast (Ultraden
Braz. oral res.. Publicado em: 27/05/2019
-
2. Effects of experimental bleaching agents on the mineral content of sound and demineralized enamels
Abstract High concentrations of hydrogen peroxide can cause adverse effects on composition and structure of teeth. However, the addition of calcium and fluoride in bleaching agents may reduce enamel demineralization. Objective: To evaluate chemical changes of sound and demineralized enamels submitted to high concentrations of hydrogen peroxide containing fl
J. Appl. Oral Sci.. Publicado em: 04/10/2018
-
3. Effect of erosive challenges on deciduous teeth undergoing restorative procedures with different adhesive protocols - an in vitro study
ABSTRACT Objective: To evaluate the effect of erosive challenges on the tooth- restoration interface of deciduous teeth treated with different adhesive protocols. Material and Methods: Deciduous molars were cut mesiodistally, then embedded, abraded and polished (n=80). Samples were randomly divided according to the adhesive system used into: G1 (Adper Sing
J. Appl. Oral Sci.. Publicado em: 18/01/2018
-
4. 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 (experimental varnish), 5% sodium fluoride (NaF) varnish
Braz. oral res.. Publicado em: 06/11/2017
-
5. Effectiveness of plant-derived proanthocyanidins on demineralization on enamel and dentin under artificial cariogenic challenge
Dental caries is considered a disease of high prevalence and a constant problem in public health. Proanthocyanidins (PAs) are substances that have been the target of recent studies aiming to control or treat caries. Objective The aim of this in vitro study was to evaluate the efficacy of a treatment with grape seed extract, under cariogenic challenge, to min
J. Appl. Oral Sci.. Publicado em: 2015-06
-
6. Impact of chemical agents for surface treatments on microhardness and flexural strength of root dentin
This study assessed the cross-sectional Knoop microhardness and flexural strength of root dentin exposed to different surface treatments with chemical agents after biomechanical preparation. Root canals from human canines were biomechanically treated and divided into eight groups (n=10) to receive one of the following dentin treatments: I. Deionized water (c
Braz. oral res.. Publicado em: 15/09/2014
-
7. Performance of digital radiography with enhancement filters for the diagnosis of proximal caries
Enhancement filters are potentially supposed to improve the diagnostic performance of digital images. Thus, the aim of this study was to compare the performance of digital radiography with and without enhancement filters for the detection of induced proximal caries lesions. The total sample consisted of 120 sound human teeth (40 premolars, 80 molars). Enamel
Braz. oral res.. Publicado em: 2013-06
-
8. Dentine microhardness after different methods for detection and removal of carious dentine tissue
There are several methods for identifying carious dentinal tissue aiming to avoid removal of healthy dentinal tissue. OBJECTIVES: The purpose of this study was to test different methods for the detection of carious dentinal tissue regarding the amount of carious tissue removed and the remaining dentin microhardness after caries removal. MATERIAL AND METHODS:
J. Appl. Oral Sci.. Publicado em: 2012-08
-
9. In situ anticariogenic effect of conventional glass ionomer cement by dentrifice dependence / Efeito anticariogênico de cimento de ionômero de vidro convencional pela dependência de dentrifício: estudo "in situ"
The aim of this study was to assess in situ anticaries potential of conventional glass ionomer cement (GIC) to prevent enamel and dentine demineralization either alone or in combination with a fluoride (F) regimen. A randomized, blind, crossover design for caries induction was carried out in 2 phases of 14 days each. This study was a 2 x 2 cross-over factori
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
-
10. AvaliaÃÃo in situ da influÃncia da utilizaÃÃo de diferentes sistemas adesivos no desenvolvimento da cÃrie secundÃria em esmalte / In situ evaluation of secondary caries inhibition promoted by self-etch adhesive systems containing antibacterial agents
Contemporary adhesives systems present satisfactory bonding to enamel and dentin. However, replacement of the restorations due to secondary caries formation is still a major problem and of great concern in Dentistry. Thus, this study assessed in situ the effects of adhesive systems containing or not fluoride and/or the antibacterial monomer 12-methacryloylox
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2008
-
11. Effects of bleaching agents of high concentration for treatment in office in microhardness, morphology and chemical composition of human enamel / Efeitos de agentes clareadores de alta concentração para tratamento em consultorio na microdureza, morfologia e composição quimica do esmalte humano
Several studies have been concerned with the adverse effects produced by home applied and in-office bleaching treatments. The aim of this study is to evaluate the effects of highconcentrated bleaching agents (35% hydrogen peroxide) on human enamel microhardness, chemical and structural composition. Sixty and five human third molars human were used. Two ename
Publicado em: 2007
-
12. Influence of different formulations of bleaching agents on enamel and dentin physical and chemical properties / Influencia de diferentes formulações de agentes clareadores nas propriedades fisicas e quimicas do esmalte e dentina
Section A: Effects of bleaching agents on dental enamel Since the introduction of the nightguard vital bleaching technique using 10% carbamide peroxide (10% CP), reports have evaluated the effects of bleaching agents on human enamel. Evidences show that CP is able to alter the composition and morphology of enamel substrate. In order to reduce the adverse eff
Publicado em: 2007