Visual evaluation of in vitro cariostatic effect of restorative materials associated with dentifrices

Abstract

This study evaluated in vitro the cariostatic effect of 6 restorative materials with and without fluoride release (Fuji II LC, F-2000, Degufil Mineral, Sure Fil and Z-250) associated with a fluoridated and a non-fluoridated dentifrice (Sensodyne Original Formula and Sensodyne Sodium Bicarbonate), on human enamel. Class V-like cavities were prepared on 240 enamel slabs, assigned to 12 groups (6 materials and 2 dentifrices). After cavity restoration, the slabs were submitted to a thermocycling regimen of 1000 thermal cycles and demineralization/remineralization cycles. During pH cycles, slurries of fluoridated and non-fluoridated dentifrices were applied for 5 min. Formation of artificial caries-like lesions was scored independently and blindly by 5 calibrated examiners according to an ordinal scale ranked 0 to 3 by visual examination. The results were analyzed statistically by the Kruskal-Wallis test and pair-wise comparisons (alpha=0.05). There were no significant differences (p>0.05) among the restorative materials associated with the fluoridated dentifrice. When used in association with the non-fluoridated dentifrice, Ketac-Fil showed the highest cariostatic effect followed by Fuji II LC and the other materials. Ketac-Fil was the only material that did not differ statistically when combined with either the fluoridated or the non-fluoridated dentifrice. In conclusion, under the tested experimental conditions, the association of restorative materials and fluoridated dentifrice yielded higher cariostatic effect, except for the conventional glass ionomer cement, whose cariostatic effect was not influenced by the type of dentifrice.

Antibacterial Activity of Various Self-etching Adhesive Systems Against Oral Streptococci

“…However, in the current study, fluoride might have played a role in the antibacterial effect of One-up Bond F Plus, since it had not been photo-activated during the assay, and the antibacterial effect was similar to chlorhexidine except for S mutans. [13][14]25 Except for the presence of the MDPB monomer, the composition of Clearfil SE Bond and Clearfil Protect Bond are very similar. No significant differences were observed with regard to the inhibition of bacterial growth for S oralis and S cricetus species.…”

“…[11][12] This effect can be achieved by incorporation of antimicrobial agents, such as glutaraldehydes, fluorides or antibacterial monomers in the adhesive systems' formulation. 9,[11][12][13][14][15] Generally, adhesive monomers of self-etching adhesive systems present a hydrophilic group at one end of the molecule, which is usually an acid, such as hydrogen phosphate or carboxylate. These traits provide these materials with a low pH and possibly some antibacterial properties.…”

Avaliação da Liberação de Íon Fluoreto de Cimentos Ionoméricos Antes e Após a Recarga e com Proteção da Superfície

“…Outro ponto que deve ser ressaltado é que mais porosidades levam a uma maior facilidade de recarga e, consequentemente, a uma maior liberação de íons fluoreto após sua recarga 14 . Quando os íons fluoreto são liberados de forma constante no meio bucal, tem se mostrado mais eficiente do que em apenas uma aplicação 21 . Quando comparada a 1ª com a 2ª etapa deste trabalho, todos os materiais apresentaram diferença estatisticamente significante no que diz respeito à capacidade de recarga do íon fluoreto em todos os dias de leitura, exceto no dia 2 para o Vidrion R e para o VitroFil LC.…”

“…Quando os CIVs anidros apresentam uma maior liberação de íon fluoreto antes da recarga, apresentam também uma maior capacidade de recarga 17 ; uma maior liberação da concentração de íon fluoreto nos CIVs anidros do que nos modificados por resina composta 5,7 . Os CIVs podem ser recarregados com íons fluoreto 6,7,14,17,21,22 através da propriedade de sinérese e embebição 10 , a partir da absorção de íon fluoreto provenientes do uso tópico em forma de gel 6,14; de dentrifícios fluoretados 7,21 ; de soluções para bochecho 7,23 e de alimentos 9 . Na 2ª etapa desta pesquisa, todos os CIVs DISCUSSÃO testados foram capazes de recarregar e novamente liberar íon fluoreto; e os CIVs anidros quando submetidos à recarga foram melhor recarregados do que os CIVs modificados por resina composta.…”

Efeitos de um cimento de ionômero de vidro e de um selante resinoso em esmalte bovino desmineralizado, submetido ou não a desafio cariogênico - estudo ‘in situ’

“…Entretanto, tem a capacidade de liberar e reincorporar flúor, sendo capaz de diminuir a desmineralização e auxiliar na remineralização do esmalte, mesmo em situações de alto desafio cariogênico provocado in vitro 18,28,37,38,51,69,73,74,77 e in situ 4,46,86,98 .…”