Results: 3070

Anticariogenic activity of the active fraction from isertia laevis against S. mutans and S. sobrinus: comparison of two extraction methods

Acta odontol. latinoam; 23 (3), 2010
Dental caries is considered a multi-factorial, infectious, chronic, localized, post-eruptive, transmissible disease that leads to the destruction of dental hard tissue. The recognition of Streptococcus mutans as the major bacterial species involved in dental caries has led to the implementation of preven...

Hydrophobicity test in mutans Streptococci

Acta odontol. latinoam; 23 (3), 2010
Kinetic hydrophobic measurements were performed by confronting 40 mutans streptococci from thirty 10- to 20-year-old patients with 200 ml hexadecane (Sigma). Fourteen patients had high dental caries risk (Group A), dmft + DMFT >5 with 3 or more active caries, and 16 had low dental caries risk (Group B...

Effect of endodontic sealer and resin luting strategies on pull-out bond strength of glass fiber posts to dentin

Acta odontol. latinoam; 23 (3), 2010
The aim of this study was to evaluate the influence of eugenolcontaining endodontic sealers and luting strategy on the pull-out bond strength of glass fiber posts to dentin. Sixty-four bovine incisors were randomly assigned into two groups of 32 specimens each for obturation procedure with gutta-percha o...

A preliminary study of enamel remineralization by dentifrices based on RecaldentTM (CPP-ACP) and NovaMin® (calcium-sodium-phosphosilicate)

Acta odontol. latinoam; 23 (3), 2010
The purpose of this study was to investigate the enamel remineralization potential of two toothpastes, one of which was based on RecaldentTM (CPP- ACP) and the other on NovaMin® (Calcium-sodium-phosphosilicate). Human permanent molar teeth were subjected to three consecutive demineralization cycles. The...

Effect of bleaching agent on dental ceramics roughness

Acta odontol. latinoam; 23 (3), 2010
The aim of this study was to assess the effect of bleaching agents (10% and 16% carbamide peroxide) on the roughness of two dental ceramics in vitro, and to analyze the surface by scanning electronic microscopy (SEM). Two bleaching agents (10% and 16% / Whiteness, FGM Gel) and two microparticle feldspath...

Chemical constituents from the stem of Brosimum potabile (Moraceae)

Acta amaz; 40 (4), 2010
Three coumarins, 5-methoxypsoralene, xanthyletin, and (-)-marmesin, have been isolated from the ethanolic extract of the stem of the Amazonian plant Brosimum potabile. The structures were determined on the basis of NMR analyses and by comparison with spectroscopic data in the literature. The analysis of ...

Ação inseticida do extrato de Derris amazonica Killip para Cerotoma arcuatus Olivier (Coleoptera: Chrysomelidae)

Acta amaz; 40 (4), 2010
A abundância e o potencial inseticida de Derris amazonica e a necessidade de controle de Cerotoma arcuatus Olivier (Coleoptera: Chrysomelidae) na cultura do feijão-caupi (Vigna unguiculata L. Walp) estimularam a realização desta pesquisa, que objetivou avaliar a ação inseticida do extrato de D. ama...

Isomerização do óleo essencial de pimenta-longa (Piper hispidinervium C. DC) para a obtenção de isosafrol

Acta amaz; 40 (4), 2010
As piperáceas brasileiras apresentam propriedades para serem utilizadas, entre outras aplicações, como inseticidas e antifúngicos. Dentre as piperáceas, pode-se citar a Piper hispidinervum C. DC. De suas folhas e dos talos finos extrai-se um óleo essencial rico em safrol, que é utilizado pela ind...

Composição química e valor nutricional para grandes herbívoros das folhas e frutos de aninga (Montrichardia linifera, Araceae)

Acta amaz; 40 (4), 2010
Montrichardia linifera (Araceae), conhecida popularmente como 'aninga', faz parte dos ecossistemas de várzea da Amazônia e da dieta natural de animais como peixe-boi, tartarugas, peixes, búfalo e gado. Com o objetivo de contribuir para o conhecimento químico e valor nutricional da mesma, folhas e fru...

Recuperação completa da doença de Paget extramamária decorrente da vulva (DPEM r-V) após tratamento com Imiquimode

Apesar de rara, a doença de Paget extramamária recorrente da vulva (DPEMr-V) é uma condição grave porque, subjacente à malignidade interna, podem acompanhar lesões cutâneas superficiais. A doença de Paget extramamária é uma condição caracterizada por erupção cutânea crônica tipo eczema d...