RESUMO
Penetration of a liquid adhesive into human artificial and natural white spots, both acid-conditioned and nonconditioned, was studied. All artificial white spots showed penetration of the adhesive. Acid-conditioned natural lesions exhibited penetration to a lesser amount than in vitro lesions. Penetration in nonconditioned natural lesions was not apparent.
Assuntos
Cárie Dentária/metabolismo , Esmalte Dentário/metabolismo , Materiais Dentários , Selantes de Fossas e Fissuras , Adesividade , Cárie Dentária/patologia , Esmalte Dentário/efeitos dos fármacos , Esmalte Dentário/ultraestrutura , Humanos , Ácidos Fosfóricos/farmacologia , Propriedades de SuperfícieRESUMO
The degrees of marginal leakage was tested for different restorative techniques with use of both ultraviolet-polymerized and cold-curing resins. All the materials tested showed severe marginal leakage when applied as conventional butt joint restorations. When the restorations were extended onto peripheral etched enamel, either with or without a sealant-primed etched surface, marginal leakage was prevented in most instances with both the cold-curing and ultraviolet-polymerized materials. However, the ultraviolet-polymerized sealant was more effective in preventing marginal leakage than the cold-curing sealants when applied as a covering over the restorations and extended onto the peripheral etched enamel.