Resumen
l propósito de este estudio es evaluar si la aplicación de una tercera capa de adhesivo tiene algún efecto en la fuerza de adhesión de un adhesivo dentinal a la dentina. 30 piezas extraídas fueron cortadas y embebidas en acrílico, la dentina media fue expuesta con lija de SiC de grano 600; luego se aplicaron los adhesivos: Prime&Bond NT, SingleBond 2 y Excite. Un grupo (n=5) recibió dos capas de adhesivo, tal y como indica el fabricante, y el otro tres capas. Las muestras fueron probadas en cizalla luego de ser almacenadas 7 días en agua a 37º C, a una velocidad de 1 mm/min. Los resultados en MPa fueron: PBNT 2 capas: 19.3; PBNT 3 capas: 32.6; SB2, 2 capas: 32.1; SB2, 3 capas: 38.2; EXC 2 capas: 38.2; EXC 3 capas: 44.7. Así se concluye que una tercera capa de los adhesivos probados en este estudio, aumentan su fuerza de adhesión a dentina
Citas
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