Resumen
Objetivo: Evaluar el efecto de la incorporación de proantocianidina al 2% en ácido fosfórico al 10% sobre la fuerza de adhesión inmediata en dentina de sistemas adhesivos universales y convencionales. Métodos: Se seccionaron 40 molares humanos para exponer la dentina y se dividieron (n=10) según el protocolo adhesivo. G1 - ácido fosfórico (AF) al 35% y Adper Single Bond 2 (SB - 3M ESPE); G2 - AF al 10% + 2% de proantocianidina y SB; G3 - AF al 35% y Single Bond Universal (SBU - 3M ESPE); y G4 - AF al 10% + 2% de proantocianidina y SBU. Las superficies tratadas se cubrieron con resina compuesta (Filtek Z250 – 3M ESPE) y, tras 24 h, se seccionaron para el ensayo de microtracción. Dos especímenes de cada grupo fueron analizados con microscopía electrónica de barrido. Los datos se analizaron con ANOVA y prueba t no apareada (α=0,05). Resultados: No se observaron diferencias significativas en los valores de resistencia adhesiva entre los grupos (p=0,626), ni al evaluar el tipo de adhesivo individualmente, cambiando solo el tratamiento superficial (p=0,146 para SB y p=0,779 para SBU). Conclusión: La incorporación de proantocianidina en ácido fosfórico no afectó la fuerza de adhesión inmediata en dentina.
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