Resistencia de unión en reparaciones con resina bulk-fill: impacto de los protocolos de superficie y adhesivos
DOI:
https://doi.org/10.15517/4tjc3431Palabras clave:
Bulk-fill; Resina; Compuesto; Tratamiento de superficies; Silano; Reparación.Resumen
Aunque la reparación es un enfoque conservador que preserva la estructura dental sana, no existe consenso sobre el tratamiento de superficie ni el protocolo adhesivo más eficaz para restauraciones de resina compuesta bulk-fill. Este estudio evaluó el efecto del asperizado con fresa diamantada y del arenado con óxido de aluminio (Al2O3, combinados con distintos protocolos adhesivos, sobre la resistencia de unión de reparación (BS) de resina compuesta bulk-fill envejecida. Se fabricaron 150 discos de resina Filtek™ One, sometidos a termociclado (5.000 ciclos de 5°/55 °C) y divididos en tres grupos de superficie (n=50): sin tratamiento (NT), asperizado con fresa diamantada (B) y arenado con Al2O3 (Al). Cada grupo se subdividió según cinco protocolos adhesivos (n=10): sin adhesivo (NA), Adper Single Bond 2 (SB), Single Bond Universal (SBU), Silano+Adper Single Bond 2 (S+SB) y Silano (S). Se fabricaron tres cilindros de resina Bulk Fill por espécimen para simular la reparación. Luego se evaluó BS mediante microcizallamiento y se analizó el patrón de fractura tras 24 horas de almacenamiento en agua. Los datos se analizaron mediante ANOVA de dos vías y prueba de Tukey (α=0,05). Con B o Al, solo NA mostró resultados inferiores. No se observaron diferencias significativas entre B/SB, B/SBU, B/S+SB y B/S, ni entre Al/SB, Al/SBU, Al/S+SB y Al/S. Al/SBU presentó mayor BS que B/SBU. Los patrones de fractura más frecuentes para B y Al fueron cohesivos y mixtos, mientras que para NT predominó el adhesivo. En conclusión, el tratamiento de superficie con B o Al, combinado con un protocolo adhesivo, mejora la BS. El tratamiento de superficie es clave para la reparación de resina compuesta bulk-fill, potenciando la eficacia de los sistemas adhesivos con o sin silano. Un adhesivo universal es tan eficaz como la combinación adhesivo-silano, ofreciendo mayor BS en superficies tratadas con arenado de Al2O3.
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Derechos de autor 2026 Samuel Eleutério Paiva Sousa, Fiorella Elizabeth Arévalo Tarrillo, Maria Paula Novaes Camargo Manna, Sandra Ribeiro de Barros da Cunha, Maria Ângela Pita Sobral.
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Datos de los fondos
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Números de la subvención Protocol No. 88882.376603/2019-01
