Aging Effect on Push-Out Bond Strength of Six Resin Cements: An In Vitro Study
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2025-03-20
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MDPI
Resumen
The number of resin cements marketed for fiber post cementation has increased significantly. This study compared the push-out bond strength (PBS) of self-adhesive and universal resin cements used to lute fiber posts at 24 h and after 6 months of aging in artificial saliva. Fiber posts were luted to eighty human roots endodontically treated with four self-adhesive/one-step resin cements, with one of them also used in combination with its appropriate tooth primer; one universal resin cement, applied as one-step or together with its corresponding universal adhesive (multi-step); and one adhesive/multi-step resin cement, as a control. After storage (24 h or 6 months), the interfaces were subjected to PBS tests and the data were analyzed by two-way ANOVA and Tukey and Student’s t-tests (p < 0.05 defined as statistical significance). The results showed that Scotchbond Universal Plus + RelyX Universal attained statistically higher values at 24 h and 6 months. At 24 h, all resin cements yielded similar PBS to root dentin, while at 6 months, NormoCem obtained the lowest PBS. Storage for 6 months significantly decreased PBS for NormoCem and Multilink Automix. Root section did not influence PBS regardless of storage time. It was concluded that PBS is resin cement dependent. The universal resin cement, RelyX Universal, applied in combination with Scotchbond Universal Plus adhesive, obtained a higher and more stable PBS than the other resin cements tested.
Descripción
Este estudio evaluó la resistencia de unión de diferentes cementos resinosos utilizados para fijar postes de fibra en raíces dentales tratadas. Se compararon cementos autoadhesivos y universales, midiendo su fuerza de adhesión a las 24 horas y después de 6 meses de envejecimiento en saliva artificial. Los resultados mostraron que la combinación de RelyX Universal con el adhesivo Scotchbond Universal Plus ofreció la mejor y más estable resistencia con el tiempo. En cambio, algunos cementos, como NormoCem, perdieron fuerza tras 6 meses. Se concluye que la elección del cemento influye significativamente en la durabilidad de la unión.
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Citación
Baena E, Escribano N, Fuentes V, Reche I, Ceballos L. Aging Effect on Push-Out Bond Strength of Six Resin Cements: An In Vitro Study. Materials (Basel). 2025 Mar 20;18(6):1371. doi: 10.3390/ma18061371. PMID: 40141653; PMCID: PMC11943558.
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