The effect of thermocycling and acid pre-etch on bond strength to enamel of different self-etch adhesives

• Baracco Cabañes, Bruno ^[1] ; Fuentes Fuentes, Mª Victoria ^[1] ; Ceballos García, Laura ^[1]
  1. [1] Universidad Rey Juan Carlos

     Universidad Rey Juan Carlos

     Madrid, España

     
• Localización: Científica dental: Revista científica de formación continuada, ISSN 1697-6398, ISSN-e 1697-641X, Vol. 13, Nº. Extra 4 (Versión en inglés de los trabajos ganadores y los segundos clasificados de los premios de la revista), 2016, págs. 28-36
• Idioma: inglés
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• Resumen

  • Introduction: Self-etch adhesives are becoming more widely used. Their acidity can vary greatly. This determines the degree of infiltration into hard dental tissues and its adhesive ability.

    Objective: To determine the effect of thermocycling and pre-etching with orthophosphoric acid on the adhesive resistance of different self-etching adhesives.

    Method: The following adhesives were applied to bovine vestibular enamel: 1) Filtek Silorane (FS), 2) Filtek Silorane with acid pre-etch (AFS), 3) Adper Scotchbond 1XT (XT), 4) Adper Scotchbond SE (SE) and 5) Adper Scotchbond SE with acid pre-etch (ASE). All were applied following the manufacturer’s instructions. The restored teeth were stored in water (24h, 37 °C) or thermocycled (5000 and 10000 cycles) before being sectioned and subjected to the microtraction test. Two-way ANOVA and Student-Newman-Keulstests were used for statistical analysis (α=0.05).

    Results: XTZ250 achieved the highest values and FS achieved the lowest after all artificial aging. 10000x thermocycling significantly reduced bond strength in all systems. AFS bond strength was 25.7% greater than FS, while ASE was 3.8% greater than SE.

    Conclusions: The material and aging influenced bond strength. The ultra-mild self-etch adhesive obtained the lowest values after all aging treatments. Preetching was especially beneficial for FS.