Abstract
The adhesion of resin-modified glass-ionomer (RMGI) to composite resin plays a very important role in the durability of sandwich restorations. Aim - to explore that co-curing RMGIC and composite resin to GIC using self-etch adhesives and bulk-fill materials may create a chemical bond and improve the bond strengths between these two materials. Materials and methods. Twenty specimens were prepared on gypsum blocks, with wells prepared in them by drilling holes, to retain the RMGIC. The specimens were randomly divided into two groups of 10 specimens each. In group I, after etching and rinsing the surface of cement, a thin layer of an adhesive, which was a Total-Etch type, was applied between RMGIC and the composite resin. In group II, the stage of etching was missed, a Self-Etch adhesive and a thin layer of bulk fill material were applied on the cement surface. Then after curing all the specimens, the shear bond strength was measured using a Bisco Shear bond testing machine. Failure mode was assessed under a stereomicroscope. Results. There were statistically significant differences in bond strengths between the groups (P< 0.05). Failures were predominantly of the cohesive type in all the groups. Conclusion. Based on the results of this study, the use of self-etch adhesive resin on the unset glass-ionomer and using bulk-fill material yielded the highest bond strength in the combined use of glass-ionomer cement and composite material.
Highlights
В статье представлен модифицированный подход при комбинированном использовании композитного материала и гибридного стеклоиономерного цемента (СИЦ)
Twenty specimens were prepared on gypsum blocks, with wells prepared in them by drilling holes, to retain the RMGIC
The specimens were randomly divided into two groups of 10 specimens each
Summary
В статье представлен модифицированный подход при комбинированном использовании композитного материала и гибридного стеклоиономерного цемента (СИЦ). Двухслойная техника, или же так называемая сэндвич-техника, восстановления боковой группы зубов предусматривает использование стеклоиономерного цемента и композитного материала в определенной последовательности. Цель — проанализировать влияние очередности этапов техники сочетанного применения композиционного материала и стеклоиономерного цемента на качественную и надежную связь между материалами, соответственно и на прогноз реставрации зуба. В первой группе восстановление велось по классическому протоколу сэндвич-техники. При оценке силы сцепления СИЦ и композита в 1 группе показатели были равны приблизительно 14.25 ± (2.3) мПа. Анализируя полученные данные, можно предположить, что использование предложенного нами модифицированного подхода комбинированного использования гибридного стеклоиономерного цемента и композитного материала будет способствовать более высоким показателям силы сцепления между этими материалами и способствовать долгосрочному прогнозу реставрации зуба. Aim — to explore that co-curing RMGIC and composite resin to GIC using self-etch adhesives and bulk-fill materials may create a chemical bond and improve the bond strengths between these two materials
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