Comparative study of tensile bond strength between resin cements and hybrid materials

Abstract

Purpose: To compare tensile bond strength among the hybrid materials (VITA ENAMIC®, SHOFU Block HC, Katana AVENCIA and Experimental material) using two primers (Universal ceramic primer and RelyX ceramic primer) and two resin cements (Super-Bond C&B and RelyXTM U200). Methods: Twenty blocks of 4×4×1 mm3 were prepared from each material type. In VITA ENAMIC® group, specimens were conditioned with 5% Hydrofluoric acid and primer. In SHOFU Block HC and Katana AVENCIA groups, specimens were treated with 50µm alumina and primer. In experimental material, specimens were etched with 65% Phosphoric acid. Ten specimens were randomly assigned to each group for different resin cement then cemented on bovine enamel. All cemented specimens were stored in water at 37ºC for 24 hours. TBS was tested with a universal testing machine. The fractured interface was examined with a stereomicroscope and TBS data were statistically analyzed. Result: The experimental material showed the highest TBS values, followed by VITA ENAMIC®, Katana AVENCIA, and SHOFU Block HC, respectively. There was no significant difference between different resin cement (p>0.05). In SHOFU Block HC group, all fractured specimens showed adhesive failure. Conclusion: The types of inorganic components and surface treatment of the hybrid materials have an effect on TBS values.