Comparative study of the bond strength of composite resins in the cementation of indirect restorations

摘要

Introduction: Nowadays there is an increasing development of materials capable of reducing the time of appointment, as is the case of multi-mode adhesive systems. The same occurs with composite resins as the creation of bulk-fill resins. This new type of resin can be classified, for its properties, between the fluid resins and the nanohybrid and microhybrid resins [1]. As for their mechanical properties, these materials have been shown to be stiffer (higher modulus of elasticity) and more plastic (greater plastic deformation) than conventional fluid resins. However, they have lower mechanical properties when compared with conventional nano-hybrid and microhybrid resins [1]. The new generation of bulk-fill resins has a low polymerization contraction value when compared to both nanohybrid and microhybrid fluid and non-flowing resins [2–4], so the aim of this study is to evaluate if it is possible to cement indirect restorations with Filtek™ Bulk Fill.