Influence of resin-coating on bond strength of resin cements to dentin and CAD/CAM resin block in single-visit and multiple-visit treatment

Abstract

The purpose of this study was to evaluate the influence of resin-coating using one-bottle adhesives on the bond strength of resin cements in single-visit and multiple-visit treatments. Three one-bottle adhesives were used for resin-coating and/or pre-treatment adhesives prior to cementation, in conjunction with resin cements from the same manufacturers: Clearfil Universal Bond Quick with Panavia V5 UBQ/Pv5, Scotchbond Universal Adhesive with RelyX Ultimate SBU/RxU, and Optibond All-in-one with NX3 Nexus OP/NX3. Bovine dentin surfaces were left uncoated or resin-coated. After 1-h water storage single-visit or 1-week water storage with a non-eugenol temporary cement multiple-visit, a CAD/CAM resin block was cemented to uncoated or resin-coated dentin surfaces. Microtensile bond strengths μTBSs were measured and statistically analyzed α=0.05. Application of resin-coating improved μTBSs. The multiple-visit group exhibited lower values of μTBS than the single-visit group. Selection of the materials affected μTBSs. Resin-coating and single-visit treatment are desirable for CAD/CAM resin composite restorations.