Bond Strength of CAD/CAM Ceramic by Various Modern Resin Cements in Multilayer Technique

Abstract

BACKGROUND
 The purpose of the study was to assess bond strength of various modern resin cements based on CAD-CAM ceramic in multilayer technique.
 METHODS
 CAD-CAM blocks specimens, IPS e.max ZirCAD (core, n=60) and IPS e max CAD (veneer, n=60) were fabricated. All specimens were divided into 3 groups (n=20). By multilayer technique, zirconia core and veneer were cemented with 3 different cements, RelyX U200 (MR), Panavia V5 (MP), and Multilink N (MM]. Ageing was performed for (5-55°C, 5000). The shear bond strength test was performed with a universal test unit. The data were analyzed using the analysis of variance (ANOVA) and Tukey significant difference test (alpha =0.05).
 RESULTS
 The SBS differed substantially depending on the resin cement used. Group MP had the highest bond strength (P < .001) and lower MM. No significant differences were found between the groups MR and MM.
 CONCLUSIONS
 Significant differences were found in the shear bond strength of the veneer luted to zirconia base in multilayer technique using self-adhesive and conventional cement. The bond strength depended on the combination of ceramic and cement. The Panavia V5 had the highest bond strength.