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Materials 2016, 9(3), 210;

Effect of Curing Mode on Shear Bond Strength of Self-Adhesive Cement to Composite Blocks

Department of Conservative Dentistry, College of Medicine, Inha University, Seoul 03722, Korea
Department of Conservative Dentistry, Oral science research center and microscope center, College of Dentistry, Yonsei University, 50-1 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Marco Salerno
Received: 17 January 2016 / Revised: 12 March 2016 / Accepted: 15 March 2016 / Published: 18 March 2016
(This article belongs to the Section Advanced Composites)
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To overcome the disadvantages of computer-aided design/computer-aided manufacturing (CAD/CAM) processed indirect restorations using glass-ceramics and other ceramics, resin nano ceramic, which has high strength and wear resistance with improved polish retention and optical properties, was introduced. The purpose of this study was to evaluate the shear bond strength and fracture pattern of indirect CAD/CAM composite blocks cemented with two self-etch adhesive cements with different curing modes. Sand-blasted CAD/CAM composite blocks were cemented using conventional resin cement, Rely X Ultimate Clicker (RXC, 3M ESPE, St. Paul, MN, USA) with Single Bond Universal (SB, 3M ESPE, St. Paul, MN, USA) for the control group or two self-adhesive resin cements: Rely X U200 (RXU, 3M ESPE, St. Paul, MN, USA) and G-CEM Cerasmart (GC, GC corporation, Tokyo, Japan). RXU and GC groups included different curing modes (light-curing (L) and auto-curing (A)). Shear bond strength (SBS) analyses were performed on all the specimens. The RXC group revealed the highest SBS and the GC A group revealed the lowest SBS. According to Tukey’s post hoc test, the RXC group showed a significant difference compared to the GC A group (p < 0.05). For the curing mode, RXU A and RXU L did not show any significant difference between groups and GC A and GC L did not show any significant difference either. Most of the groups except RXC and RXU L revealed adhesive failure patterns predominantly. The RXC group showed a predominant cohesive failure pattern in their CAD/CAM composite, LavaTM Ultimate (LU, 3M ESPE, St. Paul, MN, USA). Within the limitations of this study, no significant difference was found regarding curing modes but more mixed fracture patterns were showed when using the light-curing mode than when using the self-curing mode. View Full-Text
Keywords: resin nano ceramic; self-adhesive resin cement; curing mode; fracture pattern resin nano ceramic; self-adhesive resin cement; curing mode; fracture pattern

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Kim, J.-Y.; Cho, G.-Y.; Roh, B.-D.; Shin, Y. Effect of Curing Mode on Shear Bond Strength of Self-Adhesive Cement to Composite Blocks. Materials 2016, 9, 210.

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