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KMID : 1035320150420040365
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Korean Society for Dental Materials
2015 Volume.42 No. 4 p.365 ~ p.374
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Shear bond strengths of various self-adhesive resin cements between bovine dentin and 4 types of adherends
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Kim Ah-Jin
Park Da-Ryeong
Oh Seung-Han
Bae Ji-Myung
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Abstract
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The purpose of this study was to evaluate the shear bond strengths of self-adhesive resin cements that was applied similar to clinical condition between bovine dentin and four types of adherend. The self-adhesive resin cements, which were used in this study, included U-Cem Premium (U-Cem, Vericom), Rely X Unicem II Automix (Rely X, 3M ESPE), Maxcem Elite (Maxcem: Kerr) and Clearfil SA luting Cement (Clearfil, Kuraray). Four types of adherends, which were used in the research, included composite resin block for CAD-CAM (Polyglass Blank, Vericom), base metal (Vera Bond 2V, Albadent), zirconia (Mazic zir, Vericom) and lithium disilicate (IPS E.max, Ivoclar/Vivadent). The block of adherend was made with breadth 3 mm × length 3 mm × height 3 mm. It adhered adherend to bovine dentin, repeated photopolymerization twice by 20 seconds per surface in the status of applying the load in 5 N, added 30minutes to the holding time following the polymerization instructed by a maker, and then kept it in 37°C dry oven. The adhered specimen was kept for 24 hours in 37°C distilled water until before the experiment. The shear bond strength was measured with 0.75 mm/min cross-head speed by using a universal testing machine(Z020, Zwick, Ulm, Germany). The blade of the used jig was a straight line. The bond strength with resin adherend was the highest in Rely X. U-cem and Clearfil were significantly higher than Maxem.(p<0.05). As for the bond strength with zirconia, Rely X and U-Cem were significantly higher than other self-adhesive resin cements(p<0.05). In terms of the bond strength with metal and lithium disilicate, Rely X, U-Cem, Clearfil were significantly higher than Maxcem(p<0.05). Hence, Rely X is recommended to the adhesion with the composite resin adherend. Rely X and U-Cem are recommended to the adhesion of zirconia. Maxem, which shows the lowest bond strength in all adherends, needs to be paid a great attention given being used in a clinical trial.
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KEYWORD
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Self-adhesive resin cement, Shear bond strength, Adherend, Bovine teeth
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