Microtensile bond strength of indirect resin composite to resin-coated dentin: interaction between diamond bur roughness and coating material.
This aim of this study was to determine the effect of type of bur and resin-coating material on microtensile bond strength (microTBS) of indirect composite to dentin. Dentin surfaces were first ground with two types of diamond bur and resin-coated using UniFil Bond (UB) or Adper Single Bond (SB), and then bonded to a resin composite disc for indirect restoration with adhesive resin cement. After storage for 24 hr in distilled water at 37 degrees C, microTBS was measured (crosshead speed 1 mm/min). When UB was applied to dentin prepared using the regular-grit diamond bur, microTBS was significantly lower than that in dentin prepared using the superfine-grit bur. In contrast, no significant difference was found between regular-grit and superfine-grit bur with SB. However, more than half of the superfine-grit specimens failed before microTBS testing. These results indicate that selection of bur type is important in improving the bond strength of adhesive resin cement between indirect resin composite and resin-coated dentin.
Kameyama
Atsushi
A
Department of Operative Dentistry, Tokyo Dental College, Mihama-ku, Chiba, Japan. kameyama@tdc.ac.jp
Oishi
Takumi
T
Sugawara
Toyotarou
T
Hirai
Yoshito
Y
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000295:instrumentation*; D003764:Dental Materials / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry
D001896:Boron Compounds; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C470230:Gradia; C470486:Linkmax; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; C510179:UniFil Flow; C407402:Unifil Bond; C115612:single bond; D014867:Water; D017438:Bisphenol A-Glycidyl Methacrylate; D018130:Diamond; D019904:Polymethyl Methacrylate; C049495:Super-bond