title: The effect of curing conditions on the dentin bond strength of two dual-cure resin cements.
abstract: OBJECTIVE
  The purpose of this study was to determine the effect of the curing condition (i.e., the curing mode and restoration thickness) on the tensile bond strength of a dual-cure resin cement applied to dentin.
  
  
  METHODS
  Indirect composite resin disks (1, 2, and 3mm in thickness) were prepared. The irradiance of a halogen light curing unit through each disk was measured by a curing radiometer. A measurement was also taken for the condition with no disk. Following this, two dual-cure resin cements, Panavia F2.0 and Panavia V5, were polymerized in either dual-cure mode or self-cure mode to bond the composite resin disk to the flat dentin surface. The specimens were sectioned and subjected to a microtensile bond strength (μTBS) test after 24h of water storage. The data were statistically analyzed by two-way ANOVA followed with multiple comparisons by post-hoc Tukey's test (α=0.05).
  
  
  RESULTS
  The irradiance values [mW/cm2] measured through indirect composite resin disks were 600 (0mm), 200 (1mm), 90 (2mm), and not detected (3mm). Two-way ANOVA indicated that both the curing condition and the type of resin cement affected the μTBS (p<0.001). The μTBS results for Panavia V5 bonded to dentin were significantly higher than those of Panavia F2.0 bonded to dentin (p<0.05).
  
  
  CONCLUSIONS
  The curing condition affected the tensile bond strength of the dual-cure resin cements to dentin. A newly developed resin cement, Panavia V5, showed higher dentin bonding than Panavia F2.0 in both dual- and self-cure modes.
authors.affiliation: Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Atsuko
authors.initials: A
authors.lastname: Tagami
authors.affiliation: Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. Electronic address: rtakahashi.ope@tmd.ac.jp.
authors.forename: Rena
authors.initials: R
authors.lastname: Takahashi
authors.affiliation: Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Nikaido
authors.affiliation: Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
mesh_terms: D000180:Acrylic Resins; D003188:Composite Resins; D003738:Dental Cements; D003793:Dental Restoration, Permanent; D017220:Dentin-Bonding Agents; D011140:Polyurethanes; D019279:Resin Cements; D055116:Self-Curing of Dental Resins; D013718:Tensile Strength
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D011140:Polyurethanes; D019279:Resin Cements
keywords: Dual-cure resin cement; Indirect restoration; Irradiance; Microtensile bond strength test