title: Shear bond strength of a denture base acrylic resin and gingiva-colored indirect composite material to zirconia ceramics.
abstract: OBJECTIVE
  To evaluate the shear bond strengths of two gingiva-colored materials (an indirect composite material and a denture base acrylic resin) to zirconia ceramics and determine the effects of surface treatment with various priming agents.
  
  
  METHODS
  A gingiva-colored indirect composite material (CER) or denture base acrylic resin (PAL) was bonded to zirconia disks with unpriming (UP) or one of seven priming agents (n=11 each), namely, Alloy Primer (ALP), Clearfil Photo Bond (CPB), Clearfil Photo Bond with Clearfil Porcelain Bond Activator (CPB+Act), Metal Link (MEL), Meta Fast Bonding Liner (MFB), MR. bond (MRB), and V-Primer (VPR). Shear bond strength was determined before and after 5000 thermocycles. The data were analyzed with the Kruskal-Wallis test and Steel-Dwass test.
  
  
  RESULTS
  The mean pre-/post-thermalcycling bond strengths were 1.0-14.1MPa/0.1-12.1MPa for the CER specimen and 0.9-30.2MPa/0.1-11.1MPa for the PAL specimen. For the CER specimen, the ALP, CPB, and CPB+Act groups had significantly higher bond strengths among the eight groups, at both 0 and 5000 thermocycles. For the PAL specimen, shear bond strength was significantly lower after thermalcycling in all groups tested. After 5000 thermocycles, bond strengths were significantly higher in the CPB and CPB+Act groups than in the other groups.
  
  
  CONCLUSIONS
  For the PAL specimens, bond strengths were significantly lower after thermalcycling in all groups tested. The MDP functional monomer improved bonding of a gingiva-colored indirect composite material and denture base acrylic resin to zirconia ceramics.
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Kubochi
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan. Electronic address: komine.futoshi@nihon-u.ac.jp.
authors.forename: Futoshi
authors.initials: F
authors.lastname: Komine
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Fushiki
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Yagawa
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Serina
authors.initials: S
authors.lastname: Mori
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D000180:Acrylic Resins; D002516:Ceramics; D003116:Color; D003188:Composite Resins; D001840:Dental Bonding; D003764:Dental Materials; D003819:Denture Bases; D005881:Gingiva; D011140:Polyurethanes; D033081:Shear Strength; D015040:Zirconium
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003764:Dental Materials; D011140:Polyurethanes; D015040:Zirconium; C028541:zirconium oxide
keywords: Acrylic resin; Bond strength; Composite resin; Zirconia