title: Adhesive strength between fiber-reinforced composites and veneering composites and fracture load of combinations of these materials.
abstract: OBJECTIVE
  This study examined the influence of the adhesive strength between fiber-reinforced composites (FRC) and veneering composites on the fracture load of combinations of these materials.
  
  
  METHODS
  Six materials were used. An experimental material called BR-100, Vectris, and FibreKor were the types of FRC. Estenia, Targis, and Sculpture were used as veneering composites. With the Estenia/BR-100 combination, the surface of the FRC was subjected to three different conditions before veneering. Ten specimens of each combination were fabricated and divided into two groups: One group was stored in 37 degrees C distilled water for 24 hours, and the other was thermocycled (4 degrees C/60 degrees C, 10,000 cycles). Adhesive strength between FRCs and veneering composites was determined using the compressive shear strength test. In addition, fracture loads of laminate specimens were determined.
  
  
  RESULTS
  Good adhesive strength was obtained by leaving an unpolymerized layer on the surface of the FRC or by performing silane and bonding treatment. In the Estenia/BR-100 combination, when the adhesive strength was low, the fracture load of the laminate specimens was also low. However, the difference in fracture load was not as large as that seen in adhesive strength. The fracture load of each laminate specimen was significantly lower after thermocycling.
  
  
  CONCLUSIONS
  The adhesive strength between the FRCs and veneering composite had an effect on the fracture load of the combination.
authors.affiliation: Division of Oromaxillofacial Regeneration, Course for Integrated Oral Sciences and Stomatology, Osaka University Graduate School of Dentistry, Japan. wakitomo@dent.osaka-u.ac.jp
authors.forename: Tomonori
authors.initials: T
authors.lastname: Waki
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Kazumichi
authors.initials: K
authors.lastname: Wakabayashi
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Mutobe
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yatani
mesh_terms: D000268:Adhesiveness; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D019245:Compressive Strength; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003801:Dental Veneers; D004338:Drug Combinations; D005898:Glass; D005899:Glass Ionomer Cements; D006358:Hot Temperature; D008422:Materials Testing; D008689:Methacrylates; D011140:Polyurethanes; D033081:Shear Strength; D012823:Silicate Cement; D014867:Water
chemical_list: D003188:Composite Resins; D004338:Drug Combinations; C113550:FiberKor, sculpture; D005899:Glass Ionomer Cements; D008689:Methacrylates; D011140:Polyurethanes; C111282:dental polyglass; C009753:fiberglass; C404582:urethane tetramethacrylate; C091839:urethanetrimethacrylate; D014867:Water; D012823:Silicate Cement; D017438:Bisphenol A-Glycidyl Methacrylate