title: Effect of Bulk-filling on the Bonding Efficacy in Occlusal Class I Cavities.
abstract: OBJECTIVE
  To evaluate the effect of bulk filling Class I posterior cavities on bonding to cavity-bottom dentin.
  
  
  METHODS
  Two flowable "base" bulk-fill composites (Filtek Bulk Fill Flowable, SDR), one paste-like "full-body" bulk-fill composite (Tetric EvoCeram Bulk Fill) and one conventional paste-like composite (Filtek Z100) were bonded (G-ænial Bond) to either a flat surface (3.5 x 3.5 x 4 mm; C-factor: 0.18) or a Class I cavity (3.5 x 3.5 x 4 mm; C-factor: 5.8). After 1-week water storage, the restorations were sectioned to obtain 4 rectangular microspecimens that were subjected to microtensile bond strength (μTBS) testing.
  
  
  RESULTS
  No significant differences in μTBS were recorded between all composites when bonded onto a flat surface (p > 0.05). When bonded into a Class I cavity, the μTBS of all composites except SDR significantly decreased (p < 0.001).
  
  
  CONCLUSIONS
  Both the configuration factor and the type of bulk-fill composite were found to have a great impact on bonding to cavity-bottom dentin.
authors.forename: Annelies
authors.initials: A
authors.lastname: Van Ende
authors.forename: Jan
authors.initials: J
authors.lastname: De Munck
authors.forename: Kirsten
authors.initials: K
authors.lastname: Van Landuyt
authors.forename: Bart
authors.initials: B
authors.lastname: Van Meerbeek
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification*; D003764:Dental Materials / Q000737:chemistry*; D003804:Dentin / Q000648:ultrastructure; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D011897:Random Allocation; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014233:Tricarboxylic Acids / Q000737:chemistry; D014783:Viscosity; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C501891:Tetric EvoCeram; D014233:Tricarboxylic Acids; C083568:Z100 composite resin; D014867:Water; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; C074277:ethoxylated bis-phenol A dimethacrylate; D017438:Bisphenol A-Glycidyl Methacrylate; C098756:4-methacryloxyethyltrimellitic acid; D012822:Silicon Dioxide; D015040:Zirconium