title: Marginal gap repair with flowable resin-based composites.
abstract: This study was designed to test the hypothesis that the flowable/dentin interface has the weakest bond and highest frequency of failure when a resin-based composite is repaired using a flowable composite. Comparing three specific groups--dentin, flowable composite, and hybrid composite-under the Kruskal-Wallis test showed that the mean bond strength values at the flowable/dentin interface and within the dentin were significantly lower than those at the hybrid/flowable interface and within the flowable resin. Dentin near the pulp chamber yielded consistently lower bond strength values than dentin located at the dentino-enamel junction. Bonding at the flowable resin/dentin interface showed the weakest bond and highest frequency of failure.
authors.affiliation: Department of Operative Dentistry, University of Florida College of Dentistry, Gainesville, USA.
authors.forename: Valeria V
authors.initials: VV
authors.lastname: Gordan
authors.forename: Chiayi
authors.initials: C
authors.lastname: Shen
authors.forename: Ivar A
authors.initials: IA
authors.lastname: Mjor
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding; D018772:Dental Marginal Adaptation; D017269:Dental Prosthesis Repair; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D044367:Phase Transition; D019233:Retreatment; D033081:Shear Strength; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C444701:Filtek Z250; C470818:Heliomolar Flow; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate