title: Effect of air abrasion and thermocycling on resin adaptation and shear bond strength to dentin for an etch-and-rinse and self-etch resin adhesive.
abstract: This study examined the effect of air abrasion and thermocycling on the adaptation and shear bond strength, of composite resin bonded to dentin using etch-and-rinse and self-etch resin adhesives. Confocal microscopy showed both adhesives closely adapted to dentin and a significantly (p<0.001) greater number of resin tags were observed for the etch-and-rinse adhesive. Air abrasion significantly increased resin tag length (p<0.05) for the etch-and-rinse adhesive and significantly increased the number (p<0.001), length (p<0.001) and thickness (p<0.01) of tags for the self-etch adhesive. However, air abrasion resulted in defect formation within the hybrid layer and thermocycling caused separation of the hybrid layer from adjacent dentin containing resin tags. A significant (p<0.05) reduction in shear bond strength was observed for the etch-and-rinse adhesive following thermocycling. Both adhesive systems adapted well to dentin in vitro and shear bond strengths were similar. The area of tag penetration into dentin was significantly (p<0.0001) enhanced following air abrasion.
authors.affiliation: The University of Queensland, School of Dentistry, Brisbane, Queensland 4000, Australia.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Freeman
authors.forename: Srinivas
authors.initials: S
authors.lastname: Varanasi
authors.forename: Ian A
authors.initials: IA
authors.lastname: Meyers
authors.forename: Anne L
authors.initials: AL
authors.lastname: Symons
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D020906:Air Abrasion, Dental; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003799:Dental Stress Analysis; D003804:Dentin; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006358:Hot Temperature; D006801:Humans; D018613:Microscopy, Confocal; D019279:Resin Cements; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C408584:Prompt L-Pop; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate