title: Marginal adaptation of composite resins under two adhesive techniques.
abstract: In the present research, different adhesive techniques were used to set up fillings with composite resins. After the application of etch and rinse or self etch adhesive technique, marginal adaptation of composite fillings was estimated by the length of margins without gaps, and by the microretention of resin in enamel and dentin. The study material consisted of 40 extracted teeth. Twenty Class V cavities were treated with 35% phosphorous acid and restored after rinsing by Adper Single Bond 2 and Filtek Ultimate-ASB/FU 3M ESPE composite system. The remaining 20 cavities were restored by Adper Easy One-AEO/FU 3M ESPE composite system. Marginal adaptation of composite fillings was examined using a scanning electron microscope (SEM). The etch and rinse adhesive technique showed a significantly higher percentage of margin length without gaps (in enamel: 92.5%, in dentin: 57.3%), compared with the self-etch technique with lower percentage of margin length without gaps, in enamel 70.4% (p < .001), and in dentin-22.6% (p < .05). In the first technique, microretention was composed of adhesive and hybrid layers as well as resin tugs in interprismatic spaces of enamel, while the dentin microretention was composed of adhesive and hybrid layers with resin tugs in dentin canals. In the second technique, resin tugs were rarely seen and a microgap was dominant along the border of restoration margins. The SEM analysis showed a better marginal adaptation of composite resin to enamel and dentin with better microretention when the etch and rinse adhesive procedure was applied.
authors.affiliation: Department for Restorative Dentistry and Endodontics, University of Niš, Faculty of Medicine, Clinic of Dentistry, Niš, Serbia. stefandacic1978@gmail.com.
authors.forename: Stefan
authors.initials: S
authors.lastname: Dačić
authors.affiliation: Faculty of Medicine, Department of Chemistry, University of Niš, Niš, Serbia.
authors.forename: Aleksandar M
authors.initials: AM
authors.lastname: Veselinović
authors.affiliation: Department for Restorative Dentistry and Endodontics, University of Niš, Faculty of Medicine, Clinic of Dentistry, Niš, Serbia.
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Mitić
authors.affiliation: Department for Restorative Dentistry and Endodontics, University of Niš, Faculty of Medicine, Clinic of Dentistry, Niš, Serbia.
authors.forename: Marija
authors.initials: M
authors.lastname: Nikolić
authors.affiliation: Military Hospital of Niš, Niš, Serbia.
authors.forename: Milica
authors.initials: M
authors.lastname: Cenić
authors.affiliation: Department for Restorative Dentistry and Endodontics, University of Niš, Faculty of Medicine, Clinic of Dentistry, Niš, Serbia.
authors.forename: Dragica
authors.initials: D
authors.lastname: Dačić-Simonović
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000000981:diagnostic imaging*; D003804:Dentin / Q000000981:diagnostic imaging*; D006801:Humans; D008963:Molar / Q000000981:diagnostic imaging; D019279:Resin Cements / Q000737:chemistry*
chemical_list: C000612360:Adper Easy One; D003188:Composite Resins; D019279:Resin Cements; D017438:Bisphenol A-Glycidyl Methacrylate
keywords: composite resins; dentin; enamel; marginal adaptation