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Effect of resin-modified glass-ionomer cement lining and composite layering technique on the adhesive interface of lateral wall
AZEVEDO, Larissa Marinho; CASAS-APAYCO, Leslie Carol; VILLAVICENCIO ESPINOZA, Carlos Andres; WANG, Linda; NAVARRO, Maria Fidela de Lima; ATTA, Maria Teresa.
  • AZEVEDO, Larissa Marinho; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • CASAS-APAYCO, Leslie Carol; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • VILLAVICENCIO ESPINOZA, Carlos Andres; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • WANG, Linda; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • NAVARRO, Maria Fidela de Lima; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
  • ATTA, Maria Teresa; University of São Paulo. Bauru School of Dentistry. Department of Restorative Dentistry, Endodontics and Dental Materials. Bauru. BR
J. appl. oral sci ; 23(3): 315-320, May-Jun/2015. graf
Article in English | LILACS, BBO | ID: lil-752427
ABSTRACT
Interface integrity can be maintained by setting the composite in a layering technique and using liners. Objective The aim of this in vitro study was to verify the effect of resin-modified glass-ionomer cement (RMGIC) lining and composite layering technique on the bond strength of the dentin/resin adhesive interface of lateral walls of occlusal restorations. Material and Methods Occlusal cavities were prepared in 52 extracted sound human molars, randomly assigned into 4 groups Group 2H (control) – no lining + two horizontal layers; Group 4O no lining + four oblique layers; Group V-2H RMGIC lining (Vitrebond) + two horizontal layers; and Group V-4O RMGIC lining (Vitrebond) + four oblique layers. Resin composite (Filtek Z250, 3M ESPE) was placed after application of an adhesive system (Adper™ Single Bond 2, 3M ESPE) dyed with a fluorescent reagent (Rhodamine B) to allow confocal microscopy analysis. The teeth were stored in deionized water at 37oC for 24 hours before being sectioned into 0.8 mm slices. One slice of each tooth was randomly selected for Confocal Laser Scanning Microscopy (CLSM) analysis. The other slices were sectioned into 0.8 mm x 0.8 mm sticks to microtensile bond strength test (MPa). Data were analyzed by two-way ANOVA and Fisher's test. Results There was no statistical difference on bond strength among groups (p>0.05). CLSM analysis showed no significant statistical difference regarding the presence of gap at the interface dentin/resin among groups. Conclusions RMGIC lining and composite layering techniques showed no effect on the microtensile bond strength and gap formation at the adhesive interface of lateral walls of high C-factor occlusal restorations. .
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Full text: Available Index: LILACS (Americas) Main subject: Dental Bonding / Dentin-Bonding Agents / Composite Resins / Dentin / Glass Ionomer Cements Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2015 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Dental Bonding / Dentin-Bonding Agents / Composite Resins / Dentin / Glass Ionomer Cements Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2015 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR