Bond strength of self-adhesive resin cements to composite submitted to different surface pretreatments
Santos Victor Hugo dos, Griza Sandro, de Moraes Rafael Ratto, Faria-e-Silva Andre Luis,
소속 상세정보
( Santos Victor Hugo dos ) - Federal University of Sergipe Department of Dentistry
( Griza Sandro ) - Federal University of Sergipe Department of Materials Science and Engineering
( de Moraes Rafael Ratto ) - Federal University of Pelotas School of Dentistry Department of Restorative Dentistry
( Faria-e-Silva Andre Luis ) - Federal University of Sergipe School of Dentistry
KMID : 1034420140390010012
Abstract
Objectives: Extensively destroyed teeth are commonly restored with composite resin before cavity preparation for indirect restorations. The longevity of the restoration can be related to the proper bonding of the resin cement to the composite. This study aimed to evaluate the microshear bond strength of two self-adhesive resin cements to composite resin.
Materials and Methods: Composite discs were subject to one of six different surface pretreatments: none (control), 35% phosphoric acid etching for 30 seconds (PA), application of silane (silane), PA + silane, PA + adhesive, or PA + silane + adhesive (n = 6). A silicone mold containing a cylindrical orifice (1 mm2 diameter) was placed over the composite resin. RelyX Unicem (3M ESPE) or BisCem (Bisco Inc.) self-adhesive resin cement was inserted into the orifices and light-cured. Self-adhesive cement cylinders were submitted to shear loading. Data were analyzed by two-way ANOVA and Tukey's test (p < 0.05).
Results: Independent of the cement used, the PA + Silane + Adhesive group showed higher microshear bond strength than those of the PA and PA + Silane groups. There was no difference among the other treatments. Unicem presented higher bond strength than BisCem for all experimental conditions.
Conclusions: Pretreatments of the composite resin surface might have an effect on the bond strength of self-adhesive resin cements to this substrate.
키워드
Composite resins; Resin cements; Shear strength
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