Influence of the bleaching agent and adhesive system on the bond strength of the restorative material to intracoronary dentin
RSBO (Impr.)
;
9(3): 303-308, Jul.-Sep. 2012. tab
Article
in English
| LILACS
| ID: lil-748129
ABSTRACT
Introduction:
The bond strength of dentin bleached with high concentrated agents can be reestablished if the appropriate restorative material is selected.Objective:
The aim of this study was to evaluate the influence of bleaching agents and adhesive system on bond strength of restorative material to intracoronary dentin. Material andmethods:
60 fragments of intracoronary dentin (25 mm2) were embedded in acrylic resin and divided into 3 groups (n = 10) GI - not bleached (control), GII - 35% hydrogen peroxide (35HP), GIII - 38% hydrogen peroxide (38HP). The gel was applied for 10 min onto the dentin surface. This protocol was repeated three times at a single session. After 14 days, the groups were divided into subgroups according to the adhesive system used in the restoration A - Self-etching (Clearfil SE Bond) and B - Total etching (Single Bond 2). The fragments were restored with Z100 Filtek resin using a bipartite matrix. After 24 h, the specimens were subjected to shear bond strength test. Data were analyzed by two-way ANOVA and Tukey test (p < 0.05).Results:
The group bleached with 38HP (6.02 ± 3.95) had the highest bond strength to dentin, followed by 35HP (5.36 ± 3.54), and control group (3.11 ± 2.71) (p < 0.05), although without statistically significant differences. It was also verified a higher bond strength in the group restored with the self-etching adhesive system (6.60 ± 4.18) when compared to the total etching system (3.06 ± 1.57).Conclusion:
When performing the restoration of teeth bleached with hydrogen peroxide at high concentrations (35% and 38%), self-etching adhesive system should be the first choice.
Full text:
Available
Index:
LILACS (Americas)
Language:
English
Journal:
RSBO (Impr.)
Journal subject:
Dentistry
Year:
2012
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
University of Ribeirão Preto/BR
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