Antioxidant effect on the shear bond strength of composite to bleached bovine dentin
Braz. j. oral sci
; 10(1): 33-36, jan.-mar. 2011. tab
Article
in English
| LILACS, BBO - Dentistry
| ID: lil-589648
Responsible library:
BR218.1
ABSTRACT
Several studies have shown that compromised bonding to bleached enamel can be reversed with antioxidants. Aim:
The aim of this study was investigate the effect of the antioxidant treatment on themicro-shear bond strength of a composite resin with a clinically acceptable antioxidant usage timetaken into account.Methods:
Using in vitro techniques, the effect of the antioxidant sodiumascorbate (SA) was evaluated on the micro-shear bond strength of a hybrid composite resin(Tetric® A2 Ivoclar Vivadent) to dentin, which was bleached with 35% carbamide peroxide(Opalescence Quick, Ultradent Products Inc). Thirty-five intact flat buccal dentin surfaces frombovine incisors were randomly assigned to five groups which were subjected to the following treatment protocols group 1, bleached for 45 min and bonded immediately afterwards; groups 2and 3, bleached and then treated with 10% SA for 10 and 5 min before bonding, respectively; group 4, stored in distilled water for seven days after bleaching and before bonding; group 5,received no bleaching or antioxidant treatment. After the bonding procedure, specimens were subjected to a micro-shear bonding test. Data were analyzed by ANOVA and a post-hoc Tukeystest.Results:
One-way ANOVA revealed significant differences in bond strength among the five groups.Conclusions:
It was found that the shear bond strength was reduced by carbamide peroxide bleaching, and that the antioxidant SA was ineffective at reversing the composite strength at the concentrations and treatment times examined.
Full text:
Available
Collection:
International databases
Database:
BBO - Dentistry
/
LILACS
Main subject:
Tooth Bleaching
/
Composite Resins
/
Shear Strength
/
Antioxidants
Type of study:
Practice guideline
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2011
Document type:
Article
Affiliation country:
Iran
Institution/Affiliation country:
Medical Science+IR