Shear Bond Strength of Two Types of Glass Ionomer to Bleached Dentin: Effect of Delayed Bonding and Antioxidant Agent.
Open Dent J
; 10: 720-727, 2016.
Article
in En
| MEDLINE
| ID: mdl-28217187
ABSTRACT
BACKGROUND:
Studies have shown a reduction in bond strength of composites and glass ionomer to bleached enamel and dentin. Several methods have been proposed to reverse compromised bond strength.OBJECTIVE:
The aim of this study was to evaluate the effect of delayed bonding and application of antioxidant agent on the bond strength of reinforced self-cured (Fuji IX) and light-cured glass ionomers (Fuji II LC) to bleached dentin.MATERIAL:
Eighty extracted third molars were randomly divided into 8 groups. Buccal dentin surfaces received different treatments Two control groups no treatment + bonding Fuji IX or Fuji II LC. Two immediate bonding groups bleaching + bonding Fuji IX or Fuji II LC. Two delayed bonding groups bleaching + 7 days delay + bonding Fuji IX or Fuji II LC. Two sodium ascorbate application groups Bleaching + application of 10% sodium ascorbate + bonding Fuji IX or Fuji II LC. All samples were tested for shear bond strength. Two-way analysis of variance (ANOVA) was used to compare the mean and standard deviations among groups, followed by the Tukey's test for significant interaction.RESULTS:
No statistically significant difference was detected in shear bond strength of Fuji IX to bleached or normal dentin. Although a significant reduction was found shear bond strength values of Fuji II LC to bleached dentin, no significant difference was observed between no bleaching group and those treated with 10% sodium ascorbate or 7 days of delay in bonding for both types of glass ionomer.CONCLUSION:
Bleaching had no significant effect on shear bond strength of Fuji IX to dentin; this type of GI can be used immediately after bleaching.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Open Dent J
Year:
2016
Document type:
Article
Affiliation country:
Iran