Evaluation Of The Effect Of Different Surface Treatments, Aging And Enzymatic Degradation On Zirconia-Resin Micro-Shear Bond Strength.
Clin Cosmet Investig Dent
; 12: 1-8, 2020.
Article
in En
| MEDLINE
| ID: mdl-32021475
ABSTRACT
PURPOSE:
The purpose of this study was to evaluate the effect of surface treatments on zirconia-resin bonding and the effect of aging on bond durability for one year.METHOD:
Three hundred and twenty zirconia blocks were divided into 4 equal study groups. Group 1 (control) as-sintered, group 2 (GB) grit-blasted, group 3 (LAS) laser-etched, group 4 (SIE) selective infiltration etching. Composite cylinders were bonded to the zirconia with resin cement and ceramic primer. Aging was performed following 3 different aging protocols thermocycling, storage in distilled water, or storage in an enzymatic esterase solution. Micro-shear bond strength test (µSBS) was recorded using a universal testing machine. µSBS values were analyzed using two-way Analysis of Variance followed by Tukey post-hoc tests. Level of significance was set at 0.05.RESULTS:
GB, LAS and SIE groups showed significantly higher values when compared to control. Groups GB, LAS and SIE reported a significant decrease up to 50% in µSBS after water storage and enzymatic degradation, while control group reported a 90% decrease. Failure analysis showed mainly adhesive failure for control group, while the percentage of cohesive failure in resin cement was higher in SIE group compared to GB and LAS groups.CONCLUSION:
Water aging and esterase solutions played a significant role by increasing bond degradation. A minimum of one-year water and esterase storage medium should be used to evaluate the durability of the bond between resin cement and zirconia.
Full text:
1
Database:
MEDLINE
Type of study:
Guideline
Language:
En
Year:
2020
Type:
Article