Effect of three aging challenges on the bonding stability of resin-dentin interface using an etch-and-rinse adhesive
10.3760/cma.j.issn.1002-0098.2014.06.011
- VernacularTitle:三种老化方式对全酸蚀粘接系统牙本质粘接界面稳定性的影响
- Author:
Shuai XU
1
;
Ling ZHANG
;
Fang LI
;
Wei ZHOU
;
Yujiang CHEN
;
Jihua CHEN
Author Information
1. 第四军医大学口腔医学院修复科
- Keywords:
Dentin-bonding agents;
Tensile strength;
Aging;
Nanoleakage
- From:
Chinese Journal of Stomatology
2014;49(6):367-370
- CountryChina
- Language:Chinese
-
Abstract:
Objective To systematically investigate the aging effect of thermocycling,water storage and bacteria aggression on the stability of resin-dentin bonds.Methods Forty molars were sectioned perpendicularly to the axis of the teeth to expose the middle-coronal dentin surfaces.The dentin surfaces were then treated with Single Bond 2 and made a core build-up.According to random digits table,the bonding specimens were divided into four groups (n =10)as follows:immediate control group,aging group with thermocycling for 5 000 times,aging group with artificial saliva storage for 6 months and aging group with bacteria aggression for 14 days.The specimens in each group were then subjected to microtensile bond strengths (μTBS) testing and nanoleakage evaluation respectively.Results After aging treatments,the three aging groups showed significantly lower μTBS than the immediate control group[(44.24 ± 12.75) MPa,P ＜0.05].The immediate control group also showed the lowest value of nanoleakage.The μTBS of aging group with bacteria aggression[(25.53 ± 7.39) MPa] was significantly lower than those of the other aging groups with artificial saliva storage [(29.72 ± 6.51) MPa] and thermocycling [(31.92 ± 11.87) MPa,P ＜ 0.05].There were no differences in the nanoleakage values among the three aging groups(P ＞0.05).Conclusions All the aging treatments with artificial saliva storage,thermocycling and bacteria aggression could accelerate the degradation of bonding interfaces between an etch-and-rinse adhesive and dentin.Bacteria aggression showed the most impairing effect on the stability of resin-dentin bonds.
