Effect of adjunctive application of epigallocatechin-3-gallate and ethanol-wet bonding on adhesive-dentin bonds

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• 作者：Hongye Yang^a ; ¹ ; Jingmei Guo^a ; ¹ ; Donglai Deng^a ; Zhiyong Chen^b ; Cui Huang^a ; ^{huangcui@whu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Dentin ; Adhesive ; Epigallocatechin-3-gallate ; Ethanol&ndash ; wet bonding
• 刊名：Journal of Dentistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：44
• 期：Complete
• 页码：44-49
• 全文大小：3002 K

文摘

To determine the effect of the combined use of epigallocatechin-3-gallate (EGCG) and ethanol–wet bonding (EWB) on resin–dentin bonds.

Methods

Sixty molars were sectioned, polished, and randomly divided into six groups (n = 10) according to the following pretreatments: group 1, water–wet bonding (WWB); group 2, WWB with 0.02% (w/v) EGCG; group 3, WWB with 0.1% EGCG; group 4, EWB; group 5, EWB with 0.02% EGCG; and group 6, EWB with 0.1% EGCG. An etch-and-rinse adhesive was then used, followed by the resin composites building. The microtensile bond strength (MTBS), failure modes and interfacial nanoleakage were separately determined after 24 h water storage or 10,000 runs of thermocycling.

Results

Both pretreatment method (P < 0.05) and thermocycling (P < 0.05) significantly influenced bond strength and nanoleakage. Irrespective of thermocycling, the 0.02% EGCG/ethanol (group 5) pretreated adhesive–dentin interfaces showed higher MTBS than the control group (P < 0.05). Nanoleakage expression of all groups increased after thermocycling (P < 0.05) except group 5. Adhesive failure was the main fracture pattern in all groups.

Conclusion

This study showed that pretreatment with 0.02% EGCG/ethanol solutions can effectively improve immediate bond strength and bond stability of etch-and-rinse adhesives on dentin.

Clinical significance

The adjunctive application of EGCG and EWB provides a new strategy for dentists to obtain the desired bond effectiveness during adhesive restoration in clinical practice.