Reversal of Compromised Bonding in Bleached Enamel

Author:

Lai S.C.N.1234,Tay F.R.1234,Cheung G.S.P.1234,Mak Y.F.1234,Carvalho R.M.1234,Wei S.H.Y.1234,Toledano M.1234,Osorio R.1234,Pashley D.H.1234

Affiliation:

1. Conservative Dentistry, Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Hong Kong, SAR, China;

2. Bauru School of Dentistry, University of São Paulo, Brazil;

3. Department of Dental Materials, University of Granada, Spain; and

4. Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, GA, USA;

Abstract

Oxygen inhibits polymerization of resin-based materials. We hypothesized that compromised bonding to bleached enamel can be reversed with sodium ascorbate, an anti-oxidant. Sandblasted human enamel specimens were treated with distilled water (control) and 10% carbamide peroxide gel with or without further treatment with 10% sodium ascorbate. They were bonded with Single Bond (3M-ESPE) or Prime&Bond NT (Dentsply DeTrey) and restored with a composite. Specimens were prepared for microtensile bond testing and transmission electron microscopy after immersion in ammoniacal silver nitrate for nanoleakage evaluation. Bond strengths of both adhesives were reduced after bleaching but were reversed following sodium ascorbate treatment (P < 0.001). Resin-enamel interfaces in bleached enamel exhibited more extensive nanoleakage in the form of isolated silver grains and bubble-like silver deposits. Reduction of resin-enamel bond strength in bleached etched enamel is likely to be caused by a delayed release of oxygen that affects the polymerization of resin components.

Publisher

SAGE Publications

Subject

General Dentistry

Reference29 articles.

1. Leaching of hydrogen peroxide from bleached bovine enamel

2. Cavalli V, Reis AF, Giannini M, Ambrosano GM -2001- The effect of elapsed time following bleaching on enamel bond strength of resin composite. Oper Dent 26:597–602.

3. Cimilli H, Pameijer CH -2001- Effect of carbamide peroxide bleaching agents on the physical properties and chemical composition of enamel. Am J Dent 14:63–66.

4. The effects of peroxide bleaching on composite to enamel bond strength

5. Ernst CP, Marroquin BB, Willershausen-Zonnchen B -1996- Effects of hydrogen peroxide-containing bleaching agents on the morphology of human enamel. Quintessence Int 27:53–56.

Cited by 171 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3