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BioMed Research International
Volume 2018, Article ID 9189354, 9 pages
Research Article

Influence of Polishing Methods on the Bonding Effectiveness and Durability of Different Resin Cements to Dentin

Department of Prosthodontics, Nanjing Stomatological Hospital, Nanjing University Medical School, No. 30 Zhongyang Road, Nanjing, Jiangsu 210008, China

Correspondence should be addressed to Xiangfeng Meng; nc.ude.ujn@raosgnem

Received 2 August 2017; Revised 14 November 2017; Accepted 4 December 2017; Published 28 February 2018

Academic Editor: Ali I. Abdalla

Copyright © 2018 Lingyan Ren et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The purpose of this study was to investigate the impact of polishing methods on the bonding effectiveness and durability of different resin cements to dentin. The dentin surfaces were either treated with a fine-grit diamond bur (polishing A) or further polished by polishing disks (polishing B), and then they were bonded with any one of the three resin cements, namely, etch-and-rinse, self-etch, and self-adhesive resin cements. After 24-hour or 2-year water storage, a microtensile bond strength (μTBS) test was performed. A scanning electron microscope (SEM) was used to observe the morphology of the smear layer as well as the resin-dentin bonding interface. The results indicated that a thinner smear layer thickness was created by polishing B compared with polishing A. Although self-etch and self-adhesive resin cements achieved a relatively high primary bond strength before water degradation, etch-and-rinse resin cement obtained a stable bond strength during water degradation. The application of an additional polishing procedure could improve the bond strength of self-etch and self-adhesive resin cements.