Effect of chemical interaction on the bonding strengths of self-etching adhesives to deproteinised dentine. Issue 8 (August 2015)

• Record Type: Journal Article
• Authors: Zhou, Liqun; Wang, Yake; Yang, HongYe; Guo, Jinxin; Tay, Franklin R.; Huang, Cui
• Is Part Of: Journal of dentistry. Volume 43:Issue 8(2015:Aug.)
• Page Start: 973
• Page End: 980
• Publication Date: 2015-08
• Subjects: Dentistry -- Periodicals; Dentistry -- Periodicals; Dentisterie -- Périodiques; Electronic journals; 617.6005
• DOI: 10.1016/j.jdent.2015.05.010
• Languages: English
• ISSNs: 0300-5712

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <title id="sect0010">Objectives</title> <p id="spar0005">The present study examined (1) the chemical interaction between three self-etching adhesives and sodium hypochlorite (NaOCl)-deproteinised dentine, and (2) the influence of NaOCl treatment on bond strength of self-etching adhesives with/without adhesive functional monomers to dentine.</p> </sec> <sec> <title id="sect0015">Methods</title> <p id="spar0010">Caries-free dentine disks (control) and those treated with 5.25% NaOCl for 60 s were prepared. Xeno V (no functional monomers), G-Bond (containing 4-MET) or S3 Bond (containing 10-MDP) were applied to the NaOCl-treated dentine and either left without further treatment, or rinsed with 100% ethanol or distilled water.</p> <p id="spar0015">Attenuated total reflection (ATR) spectroscopy and field-emission scanning electron microscopy (FE-SEM) were used to evaluate the affinity of functional monomers with deproteinised dentine. Chemical interaction between the functional monomers and deproteinised dentine was evaluated using thin-film X-ray diffraction (TF-XRD). Microtensile bond strength (MTBS) was used to evaluate the mechanical property of the adhesives, either immediately or after thermo-cycling (5–55 °C) for 10, 000 cycles.</p> </sec> <sec> <title id="sect0020">Results</title> <p id="spar0020">According to the ATR and FE-SEM results, G-Bond and S3 Bond showed stronger affinity to deproteinised dentine than Xeno V even after rinsing with water. TF-XRD showed that chemical interaction between S3 Bond and deproteinised dentine occurred by formation of 10-MDP–Ca salt. Both deproteinisation and thermo-cycling adversely affected the MTBS of Xeno V (<italic>P</italic> < 0.05) but deproteinisation had no significant influence on S3 Bond.</p> </sec> <sec> <title id="sect0025">Conclusions</title> <p id="spar0025">When bonding to NaOCl-treated dentine, self-etch adhesives containing functional monomers (10-MDP) can maintain immediate and aged bond strengths after 10, 000 thermal cycles.</p> </sec> </abstract>