Dentin bond optimization using the dimethyl sulfoxide-wet bonding strategy : A 2-year in vitro study

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Scarabello Stape , T H , Tjaderhane , L , Tezvergil-Mutluay , A , Fujiwara Yanikian , C R , Szesz , A L , Loguercio , A D & Marcondes Martins , L R 2016 , ' Dentin bond optimization using the dimethyl sulfoxide-wet bonding strategy : A 2-year in vitro study ' , Dental Materials , vol. 32 , no. 12 , pp. 1472-1481 .

Title: Dentin bond optimization using the dimethyl sulfoxide-wet bonding strategy : A 2-year in vitro study
Author: Scarabello Stape, Thiago Henrique; Tjaderhane, Leo; Tezvergil-Mutluay, Arzu; Fujiwara Yanikian, Cristiane Rumi; Szesz, Anna Luiza; Loguercio, Alessandro Dourado; Marcondes Martins, Luis Roberto
Contributor organization: Clinicum
Department of Oral and Maxillofacial Diseases
Date: 2016-12
Language: eng
Number of pages: 10
Belongs to series: Dental Materials
ISSN: 0109-5641
Abstract: Objective. This study evaluated a new approach, named dimethyl sulfoxide (DMSO)-wet bonding, to produce more desirable long-term prospects for the ultrafine interactions between synthetic polymeric biomaterials and the inherently hydrated dentin substrate. Methods. Sound third molars were randomly restored with/without DMSO pretreatment using a total-etch (Scocthbond Multipurpose: SBMP) and a self-etch (Clearfil SE Bond: CF) adhesive systems. Restored teeth (n = 10)/group were sectioned into sticks and submitted to different analyses: micro-Raman determined the degree of conversion inside the hybrid layer (DC); resin dentin microtensile bond strength and fracture pattern analysis at 24 h, 1 year and 2 years of aging; and nanoleakage evaluation at 24h and 2 years. Results. DMSO-wet bonding produced significantly higher 24 h bond strengths for SBMP that were sustained over the two-year period, with significantly less adhesive failures. Similarly, DMSO-treated CF samples presented significantly higher bond strength than untreated samples at two years. Both adhesives had significant less adhesive failures at 2 years with DMSO. DMSO had no effect on DC of SBMP, but significantly increased the DC of CE DMSO-treated SBMP samples presented reduced silver uptake compared to untreated samples after aging. Significance. Biomodification of the dentin substrate by the proposed strategy using DMSO is a suitable approach to produce more durable hybrid layers with superior ability to withstand hydrolytic degradation over time. Although the active role of DMSO on dentin bond improvement may vary according to monomer composition, its use seems to be effective on both self-etch and etch-and-rinse bonding mechanisms. (C) 2016 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Subject: DMSO
Dentin bonding
Bond strength
Degree of conversion
Micro Raman
Bond durability
Hybrid layer
313 Dentistry
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: publishedVersion

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