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http://dx.doi.org/10.5395/JKACD.2009.34.1.042

THE EFFECT OF PRIMING ETCHED DENTIN WITH SOLVENT ON THE MICROTENSILE BOND STRENGTH OF HYDROPHOBIC DENTIN ADHESIVE  

Park, Eun-Sook (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Bae, Ji-Hyun (Department of Conservative Dentistry, Seoul National University Bundang Hospital)
Kim, Jong-Soon (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Kim, Jae-Hoon (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Lee, In-Bog (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Kim, Chang-Keun (Department of Chemical Engineering, Choongang University)
Son, Ho-Hyun (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Cho, Byeong-Hoon (Department of Conservative Dentistry, School of Dentistry, Seoul National University)
Publication Information
Restorative Dentistry and Endodontics / v.34, no.1, 2009 , pp. 42-50 More about this Journal
Abstract
Deterioration of long-term dentin adhesion durability is thought to occur by hydrolytic degradation within hydrophilic domains of the adhesive and hybrid layers. This study investigated the hypothesis that priming the collagen network with an organic solvent displace water without collapse and thereby obtain good bond strength with an adhesive made of hydrophobic monomers and organic solvents. Three experimental adhesives were prepared by dissolving two hydrophobic monomers, bisphenol-A-glycidylmethacrylate (Bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA), into acetone, ethanol or methanol. After an etching and rinsing procedure, the adhesives were applied onto either wet dentin surfaces (wet bonding) or dentin surfaces primed with the same solvent (solvent-primed bonding). Microtensile bond strength (MTBS) was measured at 48 hrs, 1 month and after 10,000 times of thermocycles. The bonded interfaces were evaluated using a scanning electron microscope (SEM). Regardless of bonding protocols, well-developed hybrid layers were observed at the bonded interface in most specimens. The highest mean MTBS was observed in the adhesive containing ethanol at 48 hrs. With solvent-primed bonding, increased MTBS tendencies were seen with thermo cycling in the adhesives containing ethanol or methanol. However, in the case of wet bonding, no increase in MTBS was observed with aging.
Keywords
Dentin adhesive; Durability; Solvent priming; Hydrophobic monomer; Microtensile bond strength;
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Times Cited By KSCI : 3  (Citation Analysis)
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