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http://dx.doi.org/10.5933/JKAPD.2014.41.2.125

Effect of Various Surface Treatment Methods on Shear Bond Strength of Orthodontic Brackets to Aged Composite Resin  

Park, Jongcheol (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Park, Howon (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Lee, Juhyun (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Seo, Hyunwoo (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.41, no.2, 2014 , pp. 125-133 More about this Journal
Abstract
The purpose of this study was to investigate the effect of various surface treatment methods on the shear bond strength of orthodontic brackets in vitro. Ninety six specimens, 6 mm in diameter and 5 mm in height, were made with composite resin ($Filtek^{TM}$ Z350 XT, 3M ESPE, USA) and treated with an aging procedure. After aging, the specimens were randomly separated in six groups: (1) control with no surface treatment, (2) 37% phosphoric acid gel, (3) 4% hydrofluoric acid gel, (4) sodium bicarbonate particle abrasion, (5) diamond bur, and (6) 1 W carbon dioxide laser for 5s. The metal brackets were bonded to composite surfaces by means of an orthodontic adhesive (Transbond XT, 3M Unitek, USA). Shear bond strength values were evaluated with a universal testing machine (R&B Inc., Korea). Analysis of variance showed a significant difference between the groups. Group 5 had the highest mean shear bond strength (11.9 MPa), followed by group 6 (11.1 MPa). Among the experimental groups, group 2 resulted in the weakest mean shear bond strength (5.22 MPa). The results of this study suggest that the repair shear bond strength of the aged composite resin was acceptable by surface treatment with a carbon dioxide laser.
Keywords
Carbon dioxide laser; Surface treatment; Shear bond strength; Orthodontic bracket;
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Times Cited By KSCI : 2  (Citation Analysis)
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