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http://dx.doi.org/10.5933/JKAPD.2016.43.4.427

Comparison of Mechanical Properties between Bulk-fill and Conventional Composite Resin  

Seok, Ujeong (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Jongbin (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Kiseob (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Jongsoo (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.43, no.4, 2016 , pp. 427-434 More about this Journal
Abstract
The aim of this study was to compare the mechanical properties of high viscosity bulk-fill resin composites, $Filtek^{TM}$ Bulk Fill Posterior Restorative (FBF) and $Tetric^{(R)}$ N-Ceram Bulk Fill (TBF), with conventional composite ($Filtek^{TM}$ Z-350 XT, Z-350). The Vickers hardness test which indicates the degree of conversion was performed and the dye penetration test was performed to measure the microleakage which indicates polymerization shrinkage amount. To minimize experimental error, the standardized 3D-printed molds and the bovine teeth were used. Obtained data were analyzed by the Kruskal-Wallis test and Mann-Whitney test with the confidence interval of 95%. In the microhardness test within 1 hour of polymerization, lower surface of FBF and TBF showed significantly lower value than that of Z-350 (p < 0.05). But after 24 hours, the microhardness of FBF had increased and showed no significant difference with Z-350 (p > 0.05). In top and 2 mm depth surface, mean microhardness values were in the following order: Z-350 > FBF > TBF (p < 0.05). The mean microleakage value of TBF was significantly lower than others (p < 0.05). For clinical application of bulk-fill resin composites, caution for applying masticatory forces during 24 hours after polymerization is advised and further studies to decrease microleakage should be conducted.
Keywords
Bulk-fill resin; Microhardness; Microleakage; 3D-printed molds; Bovine teeth;
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Times Cited By KSCI : 1  (Citation Analysis)
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