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KMID : 0362320070320060542
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Journal of Korean Academy of Operative Dentistry
2007 Volume.32 No. 6 p.542 ~ p.549
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Surface roughness and color stability of various composite resins
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Lee Sung-Yi
Kim Hyeon-Cheol
Hur Bock
Park Jeong-Kil
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Abstract
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The purpose of this study was to evaluate the difference in the surface roughness after polishing and to evaluate the difference in color stability after immersion in a dye solution among four types of composite resin materials. Four light-polymerized composite resins(Shade A2) with different sized filler content(a nanofilled, a hybrid, a microfilled, a flowble) were used. Average surface roughness (Ra) was measured with a surface roughness tester (Surftest Formtracer) before and after polishing with aluminum oxide abrasive discs(Super-Snap). Color of specimens before and after staining with 2% methylene blue solution were measured using spectrophotometer(CM-3700d) with SCI geometries. The results of Ra and {Delta}E were analyzed by one-way analysis of variance(ANOVA), a Scheffe multiple comparison test and Student t-test(p=0.05). After polishing, Ra values were decreased regardless of type of composite resins. In surface roughness after polishing and color stability after staining, nanofilled composite resin was not different with other composite resins except flowable resins.
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KEYWORD
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Nanofilled, Surface roughness, Color stability, Filler size, Filler contents, Polishing
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