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KMID : 1035320170440020129
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Korean Society for Dental Materials
2017 Volume.44 No. 2 p.129 ~ p.139
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Effect of layer combinations with nanocomposite and low-shrinkage composite resins on their color and mechanical properties
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park Wan-Ky
Choi An-Na
Son Sung-Ae
Kwon Yong-Hoon
Kang Eun-Sook
Park Jeong-Kil
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Abstract
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This study investigated the colors and mechanical properties of layered dental composites. Four nanocomposite resins (Aelite LS, Grandio, Tetric EvoCeram, Filtek Z350XT) and a silorane-based composite resin (P90) were used for overlying and underlying materials, respectively, with different thickness combinations. Colors, translucency parameter (TP), flexural and compressive properties were evaluated. All tested specimens had different color coordinates, although all were of A3 shade. Color coordinates and TP values of layered specimens better matched those of the corresponding overlying product as the thickness of the overlying product was increased. High TP values were related with high b* value differences between specimens (p<0.05). Both flexural strength and modulus, compressive strength and modulus of layered specimens with different thickness combinations were mostly lower than those of the corresponding overlying products, respectively, in their non-layered state.
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KEYWORD
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Color, Layered specimens, Mechanical properties, low-shrinkage composite resin, Nanocomposite resins
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