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KMID : 1035320140410040273
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Korean Society for Dental Materials
2014 Volume.41 No. 4 p.273 ~ p.279
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Investigation of polymerization of methacrylate-based composite resins those belong to different categories
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Lee Ju-Hee
Ro Jung-Hoon
Seol Hyo-Joung
Kim Hyung-Il
Kwon Yong-Hoon
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Abstract
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The present study investigated the polymerization of composite resins which belong to different categories. Each four different composite resins (low shrinkage, nanohybrid, microhybrid, and flowable resins) from three different manufacturers were chosen and light cured. Through the study, polymerization shrinkage and flexural properties were evaluated. Regardless of product and manufacturer, low shrinkage and flowable resins showed the lowest (7.7-12.3 μm) and highest (26.2-35.4 μm) polymerization shrinkage, respectively. The shrinkage difference between nanohybrid and microhybrid products was low. The flexural properties (strength and modulus) from products of different categories and from products of the same manufacturer had no consistency. All these values showed inconsistently changing pattern after immersion in distilled water. The tested composite resins belong to different categories but products of the same manufacturer and composite resins belong to the same category but products of different manufacturers had inconsistently different flexural properties.
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KEYWORD
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Composite resin, Polymerization shrinkage, Flexural properties
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