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KMID : 0372919970180010001
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Journal of Biomedical Engineering Research
1997 Volume.18 No. 1 p.1 ~ p.8
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The Effect or Resin ann ruler Type on the compressive strength of Light-activated Composite Resins
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Abstract
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This study was performed to evaluate the effect of resin and filler type on the compressive strength of light-activated composite resins. Experimental composite resins containing either amorphous spherical silica or crushed quartz in two matrix resins of BisGMA/TEGDMA and UTMA/TEGDMA were prepared and the specimens of 3 m in diameter and 6m in length were made. Compressive test was subjected to a crosshead speed of 0.5 mm/min, and the fracture surFaces were examined by SEM. The compressive strength of UTMA-based composite resin was higher than that of BisGMA-based composite resin. The loading rate of spherical silica was higher than that of crushed silica when the size dis- tribution of fillers was same. Strength decrease of Bis-GMA-based composite resin was severer than that of UTMA-based composite resin in a 37’’’’c water environment. Fracture surface showed that the composite resin failure developed along the matrix resin and the filler/resin interface region.
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KEYWORD
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