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KMID : 0362219930200020187
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Journal of The Korean Research Society for Dental Materials
1993 Volume.20 No. 2 p.187 ~ p.0
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Studies on the Polymerization Contraction forces and the Bonding Behavior of composite resins(Part 3. Marginal Leakage and Gaps)
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최부병
박남수/최대균/우이형/임호남
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Abstract
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This study was designed to confirm the influence of the polymerization contraction stress to the marginal leakage and gaps of resin restorations. Ten kinds of sxperimental composite resins were prepared with varing the filler contents to display
the
different polymerization conrtraction stress. A cavitywith enamel and dentin margins were prepared on the cervical area of human tooth. Enamel margins were etched with 37% phosphoric acid for 1 minute. Experimental composite resins were filled
into
the
cavities and immersed in water bath of 37 ±1℃ for 24 hours, and then immersed into dye solution. Tooth were cut through the restrotion, and the infiltration of dye was observed. Marginal gaps were measured on the light microscope with 100
magnifications.
@ES The following conclusions were drawn:
@EN 1. Polymerization contraction stress and gaps showed the corelation between them, gaps were decreased by increase of filler contents.
2. There was not exist the relationships between polymerization contraction stress and marginal leakage.
3. Marginal leakage and gaps were larger at dentinal margins than enamel margins.
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KEYWORD
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