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KMID : 0362219930200010067
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Journal of The Korean Research Society for Dental Materials
1993 Volume.20 No. 1 p.67 ~ p.90
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Studies on the Poly merization Contraction Forces and the Bonding Behavior of Composite Resins -PART 1. Polymerization Contraction Forces-
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최부병
박남수/최대균/우이형/임호남
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Abstract
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The polymerization contraction forces has a relationship with the bond strength between restoration andbonded surface, the failure of bond can be occured. This study was designed to forces could induce the bond iailure of composite resins to
enamel
or
dentin. Low capacity load cell using strain gauge were prepared and used as a measurement system for polymerization contraction forces. Oxidized alloy surfaces, enamel surfaces and entin surfaces were used as bonded surface. Measurements of the
polymerization contraction forces were done for 1 hour, and a stress at 1 hour after was recorded as a polymerization contraction force. It was considered as a bond failure that the polymerization contraction contraction forces increased by the
time.
The following conclusions were drawn :
1. Polymerization contraction foraction forces of composite resins were decreased by the increase of filler contents.
2. Polymerization contraction forces were increased at thickened resin specimens, but it was not significant at over two millimeter thickness.
3. Bond strength of composite resins to the acld etched enamel surfaces exceeded the poymerization contraction forces and the reduced polymerization contraction forces due to the bond failure were not confirmed.
4. Failure of bond and reduced polymerization contraction forces occured on dentin.
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