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KMID : 0362219920190020209
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Journal of The Korean Research Society for Dental Materials
1992 Volume.19 No. 2 p.209 ~ p.229
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STUDIES ON THE DEVELOPMENTS OF EXPERIMENTAL RESTORATIVE COMPOSITE RESING FOR DENTAL CARIES AND ITS COMPATIBILITY TO HUMAN TOOTH SUBSTRATE
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Abstract
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The purpose of this study was the evaluations of bonding behavior of experimental resins (KM-22) to acid etched enamel and surface treated dentin using shear bond strength and microleakage test. Enamel surfaces etched with various concentrated
phosphoric acid and dentin surface treated with ferric compound were bonded with resin materials and used to measure the shear bond strength between them To test the microleakage, tooth etched and filled with resins were cross cut and observed
the
degree of penetration of dye into interfaces.
@ES Following conclusions were drawn:
@EN 1. All of phosphoric acid diluted with various concentration etching the enamel surfaces increased the shear bond strength of experimental resins to enamel, and acid concentrations over 30% did not make the significant higher bond strength of
resins
to etched enamel with it.
2. Some pretreatment of dentin smear layers increased the shear bond strength between dentin and resins.
3. Substantial leakage occurs around unetched composite restorations. And the filler added experimental resins showed the decresed penetration of dye.
4. From dentin surfaces treated with EDTA, removal of smear layers and exposure of dentinal tubules were confirmed, but dentinal tubules of ferric oxalate treated dentin were occluded with some crystals regarded as precipitates.
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KEYWORD
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