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KMID : 0362319930180020423
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Journal of Korean Academy of Operative Dentistry
1993 Volume.18 No. 2 p.423 ~ p.430
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Effect of cupric and ferric ions on bonding of MMA/TBBO resin to dentin
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Abstract
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The purpose of this study was to investigate the effect of cupric and ferric ions contained in phosphoric acid solution as a pretreatment solution on bonding of MMA/TBBO resin to dentin. Each of 1% and 3% ferric chloride, cupric chloride, cupric
sulfate, and cupric nitrate was mixed into 10% phosphoric acid solution and pretreated dentin surface of bovine anterior teeth for 30 seconds followed by water rinse and dry. Tensile bond strength was determined after bonding of pretreated dentin
with
MMA/TBBO resin by use of brush-on technique and storing for 24 hours in 37℃ distilled water. The amount of cupric ions adsorbed on pretreated dentin surface was detected by Wave-Dispersion X-ray microanalyzer for different groups of each
pretreatment
solution containing cupric salts.
The pretreatment with cupric ions contained in 10% phosphoric acid solution was effective to increase bonding strength of MMA/TBBO resin to dentin but not in case of ferric ions. The pretreatment with 3% cupric chloride and cupric nitrate both
enhanced
significant increase in bonding strength compared to the control group of 10% phosphoric acid solution(p<0.05). Cupric ions measured in pretreated dentin surface was higher in 3% cupric chloride group than in 1% cupric chloride group, but
couldn't
find
distinct relationship from the results of this experiment between the amount of adsorbed cupric ions according to the kind of cupric salts and the bonding strength value.
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KEYWORD
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