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KMID : 0358920000270030444
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Journal of the Korean Academy of Pedodontics
2000 Volume.27 No. 3 p.444 ~ p.456
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Shear bond strength of "one-bottle adhesive" system in primary dentin
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Kim Jong-Bin
Kim Jong-Soo
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Abstract
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To test the shear bond strength of a new "one-bottle adhesive" system to primary dentin two commercially available one-bottle adhesives(Prime & Bond NT, Single bond) and conventional three step system(Scotchbond Multi-Purpose Plus) were included for comparison. And We observe the interfacial morphology by scanning electron microscope.
90 primary molar teeth were embedded in acrylic and buccal and lingual surface were polished to 320 grit to create standardized dentin surface for testing. After bonding of composite resin to sample surfaces according to the manufacturer’s direction and 1000 times thermocycling in dwell time 30 second, Shear bond strengths of adhesives to dentin were determined using universal testing machine and analyzed by ANOVA test. Another groups of specimens were treated by hydrochloric acid to secure the resin only and those tags were evaluated under SEM fur their length and forms and the morphology of the bonding sites were also observed
The result are as follows
1 Group I(Prime & Bond NT) showed higher shear bond strength than groupⅡ(Single Bond) and Ⅲ(Scotchbond Multi Purpose Plus) but no statistically significant difference was founded between groups(p〉0.05).
2. Relating long resin tags of 70-120㎛ were observed in samples of all groups under SEM. We could observed hybrid layer, resin tag and many lateral branches in every group. But, we observed in groupⅢ rare lateral branched than other two group and discontinuous hybrid layer.
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KEYWORD
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One-bottle adhesive, Primary dentin, Shear bond Strength, Scanning electron microscope
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