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KMID : 0378419880080010067
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Dental Focus
1988 Volume.8 No. 1 p.67 ~ p.73
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A COMPARATIVE STUDY OF BOND STRENTHS OF ADHESIVE CAST RESTORATIONS USING DIFFERENT DESIGNS AND BONDING AGENTS
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Abstract
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The purpose of this study was to compare the bond strengths between Adhesion Bridge designed by Yamashita and Maryland Bridge designed by Thompson.
For this study, 20 extracted upper central incisors and 20 extracted upper premolars were embedded in acrylic resin blocks. The specimens were divided into 2 groups of incisors and 2 groups of premolars as fol´ows: A-I of 10 incisors, AT of 10 premolars, M-I of 10 incisors, M-P of 10 premolars.
The restorations in Group A-I and AT were bonded with Panavia EX after air-braded with 50 micron aluminum oxide and treated with EZ-oxisor.
The restorations in Group M-I and M-P were bonded with M.B.A. system after electrolytically etched with EL TROKOR.
Tensile bond strengths were evaluated using an AUTOGRAPH at a crosshead speed of 0.5㎜/min.
The results were as follows;
1. Bond strengths between Group A-I and Group M-I did not demonstrate statistical differences.
2. Group A-P exhibited more bond strength than Group M-P. Statistics showed that there were significant differences between them.
3. The results suggest that Adhesion Bridge can be more successful retainer than Maryland Bridge for premolars.
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KEYWORD
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