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http://dx.doi.org/10.5395/JKACD.2004.29.4.346

MEASUREMENTS OF SHRINKAGE STRESS AND REDUCTION OF INTER-CUSPAL DISTANCE IN MAXILLARY PREMOLARS RESULTING FROM POLYMERIZATION OF COMPOSITES AND COMPOMERS  

Lee, Soon-Young (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Park, Sung-Ho (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Publication Information
Restorative Dentistry and Endodontics / v.29, no.4, 2004 , pp. 346-352 More about this Journal
Abstract
The purpose of present study was to evaluate the polymerization shrinkage stress and cuspal deflection in maxillary premolars resulting from polymerization shrinkage of composites and compomers. Composites and compomers which were used in this study were as follows: Dyract AP, Z100, Surefil. Pyramid, Synergy Compact, Heliomolar, Heliomolar HB, and Compoglass F. For measuring of polymerization shrinkage stress, Stress measuring machine (R&B, Daejon, Korea) was used. One-way ANOVA analysis with Duncan's multiple comparison test were used to determine significant differences between the materials. For measuring of cuspal deflection of tooth, MOD cavities were prepared in 10 extracted maxillary premolars. And reduction of intercuspal distance was measured by strain measuring machine (R&B, Daejon, Korea) One-way ANOVA analysis with Turkey test were used to determine significant differences between the materials. Polymerization shrinkage stress is $\mathbb{\ulcorner}$Heliomolar, Z100, Pyramid < Synergy Compact Compoglass F < Dyract AP < Heliomolr HB, surefil$\mathbb{\lrcorner}$ (P < 0.05). And cuspal delfelction is $\mathbb{\ulcorner}$Z100, Heliomolar, Heliomolar HB, Synergy Compact Surefil. < Compoglass F < Pyramid, Dyract AP$\mathbb{\lrcorner}$ (P < 0.05). Measurements of ploymerization shrinkage stress and those of cuspal deflection of the teeth was different. There is no correlation between polymerization shrinkage stress and cuspal deflection of the teeth(p > 0.05).
Keywords
Polymerization shrinkage stress; Cuspal deflection; Composite resin; Compomer;
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Times Cited By KSCI : 1  (Citation Analysis)
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