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http://dx.doi.org/10.5395/JKACD.2005.30.2.112

MICROLEAKAGE OF THE CLASS V CAVITY ACCORDING TO RESTORATION SITE AND CAVITY SIZE USING SEM AND THREE-DIMENSIONAL RECONSTRUCTION TECHNIQUES  

Yang, In-Seo (Department of Conservative Dentistry, School of Dentistry, Dankook University)
Shin, Dong-Hoon (Department of Conservative Dentistry, School of Dentistry, Dankook University)
Publication Information
Restorative Dentistry and Endodontics / v.30, no.2, 2005 , pp. 112-120 More about this Journal
Abstract
This study was done to evaluate whether there were any differences in microleakage of class V composite restorations according to restoration site and cavity size. Total sixty-four restorations were made in molar teeth using Esthet-X. Small ($2\;{\times}\;2\;{\times}\;1.5\;mm$) and large ($4{\times}2{\times}1.5\;mm$) restorations were made at the buccal/lingual surface and the proximal surface each. After 1,000 times of thermocycling ($5^{\circ}\;-\;55^{\circ}C$), resin replica was made and the percentage of marginal gap to the whole periphery of the restoration was estimated from SEM evaluation. Thermocycled tooth was dye penetrated with $50\%$ silver nitrate solution. After imbedding in an auto-curing resin, it was serially ground with a thickness of 0.25 mm. Volumetric microleakage was estimated after reconstructing three dimensionally. Two-way ANOVA and independent T-test for dye volume, Mann-Whitney U test for the percentage of marginal gap, Spearman's rho test for the relationship between two techniques were used, The results were as follows : 1. The site and size of the restoration affected on the microleakage of restoration. Namely, much more leakage was seen in the proximal and the large restorations rather than the buccal/lingual and the small restorations. 2. Close relationship was found between two techniques (Correlation coefficient = 0.614/ P = 0.000). Within the limits of this study, it was noted that proximal and the large restorations leaked more than buccal/lingual and the small restorations. Therefore, it should be strictly recommended large exposure of margins should be avoided by reducing unnecessary tooth reduction.
Keywords
Microleakage; Restoration site; Cavity size; Three-dimensional reconstruction; SEM;
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Times Cited By KSCI : 1  (Citation Analysis)
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