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15. EPMA observation between dentin and resin interfaces. Part 1. Comparison of wet and dry technique after short-term stored in water.

Author

Han L, Okamoto A, Ishikawa K, and Iwaku M

Subjects
Acid Etching, Dental, Calcium analysis, Composite Resins chemistry, Dental Cavity Preparation classification, Dental Leakage classification, Desiccation, Electron Probe Microanalysis, Humans, Microscopy, Electron, Scanning, Nitrogen analysis, Silver analysis, Surface Properties, Time Factors, Water chemistry, Dental Bonding methods, Dentin ultrastructure, Dentin-Bonding Agents chemistry
Abstract

The study was to evaluate the marginal leakage of wet or dry dentin condition after restoration on short-term. In the study we used Photobond adhesive system and Single Bond adhesive system. The specimens were prepared from premolars. A class V cavity was prepared at the CEJ with a high-speed hand piece and #010 round diamond point. The cavity's walls and floors were etched with phosphoric acids of the test materials by wet and dry bonding techniques. The specimens were cross-sectioned longitudinally through the center of the cavities with a low speed diamond micro-cutter and polished with carbide paper (#600-1200) after storage in distilled water for 1 day, and silver nitrate staining. Specimens were viewed with EPMA for elemental distribution of calcium, nitrogen and silver on the resin-dentin interface. The uptake of silver particles was less in samples treated with the wet-bonding technique when compared with dry-bonding technique. This in vitro study showed that bonding technique is important in establishing a seal along the restoration margins to control marginal leakage.

Published
2003
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