Microstructural features of dentin and dental enamel after interaction with etching gel contained silver
This study is devoted to metallographic examination of the "dentin-plumb" and "enamel-plumb" boundaries in teeth, which have been affected by the secondary caries, after processing with a help of etching gels, one of which contained silver. The samples were cut from teeth that were extracted from patients aged 18 - 60 years old according to the Ethic Protocol of the Ural State Medical University. The filling was made with the adhesive systems of IV and V generations, flowable and packing composites were chosen as filling materials. The samples for metallographic study were cut perpendicularly to the main axis of a tooth. Their surfaces were mechanically abraded and etched in concentrated phosphoric acid. The observations were carried out on light and scanning electron microscopes. The metallographic examination of the "dentin-plumb" and "enamel-plumb" boundaries has shown that in all cases the boundaries have not visible damages. This fact is the basis for conclusion that etching gel contained silver does not decrease the cohesive strength of the boundaries.