Comparison of the microhardness and morphology of five different retrograde filling materials in aqueous and dry conditions

Scanning
E M RhimS H Park

Abstract

The purpose of the present study was to compare the effect of dry and aqueous conditions on the surface morphology and surface hardness of five materials 24 h after being used as fillings without initial setting time in dry condition. The five materials were ProRoot mineral trioxide aggregate (MTA), super EBA, intermediate restorative materials (IRM), zinc oxide eugenol (ZOE), and amalgam. To evaluate microhardness, the five materials were submitted to the Vickers microhardness (VHN) test. We used a scanning electron microscope (Steroscan 440, Leica Cambridge, England) to observe the microstructural morphology of the five different materials. The VHN of MTA soaked in water showed five times lower than that of MTA soaked in dry condition. On the other hand, super EBA was less influenced by the medium of storage compared with the other materials. Scanning electron microscope (SEM) images showed the similar results with microhardness tests. The surface of MTA soaked in water appeared to be unstable compared with that of dry condition while super EBA showed similarly smooth surface in both conditions (aqueous and dry). In conclusion, the physical property of MTA is reduced after storage in water; however, super EBA is less influenc...Continue Reading

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Citations

Mar 26, 2013·Journal of Endodontics·Yoorina ChoiKyung-San Min
Oct 6, 2015·Journal of Investigative and Clinical Dentistry·Alaa E DawoodDavid J Manton
Jul 23, 2015·Brazilian Dental Journal·Jorge Henrique Stefaneli MarquesManoel Damião Sousa-Neto

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