Effect of Storage Conditions on Biaxial Flexure Strengths of MTA
The aim of this study was to determine the biaxial flexure strength of a commercially available dental pulp capping or cavity liner material, mineral trioxide aggregate (MTA). MTA and a conventional pulp capping material, calcium hydroxide, were used in this study. Each material was prepared into a disk-shaped specimen. Those specimens were stored in 100% humidity atmosphere at 23 or 37°C for 3 or 24 h. Six specimens in each condition were used for the biaxial flexure test using a piston-on-three-ball according to ISO-6872. Surface pH values were determined. The biaxial flexure strengths of MTA after setting in 24h were larger than those of Dycal (p <0.01). pH value of MTA was higher than that of Dycal. These results indicated that MTA was clinically usage material.
Marcelo Prado and Cecília Zavaglia
H. Sato et al., "Effect of Storage Conditions on Biaxial Flexure Strengths of MTA", Key Engineering Materials, Vols. 396-398, pp. 429-432, 2009