The effects of mechanical and hydrothermal aging on microstructure and biaxial flexural strength of an anterior and a posterior monolithic zirconia

Conclusions AMZ showed the largest mean grain size, had the lowest BFS values, and was affected when mechanical cycling was involved. Monoclinic transformation was not found in any treatment for AMZ, but was found in IZr and PMZ when hydrothermal aging was used alone or when combined with mechanical cycling. PMZ showed similar behavior to the IZr. H induced to higher fracture probability. Keywords mechanical cycling; hydrothermal aging; anterior monolithic zirconia; posterior monolithic zirconia; biaxial flexure strength; crystalline phase. Clinical significance Translucent monolithic dental zirconia available on the market may behave differently under simulated oral aging. The relationship between composition and microstructure determines their properties and, presumably, clinical performance.

Source: Journal of Dentistry - June 5, 2017 Category: Dentistry Source Type: research