Influence of the yttrium content on the fracture strength of monolithic zirconia crowns after artificial aging

Conclusions: Increasing the content of yttrium oxide in attempt to improve the optical properties can reduce the mechanical properties after aging of the ceramic as shown in this study. However, even the more translucent 5Y-TZP showed very high fracture resistance, which exceeded 3,000 N. Based on the results of this study, care should be taken when using zirconia with high content of yttrium oxide in areas or situations with high stresses.

Source: Quintessence International - April 6, 2019 Category: Dentistry Source Type: research