Subcritical crack growth behavior and life data analysis of two types of dental Y-TZP ceramics.

Objectives: The aim of this study was to evaluate the mechanical properties and the subcritical crack growth behavior of a presintered dental Y-TZP (Kavo Everest ZS) and a hot isostatic pressed Y-TZP (Kavo Everest ZH) and to perform life data analysis.

Methods: For each material 150 bending bars were produced. The initial fracture strength was determined in a four-point bending test.