Long Term Fatigue Behavior of Zirconia Based Dental Ceramics

Materials

关键词: surface damage;    surface roughness;    fatigue;    flexure strength;   

DOI  :  10.3390/ma3052975

来源: mdpi

【 摘 要 】

This study evaluated the influence of cyclic loading on zirconia bar-shaped specimens after being subjected to three different surface treatments: particle abrasion with either 50 μm or 110 μm alumina and grinding with diamond points, while polished specimens served as a control. Statistical analysis revealed significant reduction (38-67%) in flexure strength (P < 0.001) after three million cycles of dynamic loading for all surface treatments. Scanning electron imaging revealed grain boundary thickening, grain pull-out, and micro-cracking as the main structural defects. The results suggest that various surface treatments of zirconia based dental ceramics may significantly influence their long term fatigue resistance in the oral environment.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.