Materials | |
Long Term Fatigue Behavior of Zirconia Based Dental Ceramics | |
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.
【 预 览 】
Files | Size | Format | View |
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RO202003190053813ZK.pdf | 272KB | download |