期刊
DENTAL MATERIALS
卷 33, 期 11, 页码 1192-1204出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2017.09.006
关键词
Static fatigue; Dynamic; Cyclic loading; Slow crack growth; Ceramic fracture; Degradation; Lifetime; SPT diagram; S-N curve
资金
- Academy of Dental Materials
Background. Clinical failure of dental ceramics is usually reported as partial fracture of the restoration (chipping) or as catastrophic fracture of the whole structure. In contrast to metals, ceramics are linear-elastic, brittle materials exhibiting extremely low damage tolerance to failure. Well documented clinical and lab reports have shown this fracture event often occurs at loads far below their fracture strength due to intrinsic fatigue degradation via slow crack growth or cyclic fatigue mechanisms. The presence and development of surface flaw shave a dominant role in damage accumulation and lifetime reduction of ceramic structures. Aims. This ADM guidance document aims to summarize the aspects related to fatigue degradation of dental ceramics, reviewing the concepts of fatigue testing and furthermore aims to provide practical guidance to young scientists entering into fatigue related research. The description of fatigue strength is always accompanied by a clear understanding of the underlying fracture mechanisms. (C) 2017 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
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