ADM guidance-ceramics: fatigue principles and testing

J. R. Kelly, P. F. Cesar, S. S. Scherrer, A. Della Bona, R. van Noort, M. Tholey, A. Vichi, U. Lohbauer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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 flaws have 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.

Original languageEnglish
Pages (from-to)1192-1204
Number of pages13
JournalDental Materials
Issue number11
Early online date7 Oct 2017
Publication statusPublished - 1 Nov 2017


  • Ceramic fracture
  • Cyclic loading
  • Degradation
  • Dynamic
  • Lifetime
  • Slow crack growth
  • SPT diagram
  • Static fatigue
  • S–N curve


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