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

    Abstract

    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
    Volume33
    Issue number11
    Early online date7 Oct 2017
    DOIs
    Publication statusPublished - 1 Nov 2017

    Keywords

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

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