ADM guidance-ceramics: Fatigue principles and testing

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.

Source: Dental Materials - October 7, 2017 Category: Materials Science Authors: J.R. Kelly, P.F. Cesar, S.S. Scherrer, A. Della Bona, R. van Noort, M. Tholey, A. Vichi, U. Lohbauer Tags: Review Source Type: research