Fatigue of dental ceramics

Yu Zhang, Irena Sailer, Brian R. Lawn

Research output: Contribution to journalArticle

Abstract

Objectives Clinical data on survival rates reveal that all-ceramic dental prostheses are susceptible to fracture from repetitive occlusal loading. The objective of this review is to examine the underlying mechanisms of fatigue in current and future dental ceramics. Data/sources The nature of various fatigue modes is elucidated using fracture test data on ceramic layer specimens from the dental and biomechanics literature. Conclusions Failure modes can change over a lifetime, depending on restoration geometry, loading conditions and material properties. Modes that operate in single-cycle loading may be dominated by alternative modes in multi-cycle loading. While post-mortem examination of failed prostheses can determine the sources of certain fractures, the evolution of these fractures en route to failure remains poorly understood. Whereas it is commonly held that loss of load-bearing capacity of dental ceramics in repetitive loading is attributable to chemically assisted 'slow crack growth' in the presence of water, we demonstrate the existence of more deleterious fatigue mechanisms, mechanical rather than chemical in nature. Neglecting to account for mechanical fatigue can lead to gross overestimates in predicted survival rates. Clinical significance Strategies for prolonging the clinical lifetimes of ceramic restorations are proposed based on a crack-containment philosophy.

Original languageEnglish (US)
Pages (from-to)1135-1147
Number of pages13
JournalJournal of Dentistry
Volume41
Issue number12
DOIs
StatePublished - Dec 2013

Fingerprint

Ceramics
Fatigue
Tooth
Survival Rate
Dental Prosthesis
Information Storage and Retrieval
Weight-Bearing
Biomechanical Phenomena
Prostheses and Implants
Autopsy
Water
Growth

Keywords

  • Crowns
  • Dental ceramics
  • Fatigue
  • Fixed-partial dentures
  • Fracture modes
  • Lifetime

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Fatigue of dental ceramics. / Zhang, Yu; Sailer, Irena; Lawn, Brian R.

In: Journal of Dentistry, Vol. 41, No. 12, 12.2013, p. 1135-1147.

Research output: Contribution to journalArticle

Zhang, Y, Sailer, I & Lawn, BR 2013, 'Fatigue of dental ceramics', Journal of Dentistry, vol. 41, no. 12, pp. 1135-1147. https://doi.org/10.1016/j.jdent.2013.10.007
Zhang, Yu ; Sailer, Irena ; Lawn, Brian R. / Fatigue of dental ceramics. In: Journal of Dentistry. 2013 ; Vol. 41, No. 12. pp. 1135-1147.
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