Evaluating dental zirconia

Yu Zhang, Brian R. Lawn

Research output: Contribution to journalArticle

Abstract

Objectives: To survey simple contact testing protocols for evaluating the mechanical integrity of zirconia dental ceramics. Specifically, to map vital material property variations and to quantify competing damage modes. Methods: Exploratory contact tests are conducted on layer structures representative of zirconia crowns on dentin. Results: Sharp-tip micro- and nano-indentations were used to investigate the roles of weak interfaces and residual stresses in veneered zirconia, and to map property variations in graded structures. Tests with blunt sphere indenters on flat specimens were used to identify and quantify various critical damage modes in simulated occlusal loading in veneered and monolithic zirconia. Significance: Contact testing is a powerful tool for elucidating the fracture and deformation modes that control the lifetimes of zirconia dental ceramics. The advocated tests are simple, and provide a sound physical basis for analyzing damage resistance of anatomically-correct crowns and other complex dental prostheses.

Original languageEnglish (US)
JournalDental Materials
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Zirconia
Tooth
Ceramics
Crowns
Dental Prosthesis
Dental prostheses
Testing
Dentin
Nanoindentation
Indentation
Residual stresses
Materials properties
zirconium oxide
Acoustic waves

Keywords

  • Dental prostheses
  • Fatigue
  • Fracture mode
  • Indentation
  • Translucency
  • Zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Evaluating dental zirconia. / Zhang, Yu; Lawn, Brian R.

In: Dental Materials, 01.01.2018.

Research output: Contribution to journalArticle

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