Novel Zirconia Materials in Dentistry

Y. Zhang, B. R. Lawn

Research output: Contribution to journalArticlepeer-review

Abstract

Zirconias, the strongest of the dental ceramics, are increasingly being fabricated in monolithic form for a range of clinical applications. Y-TZP (yttria-stabilized tetragonal zirconia polycrystal) is the most widely used variant. However, current Y-TZP ceramics on the market lack the aesthetics of competitive glass-ceramics and are therefore somewhat restricted in the anterior region. This article reviews the progressive development of currently available and next-generation zirconias, representing a concerted drive toward greater translucency while preserving adequate strength and toughness. Limitations of efforts directed toward this end are examined, such as reducing the content of light-scattering alumina sintering aid or incorporating a component of optically isotropic cubic phase into the tetragonal structure. The latest fabrication routes based on refined starting powders and dopants, with innovative sintering protocols and associated surface treatments, are described. The need to understand the several, often complex, mechanisms of long-term failure in relation to routine laboratory test data is presented as a vital step in bridging the gaps among material scientist, dental manufacturer, and clinical provider.

Original languageEnglish (US)
Pages (from-to)140-147
Number of pages8
JournalJournal of dental research
Volume97
Issue number2
DOIs
StatePublished - Feb 1 2018

Keywords

  • ceramics
  • dental prostheses
  • durability
  • graded structure
  • nanostructure
  • translucency

ASJC Scopus subject areas

  • Dentistry(all)

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