Transformation-toughened zirconia: An overview

Authors

  • B Pathak Department of Prosthodontics, Nepal Medical College, Kathmandu, Nepal
  • B Maskey Department of Prosthodontics and Maxillofacial Prosthetics, People’s Dental College and Hospital, Kathmandu, Nepal
  • A Bhochhibhoya Department of Prosthodontics, T.U Teaching Hospital, Maharajgunj Medical Campus, Institute of Medicine, Maharajgunj, Kathmandu, Nepal
  • D Devkota Department of Prosthodontics, Nepal Medical College, Kathmandu, Nepal

DOI:

https://doi.org/10.3126/jnprossoc.v5i1.53394

Keywords:

Degradation, Phase Transformation, Toughened Ceramics, Zirconia

Abstract

Zirconia is a “metastable” ceramic, consisting of monoclinic, tetragonal, and cubic phases. Partially stabilized zirconia is preferred choice for dental use since they offer the opportunity to fabricate prosthesis which is not available with other ceramic materials. Phase transformation in zirconia ceramics represents one of the most remarkable innovations in the ceramic field. This phase transformation can have desirable consequences, increase in crack growth resistance which is referred to as “phase transformation toughening”. However, the phase-induced volumetric transformation can also have disastrous consequences, if not properly controlled. This article provides information on crystallography of zirconia and the main characteristics of the tetragonal to monoclinic transformation
and also discusses the positive (transformation toughening) and negative aspects (ageing/LTD) of the tetragonal to monoclinic transformation.

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Author Biography

B Maskey, Department of Prosthodontics and Maxillofacial Prosthetics, People’s Dental College and Hospital, Kathmandu, Nepal

Associate Professor

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Published

2022-12-31

How to Cite

Pathak, B., Maskey, B., Bhochhibhoya, A., & Devkota, D. (2022). Transformation-toughened zirconia: An overview. Journal of Nepalese Prosthodontic Society, 5(1), 19–24. https://doi.org/10.3126/jnprossoc.v5i1.53394

Issue

Vol. 5 No. 1 (2022)

Section

Review Articles

License

Copyright (c) 2022 B Pathak, B Maskey, A Bhochhibhoya, D Devkota

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. © The authors