Effects of surface treatments on the susceptibilities of low temperature degradation by autoclaving in zirconia

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Tae-Hoon LeeBum-Soon Lim

Abstract

The aim of this study was to investigate the effect of surface treatments on the aging susceptibilities by autoclaving in zirconia ceramics. Four commercially available tetragonal zirconia polycrystals and one zirconia-alumina composite were tested. Disk-shaped specimens were prepared and the grain sizes were analyzed using a scanning electron microscope and image analyzer. The specimens were divided into three groups based on surface treatments including heat treatment subsequent to mirror polishing, grinding, and sandblasting. Specimens in each group were autoclaved at 134°C for 1, 3, 5, 10, and 15 h. The phases of the specimens were analyzed using an X-ray diffractometer, and the relative amount of the monoclinic phase was calculated and analyzed using Student's t-test and Newman-Keuls multiple comparisons test. Single routine autoclave treatment for sterilization did not promote the phase transformation in zirconia. The phase transformations of all specimens by autoclaving were correlated with grain size, except for the zirconia-alumina composite. Grinding or sandblasting treatments gave rise to increased formation of the monoclinic phase, especially for the zirconia-alumina composite, which showed the highest fraction for ...Continue Reading

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Citations

Jun 3, 2014·Journal of the Mechanical Behavior of Biomedical Materials·Ferhan EgilmezLippo V J Lassila
Oct 4, 2014·The Journal of Prosthetic Dentistry·Brian D FlinnLloyd A Mancl
Nov 23, 2015·Journal of the Mechanical Behavior of Biomedical Materials·G K R PereiraL F Valandro
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Jun 22, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Anna VataliPetros Koidis
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Mar 7, 2020·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Srigurunathan Kalaivani, Sanjeevi Kannan

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