Investigating the Effect of Different Surface Treatments on Vickers Hardness and Flexural Strength of Zirconium and Lithium Disilicate Ceramics

J Prosthodont. 2020 Feb;29(2):129-135. doi: 10.1111/jopr.12939. Epub 2018 Jul 1.

Abstract

Purpose: To investigate the effect of different surface treatments on Vickers hardness and flexural strength of zirconia and lithium disilicate ceramics.

Materials and methods: 50 zirconia and 50 lithium disilicate ceramic specimens were used. After identifying one group as the control, grinding, sandblasting, CoJet, and Er:YAG laser were applied on the surface of specimens (n = 10). After applying Vickers hardness test to specimens, flexural strength test was performed. The data were analyzed with two-way ANOVA and Duncan's multiple comparisons tests.

Results: There were statistically significant differences found between surface treatment groups in terms of Vickers hardness of zirconia and lithium disilicate ceramics (p < 0.001), but there were no statistically significant differences found between surface treatment groups in terms of flexural strength (p > 0.05).

Conclusions: Surface treatments could affect the hardness of ceramics. Therefore, was zirconia found to be harder and more durable than lithium disilicate ceramics.

Keywords: Flexural strength; hardness; lithium disilicate; zirconia.

MeSH terms

  • Ceramics
  • Dental Porcelain
  • Flexural Strength*
  • Hardness
  • Materials Testing
  • Surface Properties
  • Zirconium*

Substances

  • lithia disilicate
  • Dental Porcelain
  • Zirconium