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Effects of Surface Treatments on Biaxial Flexural Strength of Mg-PSZ Zirconia.: A pilot study
Umeå University, Faculty of Medicine, Department of Odontology.
Umeå University, Faculty of Medicine, Department of Odontology.
2018 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

ABSTRACT

The purpose of the present study was to evaluate the impact of various surface treatments on the surface topography and on the biaxial flexural strength (BFS) of magnesia-stabilized zirconia (Mg-PSZ). Twenty discs of colored Mg-PSZ were randomized into 4 groups. Group 1 was tested as delivered from the manufacturer and served as control. Groups 2 and 3 were sandblasted with 110 µm , 0.6 MPa for 90 sec. In addition, after sandblasting, group 3 was heat-treated similar to veneering. Group 4 was covered with a thin layer of veneer ceramic and subsequently sandblasted in a way similar to the specimens in groups 2 and 3. The surface topography was determined in accordance to EN 623-4:2004 Σ and the BFS tests in accordance to ISO-standard EN 623-4:2004. The glazed and sandblasted discs exhibited significantly (p<0.001) inferior BFS compared with the sandblasted and heat-treated discs. No statistically significant (p>0.05) differences were seen between the other groups tested. There was no statistically significant correlation (p>0.05) between the surface topography of the specimens and BFS (Pearson’s correlation test). Glazing and sandblasting the specimens decreased (p<0.001) the strength compared to sandblasting and heat-treatment. Based on these findings glazing using similar technique as in the present study seems not to be usable to improve bonding of resin cements to Mg-PSZ oxide ceramic surfaces.  

Place, publisher, year, edition, pages
2018.
Keywords [en]
aging, glazing, magnesia-stabilized, surface topography.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:umu:diva-154173OAI: oai:DiVA.org:umu-154173DiVA, id: diva2:1270304
External cooperation
VLL
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Available from: 2018-12-18 Created: 2018-12-12 Last updated: 2018-12-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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