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Evidence of yttrium silicate inclusions in YSZ-porcelain veneers.

Publication ,  Journal Article
Stoner, BR; Griggs, JA; Neidigh, J; Piascik, JR
Published in: Journal of biomedical materials research. Part B, Applied biomaterials
April 2014

This report introduces the discovery of crystalline defects that can form in the porcelain veneering layer when in contact with yttria-stabilized zirconia (YSZ). The focus was on dental prostheses and understanding the defects that form in the YSZ/porcelain system; however the data reported herein may have broader implications toward the use and stability of YSZ-based ceramics in general. Specimens were cut from fully sintered YSZ plates and veneering porcelain was applied (<1 mm thick) to one surface and fired under manufacturer's recommended protocol. Scanning electron microscopy (SEM) with integrated electron dispersive X-ray (EDAX) was used for microstructural and elemental analysis. EDAX, for chemical analysis and transmission electron diffraction (TED) for structural analysis were both performed in the transmission electron microscope (TEM). Additionally, in order to spatially resolve Y-rich precipitates, micro-CT scans were conducted at varying depths within the porcelain veneer. Local EDAX (SEM) was performed in the regions of visible inclusions and showed significant increases in yttrium concentration. TEM specimens also showed apparent inclusions in the porcelain and selected area electron diffraction was performed on these regions and found the inclusions to be crystalline and identified as either yttrium-silicate (Y2 SiO5 ) or yttrium-disilicate (Y2 Si2 O7 ). Micro-CT data showed that yttrium-silicate precipitates were distributed throughout the thickness of the porcelain veneer. Future studies are needed to determine whether many of the premature failures associated with this materials system may be the result of crystalline flaws that form as a result of high temperature yttrium diffusion near the surfaces of YSZ.

Duke Scholars

Published In

Journal of biomedical materials research. Part B, Applied biomaterials

DOI

EISSN

1552-4981

ISSN

1552-4973

Publication Date

April 2014

Volume

102

Issue

3

Start / End Page

441 / 446

Related Subject Headings

  • Zirconium
  • Yttrium
  • X-Ray Diffraction
  • Tomography, X-Ray Computed
  • Surface Properties
  • Silicates
  • Microscopy, Electron, Transmission
  • Microscopy, Electron, Scanning
  • Dental Veneers
  • Dental Stress Analysis
 

Citation

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MLA
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Stoner, B. R., Griggs, J. A., Neidigh, J., & Piascik, J. R. (2014). Evidence of yttrium silicate inclusions in YSZ-porcelain veneers. Journal of Biomedical Materials Research. Part B, Applied Biomaterials, 102(3), 441–446. https://doi.org/10.1002/jbm.b.33021
Stoner, Brian R., Jason A. Griggs, John Neidigh, and Jeffrey R. Piascik. “Evidence of yttrium silicate inclusions in YSZ-porcelain veneers.Journal of Biomedical Materials Research. Part B, Applied Biomaterials 102, no. 3 (April 2014): 441–46. https://doi.org/10.1002/jbm.b.33021.
Stoner BR, Griggs JA, Neidigh J, Piascik JR. Evidence of yttrium silicate inclusions in YSZ-porcelain veneers. Journal of biomedical materials research Part B, Applied biomaterials. 2014 Apr;102(3):441–6.
Stoner, Brian R., et al. “Evidence of yttrium silicate inclusions in YSZ-porcelain veneers.Journal of Biomedical Materials Research. Part B, Applied Biomaterials, vol. 102, no. 3, Apr. 2014, pp. 441–46. Epmc, doi:10.1002/jbm.b.33021.
Stoner BR, Griggs JA, Neidigh J, Piascik JR. Evidence of yttrium silicate inclusions in YSZ-porcelain veneers. Journal of biomedical materials research Part B, Applied biomaterials. 2014 Apr;102(3):441–446.
Journal cover image

Published In

Journal of biomedical materials research. Part B, Applied biomaterials

DOI

EISSN

1552-4981

ISSN

1552-4973

Publication Date

April 2014

Volume

102

Issue

3

Start / End Page

441 / 446

Related Subject Headings

  • Zirconium
  • Yttrium
  • X-Ray Diffraction
  • Tomography, X-Ray Computed
  • Surface Properties
  • Silicates
  • Microscopy, Electron, Transmission
  • Microscopy, Electron, Scanning
  • Dental Veneers
  • Dental Stress Analysis