Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures

Carina B. Tanaka, Hossam Harisha, Marta Baldassarri, Mark Wolff, Hui Tong, Josete B C Meira, Yu Zhang

Research output: Contribution to journalArticle

Abstract

The main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different shapes (bars, semi-cylindrical shells, and arch-cubic structures) with 1.5. mm and 0.7. mm thickness of dentin porcelain and zirconia framework, respectively, were subjected to two cooling protocols: slow cooling (SC) at 32. °C/min and extremely-slow cooling (XSC) at 2. °C/min. The residual thermal stresses were determined using the Vickers indentation method and validated by finite element analysis. The residual stress profiles were similar among geometries in the same cooling protocol. XSC groups presented significantly higher tensile stresses (p=0.000), especially for curved interfaces. XSC is a time-consuming process that showed no beneficial effect regarding residual stresses compared to the manufacturer recommended slow cooling rate.

Original languageEnglish (US)
JournalCeramics International
DOIs
StateAccepted/In press - Jan 19 2016

Fingerprint

Thermal stress
Residual stresses
Dental Porcelain
Porcelain
Cooling
Zirconia
Geometry
Arches
Indentation
Delamination
Tensile stress
Finite element method
zirconium oxide

Keywords

  • Cooling rates
  • Finite element analysis
  • Porcelain-veneered zirconia
  • Residual thermal stresses
  • Specimen geometries
  • Vickers indentation method

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures. / Tanaka, Carina B.; Harisha, Hossam; Baldassarri, Marta; Wolff, Mark; Tong, Hui; Meira, Josete B C; Zhang, Yu.

In: Ceramics International, 19.01.2016.

Research output: Contribution to journalArticle

Tanaka, Carina B. ; Harisha, Hossam ; Baldassarri, Marta ; Wolff, Mark ; Tong, Hui ; Meira, Josete B C ; Zhang, Yu. / Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures. In: Ceramics International. 2016.
@article{7411eea8bccf4537b70be281f934d14c,
title = "Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures",
abstract = "The main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different shapes (bars, semi-cylindrical shells, and arch-cubic structures) with 1.5. mm and 0.7. mm thickness of dentin porcelain and zirconia framework, respectively, were subjected to two cooling protocols: slow cooling (SC) at 32. °C/min and extremely-slow cooling (XSC) at 2. °C/min. The residual thermal stresses were determined using the Vickers indentation method and validated by finite element analysis. The residual stress profiles were similar among geometries in the same cooling protocol. XSC groups presented significantly higher tensile stresses (p=0.000), especially for curved interfaces. XSC is a time-consuming process that showed no beneficial effect regarding residual stresses compared to the manufacturer recommended slow cooling rate.",
keywords = "Cooling rates, Finite element analysis, Porcelain-veneered zirconia, Residual thermal stresses, Specimen geometries, Vickers indentation method",
author = "Tanaka, {Carina B.} and Hossam Harisha and Marta Baldassarri and Mark Wolff and Hui Tong and Meira, {Josete B C} and Yu Zhang",
year = "2016",
month = "1",
day = "19",
doi = "10.1016/j.ceramint.2016.03.018",
language = "English (US)",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures

AU - Tanaka, Carina B.

AU - Harisha, Hossam

AU - Baldassarri, Marta

AU - Wolff, Mark

AU - Tong, Hui

AU - Meira, Josete B C

AU - Zhang, Yu

PY - 2016/1/19

Y1 - 2016/1/19

N2 - The main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different shapes (bars, semi-cylindrical shells, and arch-cubic structures) with 1.5. mm and 0.7. mm thickness of dentin porcelain and zirconia framework, respectively, were subjected to two cooling protocols: slow cooling (SC) at 32. °C/min and extremely-slow cooling (XSC) at 2. °C/min. The residual thermal stresses were determined using the Vickers indentation method and validated by finite element analysis. The residual stress profiles were similar among geometries in the same cooling protocol. XSC groups presented significantly higher tensile stresses (p=0.000), especially for curved interfaces. XSC is a time-consuming process that showed no beneficial effect regarding residual stresses compared to the manufacturer recommended slow cooling rate.

AB - The main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different shapes (bars, semi-cylindrical shells, and arch-cubic structures) with 1.5. mm and 0.7. mm thickness of dentin porcelain and zirconia framework, respectively, were subjected to two cooling protocols: slow cooling (SC) at 32. °C/min and extremely-slow cooling (XSC) at 2. °C/min. The residual thermal stresses were determined using the Vickers indentation method and validated by finite element analysis. The residual stress profiles were similar among geometries in the same cooling protocol. XSC groups presented significantly higher tensile stresses (p=0.000), especially for curved interfaces. XSC is a time-consuming process that showed no beneficial effect regarding residual stresses compared to the manufacturer recommended slow cooling rate.

KW - Cooling rates

KW - Finite element analysis

KW - Porcelain-veneered zirconia

KW - Residual thermal stresses

KW - Specimen geometries

KW - Vickers indentation method

UR - http://www.scopus.com/inward/record.url?scp=84977904333&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84977904333&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2016.03.018

DO - 10.1016/j.ceramint.2016.03.018

M3 - Article

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

ER -