Degradation of dental ZrO2-based materials after hydrothermal fatigue. part I

XRD, XRF, and FESEM analyses

Jorge Perdigao, Ana M. Pinto, Regina C.C. Monteiro, Francisco M. Braz Fernandes, Pedro Laranjeira, João P. Veiga

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The aim was to investigate the effect of simulated low-temperature degradation (s-LTD) and hydrothermal fatigue on the degradation of three ZrO2-based dental materials. Lava, IPS, and NanoZr discs were randomly assigned to (1) Control-Storage in distilled water at 37°C; (2) Aging at 134°C for 5 h (s-LTD); (3) Thermocycling in saliva for 30,000 cycles (TF). XRD revealed that ZrO2 m phase was identified in all groups but TF increased the m phase only for Lava. Under the FESEM, Lava showed no alterations under s-LTD, but displayed corrosion areas up to 60 μm wide after TF. We conclude that TF accelerated the degradation of Lava through an increase in the m phase and grain pull-out from the material surface.

Original languageEnglish (US)
Pages (from-to)256-265
Number of pages10
JournalDental Materials Journal
Volume31
Issue number2
DOIs
StatePublished - Jan 1 2012

Fingerprint

Fatigue
Tooth
Fatigue of materials
Degradation
Temperature
Dental Materials
Corrosion
Saliva
Dental materials
Thermal cycling
Water
Aging of materials

Keywords

  • Electron microscopy
  • Low-temperature degradation (LTD)
  • Thermal fatigue
  • Zirconia

Cite this

Degradation of dental ZrO2-based materials after hydrothermal fatigue. part I : XRD, XRF, and FESEM analyses. / Perdigao, Jorge; Pinto, Ana M.; Monteiro, Regina C.C.; Braz Fernandes, Francisco M.; Laranjeira, Pedro; Veiga, João P.

In: Dental Materials Journal, Vol. 31, No. 2, 01.01.2012, p. 256-265.

Research output: Contribution to journalArticle

Perdigao, Jorge ; Pinto, Ana M. ; Monteiro, Regina C.C. ; Braz Fernandes, Francisco M. ; Laranjeira, Pedro ; Veiga, João P. / Degradation of dental ZrO2-based materials after hydrothermal fatigue. part I : XRD, XRF, and FESEM analyses. In: Dental Materials Journal. 2012 ; Vol. 31, No. 2. pp. 256-265.
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