Work

Degradation of dental ZrO2-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses

Year: 2012

Type: article

Abstract: The aim was to investigate the effect of simulated low-temperature degradation (s-LTD) and hydrothermal fatigue on the degradation of three ZrO(2)-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 ZrO(2) 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.

Source: Dental Materials Journal

DOI: 10.4012/dmj.2011-216

Authors: Jorge PERDIGÃO, Ana M. PINTO, Regina C.C. MONTEIRO, Francisco M. BRAZ FERNANDES, Pedro LARANJEIRA, João P. VEIGA

Institutions: University of Minnesota, University of Lisbon, Centro de Investigação em Materiais, Universidade Nova de Lisboa

Language: English

Topic: Dental materials and restorations

Subfield: General Dentistry

Field: Dentistry

Domain: Health Sciences

Open Access status: bronze

Funder: University of Minnesota

OpenAlex ID: W2015147127

FWCI: 1.972

Cites: 39

Cited by: 27

Related to: 10