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.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Perdigão J,Pinto AM,Monteiro RC,Braz Fernandes FM,Laranjeira P,Veiga JPdoi
10.4012/dmj.2011-216subject
Has Abstractpub_date
2012-01-01 00:00:00pages
256-65issue
2eissn
0287-4547issn
1881-1361pii
JST.JSTAGE/dmj/2011-216journal_volume
31pub_type
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