Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 36, Issue 1, Pages 121-134Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.09.021
Keywords
Zirconia; Hydrofluoric; Etching; Dental; Roughness
Categories
Funding
- European Commission under the 7th Framework Programme (Marie Curie Initial Training Networks) [289958]
- Ministry of Economy and Competitiveness (MINECO) of Spain [MAT2011-23913]
- Government of Catalonia [2014SGR0137]
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Rough surfaces have been shown to promote osseointegration, which is one of the keys for a successful dental implantation. Among the diverse treatments proposed to roughen zirconia, hydrofluoric acid (HF) etching appears to be a good candidate, however little is known about this process. In this work, the effect of HF concentration and etching time on the surface topography and chemistry of yttria-stabilized zirconia was assessed. Besides, to understand the etching mechanism, the reaction products present in solution and on the surface were characterized. The results indicate suitable parameters for a fast and uniform roughening of zirconia. The formation of adhered fluoride precipitates on the surface is reported for the first time and highlights the importance of cleaning after etching. Finally, it is shown that monitoring the time allows controlling the surface roughness, smooth rough transition and fractal dimension, which should make possible the fabrication of implants with an optimal topography. (C) 2015 Elsevier Ltd. All rights reserved.
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