Hydrofluoric acid etching of dental zirconia. Part 2: effect on flexural strength and ageing behavior
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Among the diverse treatments proposed to promote the osseointegration of zirconia dental implants, hydrofluoric acid (HF) etching appears to be a good candidate. However little is known on the effect of this process on the mechanical properties and long-term reliability. In this work, the surface integrity, the flexural strength and the ageing sensitivity of yttria-stabilized zirconia were assessed after etching in HF 40%. Results show that etching induces an increase of monoclinic phase content and a decrease in flexural strength. The strength decrease is limited to 15% for etching times below 60 min, whereas it reaches 29% after 120 min because of the formation of large etching pits. No substantial change in the ageing sensitivity was evidenced. Within the limits of this study, HF 40% etched zirconia appears to be reliable for long-term implantation provided that the etching duration does not exceed 60 mm. (C) 2015 Elsevier Ltd. All rights reserved.
CitacióFlamant, Q., Anglada, M. Hydrofluoric acid etching of dental zirconia. Part 2: effect on flexural strength and ageing behavior. "Journal of the european ceramic society", 01 Gener 2016, vol. 36, núm. 1, p. 135-145.
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S0955221915301412