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Improving bioactivity of inert bioceramics by a novel Mg-incorporated solution treatment
Purdue University.
Purdue University.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.ORCID iD: 0000-0003-4860-8763
Purdue University.
2017 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 425, 564-575 p.Article in journal (Refereed) Published
Abstract [en]

Zirconia/alumina ceramics possess outstanding mechanical properties for dental and orthopedic applications, but due to their poor surface bioactivities they exhibit a weak bone-bonding ability. This work proposes an effective 30-min solution treatment which could successfully induce formation of bone-like apatite on the surface of 3Y-TZP and a ternary composite composed of yttria-stabilized zirconia, ceria-stabilized zirconia, and alumina (35 vol% 3Y-TZP + 35 vol% 12Ce-TZP + 30 vol% Al2O3) after 3 weeks immersion in simulated body fluid (SBF). XRD was used for phase identification in the ceramic materials. The influence of solution treatment on the surface chemistry and its role on apatite formation were investigated via SEM, EDS and XPS. In vitro apatite-forming ability for the solution-treated and untreated samples of the composite and individual substrates of 3Y-TZP, 12Ce-TZP, and Al2O3 was evaluated by immersion in SBF. Apatite crystals were formed only on 3Y-TZP and composite substrates, implying that it is mainly the 3Y-TZP constituent that contributes to the bioactivity of the composite. Further, it was found from the XPS analysis that the zirconia material with higher phase stability (12Ce-TZP) produced less Zr–OH functional groups on its surface after solution treatment which accounts for its weaker bioactivity compared to 3Y-TZP. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2017. Vol. 425, 564-575 p.
Keyword [en]
Alumina, Apatite, Bioactivity, Bioceramics, Bone, Ceramic materials, Chemical bonds, Hydroxyapatite, Phosphate minerals, Photodegradation, Surface chemistry, Temperature, X ray photoelectron spectroscopy, Zirconia, Composite substrate, Low temperature aging, Orthopedic applications, Phase identification, Simulated body fluids, Solution treatments, Stabilized zirconia, Surface bioactivity, Yttria stabilized zirconia
National Category
Medical Materials Ceramics
Identifiers
URN: urn:nbn:se:ri:diva-31238DOI: 10.1016/j.apsusc.2017.07.009Scopus ID: 2-s2.0-85027861365OAI: oai:DiVA.org:ri-31238DiVA: diva2:1141667
Available from: 2017-09-15 Created: 2017-09-15 Last updated: 2017-09-15Bibliographically approved

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