| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eliades, G.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2017Comparative analysis of the mechanical properties of fiber and stainless steel multistranded wires used for lingual fixed retentioncitations
- 2016Viscoelastic properties of orthodontic adhesives used for lingual fixed retainer bondingcitations
- 2013Interactions of dentine desensitisers with human dentine: morphology and composition.citations
- 2010Surface characterization of zirconia dental implantscitations
- 2010A metallurgical characterization of ten endodontic Ni-Ti instruments: Assessing the clinical relevance of shape memory and superelastic properties of Ni-Ti endodontic instruments
- 2009Surface characterization and force relaxation of retrieved silk suturescitations
- 2007Surface characterization of precious alloys treated with thione metal primerscitations
- 2003Multi-technique characterization of retrieved bone cement from revised total hip arthroplastiescitations
- 2000Light intensity effects on resin-composite degree of conversion and shrinkage strain
- 2000Degree of cure of orthodontic adhesives with various polymerization initiation modes
Places of action
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article
Surface characterization of zirconia dental implants
Abstract
Objectives: The aim of the study was to characterize the chemical composition, microstructure and roughness of two commercially available zirconia dental implants (WhiteSky and Zit-Z). Methods: The chemical composition of the cervical collar and threaded root parts of the implants (n = 2) were studied by XPS and HV-EDX. LV-SEM was used for morphological assessment, Raman microanalysis for microstructural characterization and optical profilometry for surface roughness measurements. XRD, HV-EDX and Raman microanalysis of bulk regions (longitudinal sections) were used as reference. Results: XPS showed the presence of C, O, Zr and Y (collar) plus Al (root) at implant surfaces. More C (10-26 at%) and a lower Al/Zr ratio were found in WhiteSky (1.05 vs 1.26 in Zit-Z). Zr, Y and Al were detected in single, fully oxidized states. The same elements, plus Hf, were identified by HV-EDX at bulk and surface regions, with a Al/Zr ratio higher in WhiteSky (0.17 vs 0.09 in Zit-Z). Na, K and Cl contaminants were traced at implant root parts by both methods. XRD analysis of cross-sectioned specimens revealed the presence of monoclinic and tetragonal zirconia along with cubic yttria phases. Raman microanalysis showed that the monoclinic zirconia volume fraction was higher at root surfaces than the collar. No monoclinic phase was found at bulk regions. Significantly higher Sa and Sq values were recorded in WhiteSky than Zit-Z, whereas Zit-Z showed higher Rt value. Significance: The differences found between the implants in the extent of carbon contamination, residual alumina content, tetragonal to monoclinic ZrO2 phase transformation and 3D-roughness parameters may contribute to a substantial differentiation in the cellular and tissue response. © 2009 Academy of Dental Materials.