Interfacial modulus mapping of layered dental ceramics using nanoindentation

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dc.contributor.author Theocharopoulos, Antonios L.
dc.contributor.author Bushby, Andrew J.
dc.contributor.author P'ng, Ken M. Y.
dc.contributor.author Wilson, Rory M.
dc.contributor.author Tanner, K. Elizabeth
dc.contributor.author Cattell, Michael J.
dc.date.accessioned 2017-01-20T15:21:54Z
dc.date.available 2017-01-20T15:21:54Z
dc.date.issued 2016-12-15
dc.identifier.citation Theocharopoulos, A. L., Bushby, A. J., P'ng, K. M. Y., Wilson, R. M., Tanner, K. E. and Cattell, M. J. (2016) 'Interfacial modulus mapping of layered dental ceramics using nanoindentation', J Adv Prosthodont, 8(6), pp. 479-488. doi:10.4047/jap.2016.8.6.479 en
dc.identifier.volume 8 en
dc.identifier.issued 6 en
dc.identifier.startpage 479 en
dc.identifier.endpage 488 en
dc.identifier.issn 2005-7806
dc.identifier.uri http://hdl.handle.net/10468/3491
dc.identifier.doi 10.4047/jap.2016.8.6.479
dc.description.abstract PURPOSE: The aim of this study was to test the modulus of elasticity (E) across the interfaces of yttria stabilized zirconia (YTZP) / veneer multilayers using nanoindentation. MATERIALS AND METHODS: YTZP core material (KaVo-Everest, Germany) specimens were either coated with a liner (IPS e.max ZirLiner, Ivoclar-Vivadent) (Type-1) or left as-sintered (Type-2) and subsequently veneered with a pressable glass-ceramic (IPS e.max ZirPress, Ivoclar-Vivadent). A 5 µm (nominal tip diameter) spherical indenter was used with a UMIS CSIRO 2000 (ASI, Canberra, Australia) nanoindenter system to test E across the exposed and polished interfaces of both specimen types. The multiple point load – partial unload method was used for E determination. All materials used were characterized using Scanning Electron Microscopy (SEM) and X – ray powder diffraction (XRD). E mappings of the areas tested were produced from the nanoindentation data. RESULTS: A significantly (P<.05) lower E value between Type-1 and Type-2 specimens at a distance of 40 µm in the veneer material was associated with the liner. XRD and SEM characterization of the zirconia sample showed a fine grained bulk tetragonal phase. IPS e-max ZirPress and IPS e-max ZirLiner materials were characterized as amorphous. CONCLUSION: The liner between the YTZP core and the heat pressed veneer may act as a weak link in this dental multilayer due to its significantly (P<.05) lower E. The present study has shown nanoindentation using spherical indentation and the multiple point load - partial unload method to be reliable predictors of E and useful evaluation tools for layered dental ceramic interfaces. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Korean Academy of Prosthodontics en
dc.rights © 2016 The Korean Academy of Prosthodontics. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. en
dc.rights.uri https://creativecommons.org/licenses/by-nc/3.0/ en
dc.subject Elastic modulus en
dc.subject Fluorapatite en
dc.subject Zirconia en
dc.title Interfacial modulus mapping of layered dental ceramics using nanoindentation en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Antonios Theocharopoulos, Restorative Dentistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: a.theocharopoulos@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2017-01-20T15:14:12Z
dc.description.version Published Version en
dc.internal.rssid 380364523
dc.contributor.funder State Scholarships Foundation en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal Of Advanced Prosthodontics en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress a.theocharopoulos@ucc.ie en


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© 2016 The Korean Academy of Prosthodontics. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Except where otherwise noted, this item's license is described as © 2016 The Korean Academy of Prosthodontics. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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