Evaluating mechanical properties and degradation of YTZP dental implants |
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Authors: | Pablo Sevilla Clara Sandino Milena Arciniegas Jordi Martínez-Gomis Maria Peraire Francisco Javier Gil |
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Affiliation: | 1. Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia, Spain;2. Department of Prosthodontics, Faculty of Odontology, University of Barcelona, Spain |
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Abstract: | Lately new biomedical grade yttria stabilized zirconia (YTZP) dental implants have appeared in the implantology market. This material has better aesthetical properties than conventional titanium used for implants but long term behaviour of these new implants is not yet well known. The aim of this paper is to quantify the mechanical response of YTZP dental implants previously degraded under different time conditions and compare the toughness and fatigue strength with titanium implants. Mechanical response has been studied by means of mechanical testing following the ISO 14801 for Standards for dental implants and by finite element analysis. Accelerated hydrothermal degradation has been achieved by means of water vapour and studied by X-ray diffraction and nanoindentation tests. The results show that the degradation suffered by YTZP dental implants will not have a significant effect on the mechanical behaviour. Otherwise the fracture toughness of YTZP ceramics is still insufficient in certain implantation conditions. |
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