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Evaluating mechanical properties and degradation of YTZP dental implants

机译：评估YTZP牙科植入物的机械性能和降解

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摘要

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.
机译：最近，新的生物医学级氧化钇稳定氧化锆（YTZP）牙科植入物已经出现在植入物市场中。这种材料比用于植入物的常规钛具有更好的美学特性，但这些新型植入物的长期性能尚不为人所知。本文的目的是量化先前在不同时间条件下降解的YTZP牙科植入物的机械响应，并比较钛植入物的韧性和疲劳强度。通过遵循ISO 14801牙科植入物标准的机械测试和有限元分析，研究了机械响应。水蒸气加速了水热降解，并通过X射线衍射和纳米压痕测试进行了研究。结果表明，YTZP牙科植入物遭受的降解不会对机械性能产生重大影响。否则，在某些植入条件下，YTZP陶瓷的断裂韧性仍然不足。

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  • 来源
    《Materials science & engineering》 |2010年第1期|14-19|共6页
  • 作者

    Pablo Sevilla; Clara Sandino; Milena Arciniegas; Jordi Martinez-Gomis; Maria Peraire; Francisco Javier Gil;

  • 作者单位

    Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia, Spain;

    Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia, Spain;

    Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia, Spain;

    Department of Prosthodontics, Faculty of Odontology, University of Barcelona, Spain;

    Department of Prosthodontics, Faculty of Odontology, University of Barcelona, Spain;

    Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia, Spain;

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  • 正文语种 eng
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  • 关键词

    Y-TZP; dental implants; fatigue and fracture; degradation; nanoindentation;

    机译：Y-TZP;牙植入物;疲劳和断裂;降解;纳米压痕;

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