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The role of prosthetic abutment material on the stress distribution in a maxillary single implant-supported fixed prosthesis

机译：假体基台材料对上颌单个种植体支撑的固定假体中应力分布的作用

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摘要

Purpose: Evaluate the influence of abutment's material and geometry on stress distribution in a single implant-supported prosthesis. Materials and Methods: Three-dimensional models were made based on tomographic slices of the upper middle incisor area, in which a morse taper implant was positioned and a titanium (Ti) or zirconia (ZrN) universal abutments was installed. The commercially available geometry of titanium (T) and zirconia (Z) abutments were used to draw two models, TM1 and ZM1 respectively, which served as control groups. These models were compared with 2 experimental groups were the mechanical properties of Z were applied to the titanium abutment (TM2) and vice versa for the zirconia abutment (ZM2). Subsequently, loading was simulated in two steps, starting with a preload phase, calculated with the respective friction coefficients of each materials, followed by a combined preload and chewing force. The maximum von Mises stress was described. Data were analyzed by two-way ANOVA that considered material composition, geometry and loading (p ＜ 0.05). Results: Titanium and zirconia abutments showed similar von Mises stresses in the mechanical part of the four models. The area with the highest concentration of stress was the screw thread, following by the screw body. The highest stress levels occurred in screw thread was observed during the preloading phase in the ZM1 model (931 MPa); and during the combined loading in the TM1 model (965 MPa). Statistically significant differences were observed for loading, the material x loading interaction, and the loading x geometry interaction (p ＜ 0.05). Preloading contributed for 77.89% of the stress (p ＜ 0.05). There were no statistically significant differences to the other factors (p ＞ 0.05). Conclusion: The screw was the piece most intensely affected, mainly through the preload force, independent of the abutment's material.
机译：目的：评估基台的材料和几何形状对单个植入物支撑的假体中应力分布的影响。材料和方法：基于上中切牙区域的断层切片制作三维模型，在该切片中放置莫氏锥度植入物，并安装钛（Ti）或氧化锆（ZrN）通用基台。钛（T）和氧化锆（Z）基台的市售几何形状分别用于绘制两个模型TM1和ZM1，作为对照组。将这些模型与2个实验组进行了比较，分别将Z的机械性能应用于钛基台（TM2），反之亦然，将其应用于氧化锆基台（ZM2）。随后，分两步模拟加载，从预加载阶段开始，先用每种材料的各自摩擦系数计算，然后再组合预加载和咀嚼力。描述了最大冯·米塞斯应力。通过双向方差分析分析数据，其中考虑了材料成分，几何形状和载荷（p ＜0.05）。结果：钛和氧化锆基台在四个模型的机械部分显示了相似的冯·米塞斯应力。应力集中最大的区域是螺纹，其次是螺纹体。在ZM1模型的预压阶段观察到螺纹中最高的应力水平（931 MPa）；在TM1模型中的组合载荷下（965 MPa）。载荷，材料x载荷相互作用和载荷x几何相互作用之间存在统计学差异（p ＜0.05）。预压占应力的77.89％（p ＜0.05）。与其他因素无统计学差异（p＞ 0.05）。结论：螺钉受力最大，主要受到预紧力的影响，而与基台的材料无关。

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  • 来源
    《Materials science & engineering》 |2016年第8期|90-96|共7页
  • 作者

    Hugo Eduardo Peixoto; Dimorvan Bordin; Altair A. Del Bel Cury; Wander Jose da Silva; Fernanda Faot;

  • 作者单位

    Implantology Team, Latin American Institute of Research and Education in Dentistry, Curitiba, Parana, Brazil;

    Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Limeira avenue, 901 -Vila Rezende, Piracicaba, SP 13414-903, Brazil;

    Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Limeira avenue, 901 -Vila Rezende, Piracicaba, SP 13414-903, Brazil;

    Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Limeira avenue, 901 -Vila Rezende, Piracicaba, SP 13414-903, Brazil;

    Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Goncalves Chaves, 457, 2nd floor, Pelotas, Rio Grande do Sul 96015-560, Brazil;

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  • 正文语种 eng
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  • 关键词

    Dental implants; Dental implant-abutment design; Finite element analysis; Titanium; Zirconia;

    机译：牙种植体;牙种植体-基台设计;有限元分析;钛;氧化锆;

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