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首页> 外文期刊>Acta Stomatologica Croatica >Numerical and Experimental Analysis of the Influence of Assembling Conditions and the Tolerance of Adapted Implantological Components on the Durability of the Prosthetic Construction
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Numerical and Experimental Analysis of the Influence of Assembling Conditions and the Tolerance of Adapted Implantological Components on the Durability of the Prosthetic Construction

机译：组装条件和适应性植入物组件的公差对假体结构耐久性影响的数值和实验分析

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摘要

Durable fastening of implant retained prosthetic restorations, consisting of a series of elements, is one of the main factors of successful prosthetic rehabilitation. Clinically observed mechanical problems concerning the above mentioned components are complications that occur most often in the loading phase. The aim of this research was evaluation of the suppleness of the implant- -anti-rotary abutment construction to loosening under the influence of labile mechanical stress. Numerical analysis of resistance based on the finite element analysis (FEA) was used in the initial phase of this research. The actual tests were done with the use of a dynamic mechanical analyser Netzsch DMA 242 and a polarisation microscope equipped with a CCD camera. A series of implants connected with abutments composed of two parts were analysed. The results of initial studies utilizing the finite element analysis (FEA) allowed definition of the spheres of stress concentration. On the basis of in vitro experiments, the investigators evaluated the influence of tolerance of adapted implant-abutment interface fit, as well as the torque used in the assembly of the abutment, on the occurrence of micromovements and loosening of components. The results strongly indicate correlation between the chosen variables and the risk of occurrence of mechanical complications.
机译：由一系列要素组成的植入物固定修复体的持久紧固是成功修复修复的主要因素之一。临床上观察到的有关上述组件的机械问题是在装载阶段最常发生的并发症。这项研究的目的是评估在不稳定的机械应力的作用下，植入物-抗旋转基台结构是否松动。在本研究的初始阶段，使用了基于有限元分析（FEA）的电阻数值分析。实际测试是使用动态机械分析仪Netzsch DMA 242和配备CCD相机的偏振显微镜完成的。分析了由两部分组成的一系列与基台连接的植入物。利用有限元分析（FEA）进行的初步研究结果允许定义应力集中范围。在体外实验的基础上，研究人员评估了合适的种植体-基台界面配合公差以及基台组装中使用的扭矩对微动和零件松动的影响。结果强烈表明所选变量与发生机械并发症的风险之间的相关性。

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