Evaluation of acetabular cup initial fixation by using resonance frequency principle
Evaluation of acetabular cup initial fixation by using resonance frequency principle
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DOI：
10.1177/0954411914561485
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发表时间：
2015-01-01
期刊：
影响因子：
1.8
通讯作者：
Prochazka, Egon
中科院分区：
文献类型：
--
作者：
Henys, Petr;Capek, Lukas;Prochazka, Egon
临床实践表明，髋臼杯松动比股骨柄松动更常见。对于标准髋臼杯，关节置换术后第一年脱位失败的发生率最高。本研究的目的是通过使用基于共振频率分析的装置定量评价非骨水泥型髋臼杯假体的植入物-骨稳定性。通过有限元分析和体外实验对该器械进行了评价。结果表明，并不是所有的共振频率可以测量我们的设备。谐振频率在500- 3000 Hz的范围内变化。所提出的功率谱测量给出了关于压配式植入物的绝对刚度的信息。
The clinical practice shows that the loosening of acetabular cups is more frequent than stem loosening. With standard cups, the incidence of dislocation failure is highest in the first year after arthroplasty implantation. The aim of the study was to quantitatively evaluate the implant-bone stability of a cementless acetabular cup prosthesis by using a device based on resonance frequency analysis. The evaluation of this device was done by finite element analysis and in vitro experiments. It was shown that not all the resonance frequencies can be measured by our device. The resonance frequencies vary within the range of 500-3000Hz. The proposed power spectrum measurement gives the information about the absolute stiffness of the press-fit implant.