Evaluation of acetabular cup initial fixation by using resonance frequency principle

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 stabilit...

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Veröffentlicht in:	Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 2015-01, Vol.229 (1), p.3-8
Hauptverfasser:	Henys, Petr, Capek, Lukas, Fencl, Jaroslav, Prochazka, Egon
Format:	Artikel
Sprache:	eng
Schlagworte:	Acetabulum - physiology Acetabulum - surgery Arthroplasty, Replacement, Hip - instrumentation Arthroplasty, Replacement, Hip - methods Clinical medicine Computer Simulation Cups Devices Dislocations Elastic Modulus - physiology Equipment Failure Analysis - methods Failure Finite Element Analysis Frequencies Hip Prosthesis Humans Implantation Joint replacement surgery Loosening Male Medical devices Middle Aged Models, Biological Oscillometry - methods Prosthesis Fitting - methods Reproducibility of Results Sensitivity and Specificity Spectrum analysis Stress, Mechanical Surgical implants Transplants & implants Vibration
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Beschreibung
Zusammenfassung:	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 500–3000 Hz. The proposed power spectrum measurement gives the information about the absolute stiffness of the press-fit implant.
ISSN:	0954-4119 2041-3033
DOI:	10.1177/0954411914561485