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Finite Element Analysis into Eigenfrequencies of a Total Hip Stem with Different Levels of Loosening

T. Bender [1], M. Sass [1], W. Mittelmeier [1], R. Bader [1], D. Kluess [1]
[1] Department of Orthopaedics Research Laboratory for Biomechanics & Implant Technology, University Medicine Rostock, Rostock, Germany
Veröffentlicht in 2015

A finite element model of a total hip replacement (THR) has been developed from the approach of modal analysis. The model is capable of determining the first 15 Eigenmodes of a THR with an artificial bone model. The model was equipped with several different defects to simulate a loosening of THR and to enforce a shifting of the frequency spectrum of the system’s Eigenfrequencies. Using the preliminary findings from the shifting of the frequency spectrum a classification of defects is to be created to get knowledge and experience of the level of loosening.

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