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P9.9 - SMART-HIP - Entwicklung und Auslegung eines Sensorsystems für die Messung der Verankerung von Implantaten

Event
12. Dresdner Sensor-Symposium 2015
2015-12-07 - 2015-12-09
Hotel Elbflorenz, Dresden
Chapter
P9. Sensoren in der Medizin
Author(s)
T. Bender, M. Sass, R. Bader, D. Kluess - Universitätsmedizin Rostock/D
Pages
332 - 336
DOI
10.5162/12dss2015/P9.9
ISBN
978-3-9813484-9-1
Price
free

Abstract

Loosening of total hip replacements (THR) is still the main reason for revision. Approximately 36,000 revisions are necessary in Germany per year. Due to low sensitivity of currently applied diagnostic methods, e.g. radiographs, the loosening status is often identified late. To optimize the accuracy, an acoustic method was investigated. Therefore, implants with an integrated magnetizable ball were inserted in artificial femoral bone models. The ball inside the implant was excited externally using a
pair of electromagnetic coils to produce an impingement of the ball and thus perform a sound analysis. In this study, a sensor array, which is based on the vibration and attenuation analysis, is used to classify three different levels of loosening.

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