Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Principle of the new sensor system for diagnosing aseptic loosening, e.g., applied in the total hip stem. Left: Hip stem with integrated membranes. Middle: Sensor principle with close bone contact. Right: Sensor principle with loosening layer (fibrous layer).

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Overdimensioned experimental setup to validate the functionality of the sensor principle

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Trigger circuit to control the excitation (L1) and the detection coil (L2)

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Cross-section of the overdimensioned model with the material layers attached to investigate different loosening phases

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Material layers to be attached on the external side of the membrane. Left: Water-filled pad with artificial bone. Right: Simulated partial osteolysis.

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Characteristic velocity signal of the oscillator recorded by the detection coil. The first negative peak is the maximum velocity of the oscillator after impingement on the membrane (n = 20).

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Maximum velocity after impingement of the oscillator on the membrane for different attached material layers simulating various implant loosening progression stages (n = 20)

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: Frequency spectrum of the oscillator signal with the eigenfrequency at 67 Hz and the first harmonic at 134 Hz

Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: A Novel Sensor Concept for Optimization of Loosening Diagnostics in Total Hip Replacement J Biomech Eng. 2011;133(10):104503-104503-5. doi:10.1115/1.4005222 Figure Legend: The amplitude in the frequency spectrum when testing with different material layers (n = 20)