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The invention describes a system, which is used to monitor the ingrown and loosening status of an implant.
To achieve this, body sound and ultrasound sensors are placed on the surface of the prosthetic. These sensors are able to detect micro friction processes, caused by a relative movement between the artificial hip and the surrounding soft and hard tissue. In addition, the system is capable of using ultrasound to monitor the ingrown and loosening status.
By doing so, the invention delivers a measurement system for a non invasive and radiation free examination of the loosening and the ingrown status of hip replacement implants. This system would be able to reduce the number of unnecessary revision surgeries and thus could be able to reduce the costs caused by such opera-tions.
The invention delivers a new constructive design of the ultrasonic transducers to enhance the usability of ultrasonic material testing. The device described in the invention is constructed with a great number of piezo electric transducers on the surface of the probe. Those piezo electric elements are placed like mosaics on a flexible surface, which is placed on a rodshaped carrier. This surface is now able to adapt to the surface of the testing body, which means that a great number of complex surfaces can be tested with this system.
The carrier includes several channels, which are able to constantly supply the ultrasonic transducers with a gel. This gel is used as the coupling agent for an opti-mized sound transfer.