A New Diagnostic Technique to Detect Early Migration of Joint Prostheses

Development of a Multi-Sensor Array for Non-Radiographic Micromotion Detection of Joint Prostheses

“…The selection of the magnetic system was based on the human body's transparency towards magnetic fields and the negligible effect of prosthesis material on magnetic flow. The negligible effect of the prosthesis materials was verified by Arami et al [33]. In this study, a compact 3D magnetic sensor (Infineon, TLV493D) with digital output via the I2C bus was used to detect the position of the implant and its motion at submillimeter level via measuring the magnetic field intensity emitted from the magnet in 3 orthogonal directions, having resolution of 0.3mm linear and 0.5-degree angular detection [33].…”

“…The negligible effect of the prosthesis materials was verified by Arami et al [33]. In this study, a compact 3D magnetic sensor (Infineon, TLV493D) with digital output via the I2C bus was used to detect the position of the implant and its motion at submillimeter level via measuring the magnetic field intensity emitted from the magnet in 3 orthogonal directions, having resolution of 0.3mm linear and 0.5-degree angular detection [33]. In this paper, position is defined as the absolute location of the sensor with respect to the magnet and micromotion is defined as the sub-millimeter relative movement of the implant.…”

“…This study proposes a micromotion detection technique for monitoring joint replacements based on magnetic field detection. Multiple sensor configurations were investigated to build on a single sensor configuration (Khan et al 2021) to achieve sub-millimeter motion detection and to improve on the system's tilting effect, resolution, sensitivity, working range, and signal to noise ratio.…”

“…Consequently, the migration of the humeral component results in a change of the magnetic field which was measured by the sensors. The feasibility of such a magnetic measuring system has previously been described in Khan et al (2021) [32] demonstrating a 0.3 mm linear migration using a single sensor configuration. The paper also describes a negligible effect found from biomaterials on detection.…”

A nonradiographic strategy to real‐time monitor the position of three‐dimensional‐printed medical orthopedic implants by embedding superparamagnetic Fe3O4 particles

“…[6] Some nonradiographic composed of magnets and sensors were invented in the field of orthopedic prosthesis. [7,8] Nevertheless, the hazard of magnet exposure to human tissue cannot be dismissed lightly, and the wire connected to external power is deemed impractical. However, those radiographic investigations require special equipment and surgeons' professional experience and with a key inability to provide timely feedback in daily rehabilitation, [9] indicating the inconvenience for patients in both space and rehabilitation adjustment aspects.…”