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

Muhammad Moid Khalid Khan*, Subodh Deshmukh, Kanthan Theivendran, Laura Leslie, S Junaid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Total joint arthroplasty procedures are increasing year on year, however, the complications that are associated with the joint arthroplasty remain. Using total elbow arthroplasty as a case study due to the high loosening rates, a technique has been further developed to accurately monitor the position of the prosthesis. Micromotion detection of endoprosthetic elbow prostheses is vital for longevity along with timely, adequate treatment. At present, radiographs are used to monitor the prostheses position at the macro-scale which lacks in early detection of prostheses loosening. In this work, a multiple magnetic sensor (multi-sensor) configuration was designed that can detect real-time micromotion of the elbow prosthesis without the use of radiographs. The proposed approach can detect 0.15 mm micromotion with an average error below 0.05 mm linearly. This method also eliminated the tilting effect and increase the sensitivity of the system to 18 mm along with improving the signal to noise ratio and reducing RMS error compared to a single sensor configuration.
Original languageEnglish
Pages (from-to)7208 - 7218
JournalIEEE Sensors Journal
Issue number7
Early online date18 Feb 2022
Publication statusPublished - 1 Apr 2022

Bibliographical note

Copyright © 2022, IEEE. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.

Funding Information: This work was supported in part by Aston University and in part by Sandwell and West Birmingham Hospital.


  • Aseptic loosening
  • joint arthroplasty
  • magnetic sensors array
  • non-radiographic detection


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