Next Article in Journal
Fault Detection of a Roller-Bearing System through the EMD of a Wavelet Denoised Signal
Next Article in Special Issue
Development of Clinically Relevant Implantable Pressure Sensors: Perspectives and Challenges
Previous Article in Journal
Automated In-Situ Laser Scanner for Monitoring Forest Leaf Area Index
Previous Article in Special Issue
Implantable Impedance Plethysmography
Article Menu

Export Article

Open AccessArticle
Sensors 2014, 14(8), 15009-15021; doi:10.3390/s140815009

Enclosed Electronic System for Force Measurements in Knee Implants

1
Microsystems Laboratory (LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
2
Laboratory of Microengineering for Manufacturing (LPM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
3
Laboratory of Movement Analysis and Measurement (LMAM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
*
Author to whom correspondence should be addressed.
Received: 19 June 2014 / Revised: 5 August 2014 / Accepted: 12 August 2014 / Published: 14 August 2014
(This article belongs to the Special Issue Implantable Sensors)
View Full-Text   |   Download PDF [3675 KB, uploaded 14 August 2014]   |  

Abstract

Total knee arthroplasty is a widely performed surgical technique. Soft tissue force balancing during the operation relies strongly on the experience of the surgeon in equilibrating tension in the collateral ligaments. Little information on the forces in the implanted prosthesis is available during surgery and post-operative treatment. This paper presents the design, fabrication and testing of an instrumented insert performing force measurements in a knee prosthesis. The insert contains a closed structure composed of printed circuit boards and incorporates a microfabricated polyimide thin-film piezoresistive strain sensor for each condylar compartment. The sensor is tested in a mechanical knee simulator that mimics in-vivo conditions. For characterization purposes, static and dynamic load patterns are applied to the instrumented insert. Results show that the sensors are able to measure forces up to 1.5 times body weight with a sensitivity fitting the requirements for the proposed use. Dynamic testing of the insert shows a good tracking of slow and fast changing forces in the knee prosthesis by the sensors. View Full-Text
Keywords: total joint arthroplasty; strain sensor; load monitoring; instrumented implant; biomechanics total joint arthroplasty; strain sensor; load monitoring; instrumented implant; biomechanics
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Forchelet, D.; Simoncini, M.; Arami, A.; Bertsch, A.; Meurville, E.; Aminian, K.; Ryser, P.; Renaud, P. Enclosed Electronic System for Force Measurements in Knee Implants. Sensors 2014, 14, 15009-15021.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top