Enclosed Electronic System for Force Measurements in Knee Implants
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 s...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-08-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/14/8/15009 |
| _version_ | 1828279394372681728 |
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| author | David Forchelet Matteo Simoncini Arash Arami Arnaud Bertsch Eric Meurville Kamiar Aminian Peter Ryser Philippe Renaud |
| author_facet | David Forchelet Matteo Simoncini Arash Arami Arnaud Bertsch Eric Meurville Kamiar Aminian Peter Ryser Philippe Renaud |
| author_sort | David Forchelet |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T07:42:19Z |
| format | Article |
| id | doaj.art-54b352c62ed7474dba9094dac8314a2e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:42:19Z |
| publishDate | 2014-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-54b352c62ed7474dba9094dac8314a2e2022-12-22T02:55:49ZengMDPI AGSensors1424-82202014-08-01148150091502110.3390/s140815009s140815009Enclosed Electronic System for Force Measurements in Knee ImplantsDavid Forchelet0Matteo Simoncini1Arash Arami2Arnaud Bertsch3Eric Meurville4Kamiar Aminian5Peter Ryser6Philippe Renaud7Microsystems Laboratory (LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandLaboratory of Microengineering for Manufacturing (LPM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandLaboratory of Movement Analysis and Measurement (LMAM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandMicrosystems Laboratory (LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandLaboratory of Microengineering for Manufacturing (LPM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandLaboratory of Movement Analysis and Measurement (LMAM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandLaboratory of Microengineering for Manufacturing (LPM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandMicrosystems Laboratory (LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, SwitzerlandTotal 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.http://www.mdpi.com/1424-8220/14/8/15009total joint arthroplastystrain sensorload monitoringinstrumented implantbiomechanics |
| spellingShingle | David Forchelet Matteo Simoncini Arash Arami Arnaud Bertsch Eric Meurville Kamiar Aminian Peter Ryser Philippe Renaud Enclosed Electronic System for Force Measurements in Knee Implants Sensors total joint arthroplasty strain sensor load monitoring instrumented implant biomechanics |
| title | Enclosed Electronic System for Force Measurements in Knee Implants |
| title_full | Enclosed Electronic System for Force Measurements in Knee Implants |
| title_fullStr | Enclosed Electronic System for Force Measurements in Knee Implants |
| title_full_unstemmed | Enclosed Electronic System for Force Measurements in Knee Implants |
| title_short | Enclosed Electronic System for Force Measurements in Knee Implants |
| title_sort | enclosed electronic system for force measurements in knee implants |
| topic | total joint arthroplasty strain sensor load monitoring instrumented implant biomechanics |
| url | http://www.mdpi.com/1424-8220/14/8/15009 |
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