| Title | Concept, design and fabrication of smart orthopedic implants |
| Publication Type | Journal Article |
| 2000 |
| Authors | Burny, F, Donkerwolcke, M, Moulart, F, Bourgois, R, Puers, R, Van Schuylenbergh, K, Barbosa, M, Paiva, O, Rodes, F, Bégueret, JB, Lawes, P |
| Journal | Medical Engineering and PhysicsMed. Eng. Phys. |
| Volume | 22 |
| Issue | 7 |
| Pagination | 469 - 479 |
| Date Published | 2000/// |
| 13504533 (ISSN) |
| article, atomic absorption spectrometry, Biocompatible Materials, biomechanics, body movement, Bone Plates, ceramics, compression, Corrosion, Failure of implants, Femoral Fractures, femur, Fracture healing, healing, Humans, materials testing, metal, metal implantation, Metals, microcomputer, Microscopy, Electron, Scanning, Monitoring, Physiologic, Orthopedic implants, orthopedic surgery, priority journal, Prostheses and Implants, Prosthesis Design, prosthesis failure, Rehabilitation, Scanning electron microscopy, sensor, Sensors, Smart implants, Spectrum Analysis, Stainless steel, strain gauge transducer, Strain measurements, Stress, Mechanical, Telemetry, Weight-Bearing |
| Extensive clinical experience has been built up using orthopaedic implants instrumented with strain gauges connected to a Wheatstone bridge by means of percutaneous leads. This research showed the medical relevance of the monitoring of the deformation of implants as a powerful tool to evaluate nursing and rehabilitation exercises, for tracing dangerous overloads and anticipating implant failure and also to observe the healing process. The IMPACT 3500 project focuses on the instrumentation of femoral implants with on board sensors: regular Benoist-Girard implants have been modified, to contain a 'sensing cell', and thoroughly tested in vitro and in vivo. The implant deformations are measured with resistive strain gauges, and the signal is transferred to a personal computer for processing and display, via a hard wired connection, or via a telemetry system. Two fully implantable wireless designs, called Linkstrain and Sealstrain, are powered from the outside by magnetic induction. As Sealstrain contains the whole telemetric system in its cavity, the highest miniaturization was required; this seriously deteriorates the efficiency of the inductive power link. © 2001 IPEM. |
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