Concept, design and fabrication of smart orthopedic implants

• Type: Article in International Scientific Journal
• Date: 2000

Authors

F. Burny (Author) Other; M. Donkerwolcke (Author) Other; F. Moulart (Author) Other; R. Bourgois (Author) Other; R. Puers (Author) Other; K. Van Schuylenbergh (Author) Other; Mário Adolfo Barbosa (Author) FEUP; O. Paiva (Author) Other; F. Rodes (Author) Other; J. B. Bégueret (Author) Other; P. Lawes (Author) Other

Journal

Title: Medical Engineering & Physics

Vol. 22 No. 7

Pages: 469-479

ISSN: 1350-4533

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 39 Citations

Scopus - 44 Citations

Other information

Authenticus ID: P-000-Z56

DOI: 10.1016/s1350-4533(00)00062-x

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11