Some problems in using a polyvinylidene fluoride transducer for the intra-articular determination of joint contact stress

J. E. Hale, C. L. Vaughan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A piezoelectric transducer and associated instrumentation were developed and evaluated as a means of experimentally determining joint contact stress. Each transducer, fabricated from a polyvinylidene fluoride film, comprised four discrete sensing elements. Following dynamic calibration of all sensing elements, in vitro evaluations were performed with transducers positioned in canine tibio-femoral joints. Quantitative measurements of contact stress as a function of time were obtained using these transducers, the magnitudes of which ranged between 0.01 and 7.99 MPa. Limitations associated with the transducer material and its use in this specific application included calibration variability and temporal phase shift of the transducer output signal relative to the applied load.

Original languageEnglish (US)
Pages (from-to)127-131
Number of pages5
JournalProceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
Volume207
Issue number2
DOIs
StatePublished - Jun 1993

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