Low-firing thick-film piezoresistive sensors for medical instruments

In this work, a low-firing thick-film materials system allowing fabrication of piezoresistive sensors on surgical alloys is presented in detail, with application to a force-sensing surgical instrument. The system comprises a series of individual thick-film dielectric, conductor, resistive and overglaze compositions based on a lead borosilicate glass matrix. The moderate achieved firing temperature, around 625°C, greatly increases compatibility with metallic substrates, allowing the use of high-strength medical alloys with low thermal degradation. Specific fillers for the dielectric layers increase adhesion on steel substrates and allow thermal matching to austenitic and ferritic / martensitic steels, as well as titanium alloys. The functionality of this materials system is successfully demonstrated here by implementing it into a previously developed ligament-balancing force sensor for total knee arthroplasty (TKA) [1]. Keywords: Medical operations; total knee arthroplasty; thick-film force sensors; medical alloys


Published in:
Procedia Engineering, 5, 1140-1143
Presented at:
Eurosensors XXIV, Linz, Austria, 5-9.9.2010
Year:
2010
Publisher:
Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa
ISSN:
1877-7058
Keywords:
Note:
Publié en version étendue dans Sensors & Actuators A : https://infoscience.epfl.ch/record/166150
Laboratories:




 Record created 2010-12-12, last modified 2018-01-28

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