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Feasibility of detecting orthopaedic screw overtightening using acoustic emission

Pullin, Rhys, Wright, Bryan J., Kapur, Richard, McCrory, John, Pearson, Matthew R., Evans, Samuel Lewin and Crivelli, Davide 2017. Feasibility of detecting orthopaedic screw overtightening using acoustic emission. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 231 (3) , pp. 213-221. 10.1177/0954411916689112

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Abstract

A preliminary study of acoustic emission during orthopaedic screw fixation was performed using polyurethane foam as the bone-simulating material. Three sets of screws, a dynamic hip screw, a small fragment screw and a large fragment screw, were investigated, monitoring acoustic-emission activity during the screw tightening. In some specimens, screws were deliberately overtightened in order to investigate the feasibility of detecting the stripping torque in advance. One set of data was supported by load cell measurements to directly measure the axial load through the screw. Data showed that acoustic emission can give good indications of impending screw stripping; such indications are not available to the surgeon at the current state of the art using traditional torque measuring devices, and current practice relies on the surgeon’s experience alone. The results suggest that acoustic emission may have the potential to prevent screw overtightening and bone tissue damage, eliminating one of the commonest sources of human error in such scenarios.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Engineering
Subjects: T Technology > TJ Mechanical engineering and machinery
Uncontrolled Keywords: Acoustic emission, biomedical devices, medical signal processing, orthopaedic procedures, orthopaedic screws
Publisher: Sage
ISSN: 0954-4119
Last Modified: 28 Sep 2018 19:11
URI: http://orca.cf.ac.uk/id/eprint/97826

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