A Continuous Loading Apparatus for Measuring Three-dimensional Stiffness of Ankle-Foot Orthoses

A Continuous Loading Apparatus for Measuring Three-dimensional Stiffness of Ankle-Foot Orthoses

This paper describes a novel device to evaluate the mechanical properties of ankle foot orthoses (AFOs). The apparatus permits the application to AFOs of continuous three-dimensional (3D) movements between specified and settable endpoints. Using an x-y robot with a rotary stage and a six-component l...

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Veröffentlicht in:Journal of biomechanical engineering 2005-11, Vol.127 (6), p.1025-1029
Hauptverfasser: Cappa, Paolo, Patanè, Fabrizio, Di Rosa, Giuseppe
Format: Artikel
Sprache:eng
Schlagworte:
Ankle - physiopathology
Elasticity
Equipment Design
Equipment Failure Analysis - instrumentation
Equipment Failure Analysis - methods
Foot - physiology
Orthotic Devices
Prosthesis Design
Stress, Mechanical
Weight-Bearing
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container_end_page 1029
container_issue 6
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container_title Journal of biomechanical engineering
container_volume 127
creator Cappa, Paolo
Patanè, Fabrizio
Di Rosa, Giuseppe
description This paper describes a novel device to evaluate the mechanical properties of ankle foot orthoses (AFOs). The apparatus permits the application to AFOs of continuous three-dimensional (3D) movements between specified and settable endpoints. Using an x-y robot with a rotary stage and a six-component load cell, characteristic displacement versus reaction force curves can be generated and consequently the ankle moments can be determined as a function of dorsi/plantar flexion, inv/eversion and int/external rotation. Representative curves for two polypropylene lateral leaf AFOs, different in shape but produced for the same leg by a skilled orthotist, are presented to illustrate the capabilities of the novel testing system. The metrological investigation showed that the apparatus creates a highly repeatable data set (uncertainty ⩽1% FSO).
doi_str_mv 10.1115/1.2049313
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source MEDLINE; ASME Transactions Journals (Current)
subjects Ankle - physiopathology
Elasticity
Equipment Design
Equipment Failure Analysis - instrumentation
Equipment Failure Analysis - methods
Foot - physiology
Orthotic Devices
Prosthesis Design
Stress, Mechanical
Weight-Bearing
title A Continuous Loading Apparatus for Measuring Three-dimensional Stiffness of Ankle-Foot Orthoses
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