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Sagittal plane position of the functional joint centre of prosthetic foot-ankle mechanisms
Högskolan i Jönköping, Hälsohögskolan, HHJ. Ortopedteknisk plattform. Högskolan i Jönköping, Hälsohögskolan, HHJ, Avd. för rehabilitering.ORCID-id: 0000-0002-0220-6278
Högskolan i Jönköping, Hälsohögskolan, HHJ. Ortopedteknisk plattform. Högskolan i Jönköping, Hälsohögskolan, HHJ, Avd. för rehabilitering.
2010 (engelsk)Inngår i: Clinical Biomechanics, ISSN 0268-0033, E-ISSN 1879-1271, Vol. 25, nr 7, s. 713-720Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: The use of motion analysis techniques in amputee rehabilitation often utilizes kinematic data from the prosthetic limb. A problem with methods currently used is that the joint positions of the prosthetic ankle are assumed to be in the same position as that of an intact ankle. The aim of this study was to identify both traditional anatomical joint centres as well as functional joint centres in a selection of commonly used prosthetic feet. These coordinates were then compared across feet and compared to the contralateral intact ankle joint.

Methods: Six prosthetic feet were !t to a unilateral trans-tibial amputee on two separate occasions. The subject's intact limb was used as a control. Three-dimensional kinematics were collected to determine the sagittal position of the functional joint centre for the feet investigated.

Findings: None of the prosthetic feet had a functional joint centre that was within the 95% CI for that of an intact ankle (both x- and y-coordinate position), nor any of the other prosthetic feet investigated. The repeatability of the method was found to be adequate, with 95% CI of the difference (test–retest) of the prosthetic feet similar to that for the intact ankle and within clinically accepted levels of variability.

Interpretation: The motion of the prosthetic feet tested is clearly different from that of an intact ankle. Kinematic methods that assume ankle constraints based on an intact ankle are subject to systematic error as this does not refect the real motion of the prosthetic foot.

sted, utgiver, år, opplag, sider
Elsevier, 2010. Vol. 25, nr 7, s. 713-720
Emneord [en]
Functional joint centre, Artificial-limb, Kinematics, Marker placement
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-12186DOI: 10.1016/j.clinbiomech.2010.04.005ISI: 000280681100015PubMedID: 20471145Scopus ID: 2-s2.0-77955653848OAI: oai:DiVA.org:hj-12186DiVA, id: diva2:319910
Tilgjengelig fra: 2010-05-20 Laget: 2010-05-20 Sist oppdatert: 2019-09-02bibliografisk kontrollert

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