Journal of Rehabilitation Research & Development (JRRD)

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Effect of prosthetic design on center of pressure excursion in partial foot prostheses

Michael P. Dillon, PhD, BPO(Hons), et al.


Experimental prosthesis, including pelite liner, laminated socket, and leg shells with Velcro closures. Camber-axis joints are joined to socket (inferiorly) and anterior leg shell (proximally). Distal forefoot includes series of band saw cuts to allow forefoot to deform to desired roll-over shape. Note the plastic shims that could be fully inserted into every second cut to obtain ???stiff??? forefoot condition. Removal of all shims created ???compliant??? forefoot condition. Retroreflective markers were screwed into joint axes during static trials (as pictured). During dynamic trials, medial retroreflective marker was replaced with screw and locking washer.

Research on the gait of people with partial foot amputation suggests that effective foot length can be restored if the prosthesis has a stiff forefoot, has an above-ankle anterior shell, and restricts dorsiflexion. By independently manipulating these design features of the prosthesis in two participants with partial foot amputation, we showed (using three-dimensional motion analysis) that the prosthesis must include each of these design features to restore effective foot length. When these design features were used at the same time, the participants' gait pattern was more like that of people without limb loss.

Volume 48 Number 2, 2011
   Pages 161 — 178


View HTML  ¦  View PDF  ¦  Contents Vol. 48, No. 2
This article and any supplementary material should be cited as follows:
Dillon MP, Fatone S, Hansen AH. Effect of prosthetic design on center of pressure excursion in partial foot prostheses. J Rehabil Res Dev. 2011;48(2):161-78.DOI:10.1682/JRRD.2010.09.0167
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Last Reviewed or Updated  Thursday, February 10, 2011 9:26 AM

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