Abstract
We performed a case-control study with the purpose of establishing the pressure patterns
in the soles of the feet of patients with ankle osteoarthritis, determining whether
the pattern changed after treating the arthritis with ankle joint fusion (arthrodesis),
and whether the change is significant. We also studied the benefits of ankle fusion
with respect to the Short-Form 36-item Health Survey and the American Orthopaedic
Foot and Ankle Society Ankle-Hindfoot scale. The study included 18 participants (9
in the study group and 9 in the control group) to reach statistical significance with
a 95% confidence interval (CI). A demonstrable increase was found in both forefoot
and hind-foot pressures in the study group preoperatively compared with the control
group. Also, a demonstrable increase was found in the pressure in both the forefoot
(mean difference 50.56 ± 267.39 kPa) and the hindfoot (mean difference 57.44 ± 160.27 kPa)
from preoperatively to postoperatively. This difference was not statistically significant
(p = .59 [t(8) = 0.57]; 95% CI 256.10 to −154.98) for the forefoot pressures and for
the hindfoot pressures (p = .31 [t(8) = 1.08]; 95% CI 180.64 to −65.76). The Short-Form 36-item scores significantly
improved from preoperatively to postoperatively (p = .000054 for the physical component and p = .018 for the mental component). The American Orthopaedic Foot and Ankle Society
Ankle-Hindfoot scale score also improved significantly (p = .0000005). The foot pressures, as measured by using the insole sensors, showed
an increase in forefoot and hindfoot pressures that was not statistically significant.
Level of Clinical Evidence
Keywords
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Article info
Footnotes
Financial Disclosure: None reported.
Conflict of Interest: None reported.
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