Iranian Journal of Orthopedic Surgery

The effect of 8 degree lateral wedge on energy consumption and displacement of the center of pressure in medial compartment knee osteoarthritis in frontal plane

Authors

Alireza Moazaz
Gholamreza Aminian
Roshanak Baghaie
Hoda Nabavi
https://doi.org/10.22034/ijos.2020.121326
Abstract
Background: Osteoarthritis is a physiological response to the longitudinal and repeated forces applied to the joint which is associated with an increase in energy consumption and changes in the rate of  displacement of the center of pressure in these patients. The purpose of the present study was to investigate the effect of 8 degree lateral wedge in medial compartment knee osteoarthritis energy consumption and displacement of the center of pressure in frontal plane.
Methods: The research design was quasi-experimental with a pretest - posttest. In this study, 26 patients with medial compartment knee osteoarthritis in the age (range of 40 to 60 years) were selected through available sampling. In order to measure the energy consumption the polar electro and measure displacement of the center of pressure the force plate apparatus were used. Participants were evaluated in two conditions with/without of using   lateral wedge during walking.
Results: The results showed that the mean of energy consumption and the displacement of the center of pressure decreased after using the lateral wedge. The average range of energy consumption before and after using the lateral wedge was respectively 0/381, 0/318 (p< 0/001), and displacement of the center of pressure was respectively 26/99, 17/23 (p< 0/001).
Conclusion: Use therapeutic interventions such as 8 degree lateral wedge may reduce energy consumption and displacement of the center of pressure of patients with medial compartment knee osteoarthritis.
 

Keywords

Knee osteoarthritis
energy consumption
velocity displacement of the center of pressure
8 degree lateral wedge

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