Alireza Moazaz; Gholamreza Aminian; Roshanak Baghaie; Hoda Nabavi
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 ...
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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.
Farshad Safdari, MSc; Gholamreza Aminian, PhD; Mahmoud Bahramizadeh, PhD; Seyyed Ebrahim Mousavi, MD; Seyyed Morteza Kazemi, MD; Naser Valai; Farhood Ershadi, MSc; Mohammad Sadeghzadeh, Msc
Abstract
Background: There are different conservative treatments for the osteoarthritis of the medial compartment of the knee and valgus bracing is considered as important one. The purpose of current study was to examine the efficacy of the brace unloading in changing floor reaction force.Methods: Ten patients ...
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Background: There are different conservative treatments for the osteoarthritis of the medial compartment of the knee and valgus bracing is considered as important one. The purpose of current study was to examine the efficacy of the brace unloading in changing floor reaction force.Methods: Ten patients with osteoarthritis in medial compartment of the knee contributed in this quasi-experimental study with and without using knee braces. The magnitude of the mediolateral vector of the ground reaction force and center of pressure displacement in mediolateral direction were measured by using a force plate system (Kistler, Swiss). Statistical tests were used to analyze the data.Results: The mean of displacement of center of pressure (COP) was 25 mm and 5 mm with and without brace, respectively (p < /em>≥.05). The mean of mediolateral vector of the ground reaction force was 28.17 with and 22.45 without brace and there was no significant difference (p < /em>≥.05). In contrast, there was a significant difference between the magnitudes of the mediolateral vector of the ground reaction force within pre-and post-brace situations (p < /em>=.000).Conclusion: Valgus bracing can reduce the magnitude of the mediolateral vector of the ground reaction force and displacement of the COP in the mediolateral direction. It might be concluded that this method can reduce the pain and instability and improve function in patients with osteoarthritis of the medial compartment of the knee.
