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Advances in Orthopedics
Volume 2012 (2012), Article ID 104927, 6 pages
http://dx.doi.org/10.1155/2012/104927
Research Article

Design and Evaluation of a New Type of Knee Orthosis to Align the Mediolateral Angle of the Knee Joint with Osteoarthritis

1Mechanical Engineering Department, Isfahan University of Technology, Isfahan, Iran
2Orthotics and Prosthetics Department, Rehabilitation Faculty, Isfahan University of Medical Sciences, P.O. Box 81745-164, Isfahan, Iran
3Biomechanical Engineering Department, Malaya University, Kuala Lumpur, Malaysia

Received 3 December 2011; Revised 19 December 2011; Accepted 3 January 2012

Academic Editor: Masato Takao

Copyright © 2012 Amir Esrafilian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Osteoarthritis (OA) is a disease which influences the performance of the knee joint. Moreover, the force and moments applied on the joint increase in contrast to normal subjects. Various types of knee orthoses have been designed to solve the mentioned problems. However, there are other problems in terms of distal migration during walking and the alignment of the orthosis which cannot be changed following the use of brace. Therefore, the main aim of the research was to design an orthosis to solve the aforementioned problems. Method. A new type of knee orthosis was designed with a modular structure. Two patients with knee OA participated in this research project. The force applied on the foot, moment transmitted through the knee joint, and spatiotemporal gait parameters were measured by use of a motion analysis system. Results. The results of the research showed that the adduction moment applied on the knee joint decreased while subjects walked with the new knee orthosis (P-value < 0.05). Conclusion. The new design of the knee brace can be used as an effective treatment to decrease the loads applied on the knee joint and to improve the alignment whilst walking.