Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2009) 08, 247 - 251

Research article
Arthrometric Evaluation of Stabilizing Effect of Knee Functional Bracing at Different Flexion Angles
Saeedeh Seyed Mohseni1, Farzam Moss2, , Hossein Karimi3, Mohammad Kamali4
Author Information
1 Rehabilitation Research Center, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
2 School of Mechanical Engineering, Sharif University of Technology, RCSTIM, Tehran University of Medical Sciences, Tehran, Iran
3 Physiotherapy Department, College of Health Sciences, University of Sharjah, Sharjah, UAE
4 School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran

Farzam Moss
‚úČ School of Mechanical Engineering, Sharif University of Technology, Azadi Ave, Tehran, Iran.
Email: farahmand@sharif.edu
Publish Date
Received: 30-10-2008
Accepted: 18-03-2009
Published (online): 01-06-2009
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ABSTRACT

Previous in-vivo investigations on the stabilizing efficacy of knee bracing for ACL reconstructed patients have been often limited to 20-30 degrees of knee flexion. In this study, the effectiveness of a uniaxial hinged functional brace to improve the knee stability was assessed at 30, 60 and 90 degrees of knee flexion. Arthrometry tests were conducted on 15 healthy subjects before and following wearing the brace and the tibial displacements were measured at up to 150 N anterior forces. Results indicated that functional bracing has a significant stabilizing effect throughout the range of knee flexion examined (p < 0.05). The rate of effectiveness, however, was not consistent across the flexion range, e.g., 50% at 30 degrees and only 4% at 90 degrees. It was suggested that accurate sizing and fitting as well as attention to correct hinge placement relative to the femoral condyles can limit brace migration and improve its effectiveness in mid and deep knee flexion. With using adaptive limb fittings, through flexible pads, and a polycentric joint a more significant improvement of the overall brace performance and efficacy might be obtained.

Key words: Functional brace, knee, ACL injury, instability, arthrometery


           Key Points
  • Functional bracing improves the knee joint stability mostly in extension posture.
  • Unlike the non-braced condition, the least knee joint stability appears in mid and deep flexion angles when using a hinged brace.
  • Accurate sizing and fitting and attention to correct hinge placement relative to the femoral condyles can limit brace migration and improve its effectiveness in mid and deep knee flexion.
  • The overall brace performance and efficacy might be improved significantly using adaptive limb fittings through flexible pads and/or polycentric joints.
 
 
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