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Three-dimensional electrogoniometric study of selected knee orthoses.

D J Pratt1

  • 1Orthotic and Disability Research Centre, Derbyshire Royal Infirmary, UK.

Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
PubMed
Summary

This study evaluated six knee orthoses during walking. Rigid orthoses offered better support than simple ones, but all had limitations in controlling complex knee movements.

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Area of Science:

  • Biomechanics
  • Orthotics and Prosthetics

Background:

  • Knee orthoses are crucial for supporting patients with knee instability.
  • Quantitative data on the functional performance of various knee orthoses during ambulation is limited.

Purpose of the Study:

  • To quantitatively assess the functional performance of six selected knee orthoses during normal level walking.
  • To compare the efficacy of different knee orthosis designs in controlling knee motion.

Main Methods:

  • A 9-dimensional (9-D) electrogoniometric study was conducted with ten subjects.
  • Six knee orthoses (Cinch, Fastwrap, Drop-lok, Lerman Multi-ligamentous, Donjoy 4pt, and Flex 10) were evaluated using a TRIAX electrogoniometer.

Main Results:

  • Simple orthoses provided minimal support and could restrict knee flexion significantly, even when unlocked.
  • More rigid orthoses demonstrated superior performance but offered limited control of knee adduction and internal rotation unless locked.
  • Significant limitations in controlling translational and rotational knee movements were observed across most tested orthoses.

Conclusions:

  • The study highlights the need for improved knee orthosis designs that offer comprehensive control over multi-dimensional knee motion.
  • Further research with advanced measurement techniques and diverse activities is recommended to fully understand orthotic efficacy.

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