Highlights
- •Higher peak knee adduction moment is linked to 3-year medial joint space narrowing.
- •Mid-stance knee adduction moment unloading may not be relevant to structural progression.
- •The link between the knee rotation moment and structural progression requires further research.
- •Differences in activation of the lateral muscles may contribute to structural degradation.
Abstract
Background
It is currently not known if there are different mechanical factors involved in accelerated
rates of knee osteoarthritis structural progression. Data regarding the role of the
transverse plane moment along with the contributions to joint loading from muscle
activity, a primary contributor to the joint loading environment, is not well represented
in the current literature on knee OA radiographic progression. The objective of this
study was to understand if a 3-year end point corroborates what has been shown for
longer term radiographic progression or provides more insight into factors that may
be implicated in more accelerated radiographic progression than those shown previously.
Methods
52 participants visited the Dynamics of Human Motion laboratory at baseline for three-dimensional,
self-selected speed over ground walking gait analysis. Differences in magnitude and
patterns of 3D knee moments and electromyography waveforms between participants who
progressed radiographically from those that did not were compared using t-tests (P < 0.05).
Findings
Features of the frontal and transverse plane knee moments along with muscle activation
patterns for the lateral gastrocnemius and lateral hamstrings differentiated the progression
group from the non-progression group at baseline.
Interpretation
In general, the walking gait biomechanics of the progression group in this 3-year
radiographic study aligned well with previously reported characteristics of diagnosed
or symptomatic osteoarthritis. The higher rotation moment range during stance found
with the progression group is a novel finding that points to a need to better understand
torsional joint loading and its implications for loading of the knee joint tissues.
Keywords
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Article info
Publication history
Published online: December 19, 2018
Accepted:
December 19,
2018
Received:
January 18,
2017
Identification
Copyright
© 2018 Elsevier Ltd. All rights reserved.
