Medial meniscus extrusion during gait is associated with decrease in knee rotation in early-stage knee osteoarthritis

Okamoto Saeko

Ishii Yosuke

Kono Yoshifumi

Hashizume Takato

Okinaka Riko

Nakashima Yuko

Kamei Goki

Nekomoto Akinori

Takahashi Makoto

Adachi Nobuo

Gait & Posture

Background
In patients with medial knee osteoarthritis (OA), medial meniscus extrusion during gait is aggravated by mechanical stress, such as knee adduction moment (KAM). Conversely, the decrease in the range of knee rotation during stance phase is also one of the important issues in early knee OA, whereas the correlation between medial meniscus extrusion and knee rotation during gait are unclear.
Research question
To investigate the correlation between increase in medial meniscus extrusion and range of knee rotation during gait in patients with early- and late-stage of knee OA.
Methods
Forty patients with medial knee OA were enrolled and divided into early- and late-OA group by Kellgren-Lawrence grading scale. During gait tasks, the extent of medial meniscus extrusion was measured using ultrasonography and kinetic/kinematic data were measured using three-dimensional motion analysis system. The correlation between medial meniscus extrusion and the range of knee rotation or KAM were evaluated in the overall, early-, and late- OA groups.
Results
A significant negative correlation was observed between an increase in medial meniscus extrusion and range of knee rotation angle in early-OA group only. However, an increase in medial meniscus extrusion significantly correlated with the second KAM peak in the overall and early-OA groups.
Significance
The decrease in range of knee rotation during stance phase may be associated with the increase in medial meniscus extrusion during gait in patients with early knee OA.

Medial meniscus extrusion

range of knee rotation angle

medial knee osteoarthritis

ultrasonography

eng

Elsevier

© 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

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[DOI] https://doi.org/10.1016/j.gaitpost.2024.02.020 isVersionOf