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Meniscal movement. An in-vivo study using dynamic MRI.

V Vedi¹, A Williams, S J Tennant

¹Department of Orthopaedics, St Mary's Hospital, London, England, UK.

The Journal of Bone and Joint Surgery. British Volume

|March 6, 1999

Summary

This summary is machine-generated.

This study reveals how knee meniscus moves under load. Weight-bearing significantly impacts the anterior horn of the lateral meniscus, showing greater movement and height changes.

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Area of Science:

Orthopedics
Biomechanics
Medical Imaging

Background:

Meniscal movement under physiological load is not well understood.
Previous studies lacked in vivo imaging capabilities in functional positions.

Purpose of the Study:

To investigate in vivo meniscal movement in normal knees under weight-bearing and non-weight-bearing conditions.
To quantify the excursion, radial displacement, and height changes of meniscal horns.

Main Methods:

Open MRI scanner used for near real-time imaging.
16 young footballers scanned during knee flexion (extension to 90 degrees).
Measurements included meniscal horn excursion, radial displacement, and height.

Main Results:

Significant differences observed in meniscal movement between weight-bearing and non-weight-bearing states.
Lateral meniscus anterior horn showed the most pronounced changes in movement and height.
Specific measurements detailed for anterior/posterior horns of medial and lateral menisci under both conditions.

Conclusions:

Weight-bearing significantly influences meniscal kinematics, particularly the lateral meniscus anterior horn.
This study provides crucial in vivo data on normal knee biomechanics.
Findings may inform understanding of meniscal injuries and treatment strategies.