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Rheumatology 2001; 40: 499-505
© 2001 British Society for Rheumatology

Original Papers

Relationships among bone mineral densities, static alignment and dynamic load in patients with medial compartment knee osteoarthritis

M. Wada, Y. Maezawa1, H. Baba1, S. Shimada, S. Sasaki and Y. Nose

Division of Rehabilitation Medicine, Fukui Medical University, Fukui and
1 Department of Orthopaedic Surgery, Fukui Medical University, Fukui, Japan

Objective. To investigate the relationships among bone mineral density (BMD), static alignment and the adduction moment of the knee in patients with tibiofemoral osteoarthritis (OA).

Methods. Sixty-nine patients with medial compartment knee OA underwent radiographic evaluation, gait analysis and BMD measurements at the proximal tibia and lumbar spine.

Results. The bone mineral distribution of the medial to lateral part of the proximal tibia correlated significantly with the peak knee adduction moment and the mechanical axis. Furthermore, the adduction moment correlated significantly with the mechanical axis. However, the BMD of the lumbar spine and the bone mineral distribution of the posterior to anterior part of the proximal tibia did not correlate with any other measurement.

Conclusions. Our results suggest that the bone mineral distribution of the proximal tibia is directly affected but lumbar BMD is not influenced by the local mechanical stress around the knee with medial compartment OA.

KEY WORDS: Bone mineral density, Alignment, Knee osteoarthritis, Mechanical load.

Correspondence to: M. Wada, Division of Rehabilitation Medicine, Fukui Medical University, Shimoaizuki 23, Matsuoka-cho, 910-1193, Fukui, Japan.


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