ArticleJournal of experimental orthopaedics2025
Medial joint line obliquity and medial meniscus tear were associated with medial meniscal extrusion: A case-control study.
Article in Journal of experimental orthopaedics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Meniscal extrusion: Multiple theories, one clinical challenge.Journal of experimental orthopaedics · 2026Article
- Medial joint line obliquity and medial meniscus tear were associated with medial meniscal extrusion: A case-control study.Journal of experimental orthopaedics · 2025Article
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Authors and funding
14 authors.
Funding
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Abstract
Purpose: Medial meniscal extrusion is a key factor in accelerating knee osteoarthritis. Medial joint line obliquity causes increased contact pressure on the medial meniscus, which potentially induces medial meniscal extrusion. Our hypothesis was that medial joint line obliquity contributes to an increase in medial meniscal extrusion in both supine and upright position during early-stage knee osteoarthritis (KOA). Methods: We analysed 124 knees with early-stage KOA. Medial joint line obliquity (knee joint line obliquity ≤ - 3°) and posterior tibial slope ( ≥ 6°) were assessed using standing full-length lower extremity radiography and magnetic resonance imaging, respectively. Medial meniscal extrusion was measured using ultrasonography in the supine and upright positions. Cases with excessive posterior tibial slope were excluded to minimise the influence of the posterior tibial slope, and the remaining 89 knees were divided into medial joint line obliquity ( Results: The medial joint line obliquity group showed significantly higher medial meniscal extrusion than the control group (supine, 3.0 ± 1.0 vs. 2.4 ± 0.9 mm, Conclusion: Medial joint line obliquity and medial meniscus tear may be risk factors for medial meniscal extrusion in both the supine and upright positions in early-stage KOA. Level of Evidence: Level IV.
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