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Updated: Dec 20, 2025
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Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness
Published on: March 18, 2022
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Microstructural analysis of subchondral bone in knee osteoarthritis
L A Holzer1,2, M Kraiger3, E Talakic4
1Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria. lukas.holzer@auva.at.
Summary
Advanced knee osteoarthritis shows increased subchondral bone formation, particularly in weight-bearing areas. These bone changes are linked to mechanical factors like meniscus damage and knee alignment, suggesting a secondary role in osteoarthritis progression.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Radiology
Background:
- Subchondral bone alterations are implicated in the progression of knee osteoarthritis (OA).
- Understanding these changes in relation to cartilage, meniscus, and alignment is crucial for OA management.
Purpose of the Study:
- To analyze subchondral bone microstructure in late-stage knee OA specimens.
- To correlate subchondral bone changes with articular cartilage damage, meniscus integrity, and knee joint alignment.
Main Methods:
- High-resolution micro-computed tomography (micro-CT) scans of 30 proximal tibiae from late-stage OA patients.
- Semi-automated segmentation and analysis of bone volumes of interest.
- Semi-quantitative assessment of articular cartilage damage via MRI.
Main Results:
- Significantly higher bone fraction volume (BV/TV) in weight-bearing areas compared to non-weight-bearing regions.
- Increased BV/TV in the medial compartment versus the lateral compartment.
- Subluxated or luxated menisci correlated with higher BV/TV; varus/valgus alignment influenced medial/lateral BV/TV.
Conclusions:
- Subchondral bone microstructural parameters significantly differ based on cartilage damage, meniscus integrity, and knee alignment.
- Subchondral bone changes in late-stage knee OA appear secondary to mechanical alterations.
- These findings highlight the mechanical influence on bone remodeling in osteoarthritis.
