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Updated: Mar 20, 2026
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Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness
Published on: March 18, 2022
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Association between subchondral bone structure and osteoarthritis histopathological grade
Mikko A J Finnilä1,2,3, Jérôme Thevenot1,2, Olli-Matti Aho2,4
1Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland.
Summary
Subchondral bone changes significantly with osteoarthritis (OA) severity. Micro-CT analysis reveals bone structural adaptations, suggesting potential for radiological assessment of OA progression.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Radiology
Background:
- Osteoarthritis (OA) pathogenesis involves subchondral bone, but its structural changes relative to cartilage degeneration are poorly understood.
- Understanding these bone adaptations is crucial for developing effective OA treatments.
Purpose of the Study:
- To correlate subchondral bone structural adaptations with histological osteoarthritis (OA) severity.
- To explore the potential of micro-computed tomography (μCT) for assessing OA severity through bone structure analysis.
Main Methods:
- Analyzed 25 osteochondral patient samples using micro-computed tomography (μCT) and histology.
- Assessed conventional and novel 3D bone structural parameters in subchondral plate and trabecular bone.
- Correlated bone parameters and OARSI (Osteoarthritis Research Society International) grades.
Main Results:
- Subchondral plate thickness increased with OA severity, while specific bone surface decreased; tissue mineral density remained unchanged.
- Trabecular bone showed increased bone volume fraction, thickness, and number, with decreased separation and structure model index.
- Increased local pattern entropy and altered pattern orientations indicated greater tissue heterogeneity and structural reorganization with advancing OA.
Conclusions:
- Subchondral bone undergoes significant structural remodeling in response to osteoarthritis progression.
- Radiological assessment of subchondral bone structure shows promise for evaluating OA severity and guiding treatment strategies.
