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Author Spotlight: Enhancing Rheumatoid Arthritis Research Through HR-pQCT Imaging Analysis
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Association between radiographic hand osteoarthritis and bone microarchitecture in a population-based sample
Canchen Ma1, Dawn Aitken1, Feitong Wu1
1Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, TAS, 7000, Australia.
Arthritis Research & Therapy
|September 17, 2022
Summary
Hand osteoarthritis (HOA) involves increased bone size and trabecular disorganization, with decreased bone density, particularly at proximal sites. These bony changes are linked to osteophytes and joint space narrowing in HOA.
Area of Science:
- Rheumatology
- Orthopedics
- Bone Biology
Background:
- Subchondral bone is crucial in osteoarthritis (OA) pathogenesis.
- Bony changes in hand OA (HOA) are less understood.
- This study investigates HOA and high-resolution peripheral quantitative computed tomography (HRpQCT) in a population-based sample.
Purpose of the Study:
- To describe the association between radiographic HOA and HRpQCT measures.
- To characterize bony changes in the hand joints and distal radius in older adults.
Main Methods:
- 201 participants from the Tasmanian Older Adult Cohort (TASOAC) study were assessed.
- HRpQCT evaluated the 2nd distal and proximal interphalangeal (DIP, PIP) joints, 1st carpometacarpal (CMC) joint, and distal radius.
- Radiographic HOA was scored using the OARSI atlas.
Main Results:
- Proximal osteophyte and joint space narrowing (JSN) scores strongly correlated with HRpQCT measures.
- Bone size indices (total/trabecular area, cortical perimeter) positively associated with osteophytes/JSN.
- Volumetric bone mineral density (vBMD) negatively associated; trabecular number and bone volume fraction decreased with increasing osteophyte/JSN scores.
Conclusions:
- Bone size and trabecular disorganization increase with osteophytes and JSN in HOA.
- Local vBMD decreases at the site of pathology.
- These changes are localized to the affected joint rather than nearby bone.
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