Navicular disease in the horse. A microangiographic investigation.
Authors: Svalastoga
Journal: Nordisk veterinaermedicin
Summary
# Editorial Summary: Navicular Disease as an Osteoarthritic Process Svalastoga's microangiographic study examined whether the vascular changes in navicular disease reflected a pathological process comparable to osteoarthritis, using contrast-enhanced radiography to visualise blood flow patterns in affected versus normal navicular bones. Despite preserved overall vascular architecture, diseased bones demonstrated characteristic dilated vessels with contrast pooling in the subchondral region beneath the flexor cortex—findings that mirror those observed in human osteoarthritic joints. These vascular alterations suggest increased blood flow and pressure within the subchondral bone, supporting the hypothesis that navicular disease develops through degenerative mechanisms similar to other arthroses rather than as a discrete, isolated condition. Understanding navicular disease through this osteoarthritic lens has significant implications for therapeutic approaches: rather than seeking curative interventions targeting a unique pathology, management should focus on load modification, vascular support, and slowing degenerative progression, much as we approach other joint arthroses. Whilst now over four decades old, this work remains foundational in contextualising navicular disease within broader joint pathology and justifying why conventional arthrosis-based treatments—from farriery adjustments to anti-inflammatory protocols—form the cornerstone of modern navicular management.
Read the full abstract on PubMed
Practical Takeaways
- •Navicular disease shares pathophysiological mechanisms with osteoarthritis, suggesting similar degenerative processes may underlie the condition
- •Vascular changes and contrast pooling indicate compromised subchondral blood flow, which may explain pain and progressive cartilage degeneration in affected horses
- •Understanding the arthritic nature of navicular disease may guide treatment strategies toward managing inflammation and supporting joint health rather than pursuing purely biomechanical interventions
Key Findings
- •Microangiographic patterns in navicular disease show preserved vascular architecture compared to normal navicular bones
- •Diseased navicular bones exhibit vessel dilation and contrast medium pooling in subchondral regions beneath the flexor cortex
- •Vascular changes in equine navicular disease mirror those observed in human arthrosis
- •Findings support classification of navicular disease as an osteoarthritic process