Intralesional bone marrow and superior check desmotomy is superior to conservative treatment of equine superficial digital flexor tendonitis.
Authors: Murphy David John, Kö-Peternelj Victoria, Aleri Joshua Wafula
Journal: Equine veterinary journal
Summary
# Superficial Digital Flexor Tendonitis: Does Surgery Outperform Conservative Management? Superficial digital flexor tendon (SDFT) injuries represent a persistent challenge in racing, causing substantial loss of training time and premature career termination. This retrospective case-controlled study compared 39 racehorses treated with intralesional bone marrow injection combined with superior check desmotomy against 38 conservatively managed horses and 37 uninjured matched controls, examining both return-to-racing rates and subsequent performance metrics. Surgically treated horses demonstrated significantly higher odds of returning to racing (OR 4.7, P = 0.006) and achieved this return substantially faster than conservative cases (P = 0.04), though interestingly, once both groups resumed racing, there were no statistically significant differences in wins, placings, earnings or total lifetime starts post-injury. Standardbred racehorses showed better return-to-racing outcomes than Thoroughbreds regardless of treatment approach (OR 4.0, P = 0.03), suggesting breed-specific factors may influence prognosis. Whilst the retrospective, non-randomised design limits definitive conclusions, these findings suggest surgical intervention accelerates rehabilitation and improves the likelihood of athletic comeback, though long-term competitive performance appears comparable between treatment modalities—an important distinction for decision-making when counselling owners on SDFT tendonitis management.
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Practical Takeaways
- •Racehorses with SDFT tendonitis undergoing surgical intervention (bone marrow and desmotomy) have substantially better return-to-racing rates than conservative management, which should inform treatment recommendations
- •Despite higher return-to-racing rates with surgery, long-term performance metrics are comparable between groups, suggesting surgical horses may race sooner but achieve similar career outcomes
- •Breed considerations matter: Standardbreds have significantly better racing prognosis following SDFT injury than Thoroughbreds, regardless of treatment approach
Key Findings
- •Surgically treated horses (intralesional bone marrow and superior check desmotomy) were 4.7 times more likely to return to racing than conservatively managed horses (P = 0.006)
- •Standardbreds were 4.0 times more likely to return to racing compared with Thoroughbreds (P = 0.03)
- •Surgically treated horses had significantly shorter time to return to racing than conservative group (P = 0.04)
- •No significant difference between surgical and conservative groups in average wins, placings, post-injury earnings, or lifetime starts post-injury (P > 0.05)