Quantitative comparison of three commonly used treatments for navicular syndrome in horses.
Authors: Schoonover, Jann, Blaik
Journal: American journal of veterinary research
Summary
# Editorial Summary: Treatment Efficacy in Navicular Syndrome Navicular syndrome remains one of the most challenging chronic conditions in equine practice, yet evidence comparing standard interventions remains limited. Schoonover and colleagues employed force plate analysis to objectively evaluate four treatment protocols in 12 horses with confirmed navicular syndrome: heel-elevation shoeing alone, shoeing combined with phenylbutazone, shoeing with intra-articular triamcinolone acetonide (TA) injection to the distal interphalangeal joint, and all three modalities together. Heel elevation alone produced significant improvements in weight-bearing within 14 days, and the addition of phenylbutazone further increased loading on the affected limb—suggesting meaningful analgesic benefit—whilst TA injection showed measurable but non-significant improvement over shoeing alone. For practitioners, these findings indicate that mechanical correction through appropriate shoeing provides the foundation of treatment, with systemic anti-inflammatory medication offering quantifiable gains in limb use, though intra-articular corticosteroid injection may contribute incremental benefit rather than transformative change. The objectivity of force plate measurement strengthens confidence in these comparisons, though the modest sample size warrants cautious interpretation when applying results to individual cases with variable anatomy and disease severity.
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Practical Takeaways
- •Heel-elevation shoeing alone provides significant and measurable improvement in lameness in navicular syndrome cases within 2 weeks
- •Adding phenylbutazone to heel-elevation shoeing provides additional quantifiable lameness reduction beyond shoeing alone
- •DIPJ injection with triamcinolone did not demonstrate statistically significant additional benefit over shoeing alone, despite numerical trends favoring combination therapy
Key Findings
- •Heel-elevation shoeing alone significantly increased mean %BWF in both forelimbs 14 days post-shoeing compared to baseline
- •Phenylbutazone administration combined with heel-elevation shoeing significantly increased %BWF in the more lame forelimb compared to shoeing alone
- •DIPJ injection with triamcinolone acetonide showed no significant change in %BWF compared to shoeing alone, though numerically favored combination therapy
- •Heel-elevation shoeing with or without phenylbutazone quantitatively decreased lameness in horses with navicular syndrome