Racing and sales performance after unilateral or bilateral single transphyseal screw insertion for varus angular limb deformities of the carpus in 53 thoroughbreds.
Authors: Baker William True, Slone Donnie E, Lynch Timothy M, Johnson Christopher R, Baker William A
Journal: Veterinary surgery : VS
Summary
# Editorial Summary Varus angular limb deformities of the carpus—where the lower limb deviates inward—present a common management challenge in young Thoroughbreds, with surgical correction via transphyseal screw (STS) insertion being a well-established technique. Baker and colleagues reviewed 53 yearlings treated between 2005 and 2006 with unilateral or bilateral STS placement in the distal radius, then tracked their subsequent performance through racing and sales data, comparing outcomes against their maternal siblings as an internal control. Crucially, no significant differences emerged between treated horses and their untreated siblings across any measured parameter: yearling sale prices were equivalent, as were 2-year-old in-training valuations, racing starts, career wins, total earnings, and earnings per start during the critical 2- and 3-year-old racing years. These findings provide reassuring evidence that transphyseal screw correction of carpal varus deformities does not compromise future athletic or commercial potential—a particularly important message for owners and breeders considering early intervention in valuable yearlings. The use of STS insertion therefore appears both effective and compatible with normal performance trajectories, supporting its selection as a treatment option where carpal alignment is a concern.
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Practical Takeaways
- •Transphyseal screw insertion for carpal varus deformities in Thoroughbreds does not negatively impact subsequent athletic or commercial performance
- •Treated yearlings achieved comparable racing outcomes and sale prices to their untreated siblings, supporting this technique as a viable corrective intervention
- •This procedure can be recommended with confidence regarding long-term performance consequences in racing Thoroughbreds
Key Findings
- •No significant differences in yearling sale price between treated horses and maternal siblings
- •Treated horses showed no difference in racing performance metrics (percent starters, percent winners, starts, earnings, earnings/start) compared to siblings at 2 and 3 years old
- •No deleterious effects on sales or racing performance identified after single transphyseal screw insertion for carpal varus deformities