Incidence of palmar process fractures of the distal phalanx and association with front hoof conformation in foals.

This research article explores the prevalence of palmar process (PP) fractures in the distal phalanx of foals, with special attention to correlations with breed and hoof conformation. The study also investigates the relationship between distal limb conformation and fracture incidence.

Research Methodology

The research study was longitudinal and closely examined the front hooves of 19 foals representing three distinct breeds: Thoroughbred, Quarter Horse, and Arabian. The data collection method consisted of:

• Taking digital radiographic and photographic images of the distal forelimb aspects at approximately 2.5-month intervals.
• Performing a set of five distinct radiographic projections for each limb including lateromedial, horizontal beam dorsopalmar, and three different types of oblique angles.

The relationships between these measurements and fracture prevalence were then assessed using a 3-way ANOVA statistical analysis.

Results of the Study

The results revealed that 74% (14 out of 19) of the foals experienced fractures within the time frame of the study. The occurrence rates for lateral and medial PP fractures were almost identical. The study demonstrated:

• Certain hoof measurements held distinct correlations with PP fractures.
• Longer dorsal lengths of the distal phalanx were associated with medial PP fractures.
• Smaller lateral angles and shorter lateral palmar lengths were linked to an increased occurrence of lateral PP fractures.

Conclusions

The study concludes that there is a high incidence of PP fractures in young foals, particularly in Thoroughbred breeds. Notably, the study posits that hoof conformation might play a contributing role in the prevalence of such fractures. Further studies may be necessary to elaborate on these findings and create preventative measures based off the correlations found.