Multibody Computer Model of the Entire Equine Forelimb Simulates Forces Causing Catastrophic Fractures of the Carpus during a Traditional Race.
Authors: Pagliara Eleonora, Pasinato Alvise, Valazza Alberto, Riccio Barbara, Cantatore Federica, Terzini Mara, Putame Giovanni, Parrilli Annapaola, Sartori Maria, Fini Milena, Zanetti Elisabetta M, Bertuglia Andrea
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Researchers used computational modelling to investigate a catastrophic radial carpal fracture sustained by a racehorse during a Palio race, incorporating circuit design, speed and surface characteristics into a multibody dynamics simulation informed by actual racing conditions. Detailed examination of the damaged joint—including micro-CT and histological analysis—revealed diffuse cartilage wear, erosions and subchondral bone exposure across the distal radius and proximal carpal bones, with the computer model successfully predicting the precise contact points where fracture occurred. The modelling demonstrated a direct correlation between the elevated impact forces generated during cornering and the progressive cartilage breakdown observed in the joint, suggesting that cumulative microtrauma from high-speed turning rather than pre-existing pathology may precipitate catastrophic failure. Whilst this analysis derives from a single case and requires further validation, it demonstrates how computational methods can quantify internal joint forces during specific athletic demands that cannot ethically be reproduced experimentally, offering farriers, veterinarians and trainers a valuable framework for understanding how racing surface, turn geometry and speed interact to compromise carpal integrity. These findings may inform both injury prevention strategies and rehabilitation protocols, particularly in high-speed disciplines where tight-turn racing increases carpal loading beyond normal locomotion.
Read the full abstract on PubMed
Practical Takeaways
- •High-speed turning in racing (particularly Palio races) generates extreme carpal joint forces; veterinarians should counsel on risk management and consider radiographic screening before high-risk events.
- •Carpal joint cartilage damage may occur without prior clinical signs when impact forces exceed tissue tolerance; this supports the need for preventive conditioning and surface assessment.
- •Computational modelling offers a non-invasive research tool to understand catastrophic fracture mechanisms without animal welfare compromise, potentially informing safer racing practices.
Key Findings
- •Multibody computational modelling successfully predicted contact force points at the radio-carpal joint corresponding to the location of catastrophic fracture in a racing horse.
- •Elevated impact forces generated during turning at speed correlated with diffuse cartilage wear, erosion, and subchondral bone exposure on articular surfaces of the distal radius and proximal carpal bones.
- •Computer modelling can inversely calculate internal joint forces during specific racing conditions that cannot be ethically reproduced in vivo.
- •No pre-existing pathology was evident, suggesting acute mechanical overload from racing conditions as the primary fracture cause.