Radiographic Measurements of Hoof Balance Are Significantly Influenced by a Horse’s Stance.

The research article discusses how the stance of a horse significantly influences radiographic measurements of its hoof balance, often used in determining the need for corrective farriery. As such, the study suggests that the horse’s limb posture should be taken into account when interpreting these radiographs and making decisions related to hoof maintenance.

Study Design and Procedure

• The study was analytical, and it investigated the impact of two variables on hoof balance measurements: the craniocaudal and lateromodial stance of a horse, and the horizontal radiographic beam angle.
• Five healthy, sound horses were selected, and their left distal thoracic limb lateromedial radiographs were taken following a standardized protocol. This process was repeated while varying the craniocaudal stance of the horses.
• The team also acquired dorsopalmar foot radiographs while varying the horses’ lateromedial stance, along with variable angle horizontal beam dorsopalmar foot radiographs. The horses’ limb position was kept constant during this process.

Key Findings

• The team found that the hoof pastern angle and the craniocaudal stance of the horse had a linear relationship. In statistical terms, this was denoted by a strong correlation coefficient (R=0.89) proving that the two are closely related.
• The researchers observed differing relationships between joint angle and stance at varying locations. The distal interphalangeal joint angle showed a significant relationship (R=0.89) with the stance, while the proximal interphalangeal joint angle showed a less robust but still significant relationship (R=0.65).
• Other elements such as the proximal interphalangeal joint width, distal interphalangeal joint width, and the distal phalanx’s height remained constant regardless of the lateromedial stance position. This constancy held true even when varying within a 15-degree spectrum along the dorsolateral to caudomedial and dorsomedial to caudolateral axes from the dorsopalmar axis.
• However, the angle of the distal phalanx remained unaltered despite any variations in the craniocaudal stance.

Implications of the Study

• The results indicate that the stance of the horse’s thoracic limb plays a crucial role in the radiographic interpretation of hoof balance. Thus, these considerations need to be factored in during decision-making processes pertaining to corrective farriery.