In vitro measurement of internal hoof strain.

The research revolves around the development of an instrument capable of measuring internal hoof strain in horses, to improve the understanding of the hoof’s mechanical function. It also preliminarily compares the differences in internal strain between normal hooves and those affected by laminitis.

Instrument Development and Methodology

• The study aimed to create an instrumentation system capable of accurately measuring internal hoof strain – the stress and deformation on horse hooves during movement.
• Six forelimbs from four horses, including two with laminitis, were tested on an Instron test rig designed to simulate walking at impact, midstance, and breakover.
• Strain gauges were used to measure the internal strains. These gauges were moulded into a plug made of fast-set structural adhesive and positioned at a dorsal site.
• The study also collected kinetic and kinematic data from each specimen to provide a more comprehensive understanding of the forces and movements involved.

Results and Findings

• When the walk was simulated, a notable increase in the gradient of radial tensile strain was found in a normal hoof wall, indicating a normal strain progression through the motion.
• However, the radial strains measured at the inner gauge site in limbs with laminitis were found to be meaningfully compressive. This suggests that the strain distribution in a laminitic hoof differs greatly from that of a healthy hoof.
• The data implies that a significant redistribution of strain might occur in laminitic hooves due to the structural changes brought about by the disease.

Conclusion and Future Work

• The results of this study are preliminary in nature; further research with a larger sample size is needed to validate the findings.
• The information yielded by the developed instrument could be vital for understanding the mechanical function of the hoof and how laminitis alters it.
• If these findings are found to hold true upon further study, they could have substantial implications for the treatment and management of laminitis, potentially leading to more effective strategies in care and prevention of the disease.