In vivo measurement of bone strain in the horse.

The research involves measuring bone strain in horses during different activities using strain gauges attached to specific areas of their limbs. These measurements helped forecast the tension band side of each examined bone.

Methodology

• In this study, scientists attached strain gauges (devices used to measure strain on an object) directly to the bones of horses.
• These strain gauges were bonded to the cranial, caudal, medial, and lateral parts of the equine radium and tibia. They were also attached to the dorsal, palmar, plantar, medial, and lateral parts of the metacarpus and metatarsus of the horse.
• All strain gauges were placed in the mid-diaphyseal region – the central part of the shaft of a long bone.

Procedures and Activities Assessed

• Different activities were examined including the horse walking, trotting, pacing, and standing up from anesthesia.
• The overall method was built to evaluate how the bones are affected by strain during various physical activities.

Strain Patterns and Results

• The research found that each stride produced its own unique deformation cycle, representing a pattern of bone strain.
• By measuring these strains, the researchers computed the axial loads – forces applied to a body in such a way that they pass through its center of gravity – while the horse was performing various activities.

Predictions from the Research

• The results of the measurements were used to predict the tension band side of each horse bone. The tension band refers to the area of the bone that undergoes tension and serves to hold the bone together, somewhat like a stretched elastic band.
• For the metacarpus and metatarsus, the tension band sides were the dorsomedial and dorsolateral aspects. However, for the radius and tibia, the tension band sides were the cranial and craniolateral aspects.

In conclusion, the study was successful in measuring and analyzing bone strain during various activities in horses. This could potentially contribute to better veterinary practices, including diagnosis and treatment of bone-related ailments.