Variations in cross-sectional area and composition of equine tendons with regard to their mechanical function.

This research article explores specific characteristics of equine tendons and their relationship with mechanical function. The results indicate that the cross-sectional area does not provide reliable information regarding the strength of the tendon.

Study Design and Objectives

• The main aim of the study was to investigate variations in physical and compositional properties of equine hindlimb tendons, namely the superficial and deep digital flexor tendons and the suspensory ligament.
• The specific parameters examined included the cross-sectional area, collagen content, dry weight percentage of the wet weight, and the tendon fibre percentage of the cross-sectional area.
• These parameters were assessed at different places within a single tendon, in different tendons in the same horse, and in similar tendons in different horses.

Key Findings

• The research found that the four parameters of tendons varied based on the specific location within a given tendon, as well as between different tendons within the same horse, and between the same tendon types in different horses.
• The data showed an inverse relationship between the cross-sectional area and the other parameters within a tendon – as the cross-sectional area increased, the collagen content, dry weight, and tendon fiber percentage decreased.
• Similarly, within and between horses, the cross-sectional area of a tendon was inversely proportional to the collagen content and the dry weight percentage.

Conclusions

• Based on these findings, the researchers concluded that the cross-sectional area of a tendon is not indicative of its strength. This suggests that more complex factors related to the composition of tendons influence their mechanical strength.