An experimental study of autologous digital tendon transplants in the horse.

The study investigates four different methods of autologous tendon grafting in horses, specifically focusing on the remodeling and vascularization of the transplant. The results indicate that regardless of the technique, the grafts are eventually replaced by a highly organized and oriented tendon, suggesting that free grafts from tendons could potentially be utilized in the treatment of severe tendon injuries in racehorses.

Study Objectives

• The primary objective of the study was to examine four different types of autologous tendon grafting techniques in horses. These methods included free grafts of the deep digital flexor tendon and free grafts from the lateral digital extensor tendon as well as bipedicle and pedicle grafts.
• The researchers aimed to analyze the vascularization (the process by which blood vessels grow in or into a given tissue) and remodelling (the process in which the structure of a tissue or an organ changes) of the transplant.
• Another goal was to assess the reactions in both the donor and the recipient tendon.

Research Methodology

• The research study employed microangiographic and histochemical methods for analysis. Microangiography is a radiographic examination process of the smallest blood vessels in particular tissues, while histochemical methods involve the use of chemical reactions for identification and determination of cellular compounds.
• By using these methods, the researchers were able to observe the changes in the grafts from the point of transplantation to the stage of full integration and function within the recipient tendon.

Results and Conclusion

• The results of the investigation showed that despite the difference in technique, all the grafts were revascularized and replaced by a highly orientated and organized tendon.
• This conclusion implies that free grafts from tendons, even if from different locations, could potentially be a successful treatment for severe tendon injuries in valuable racehorses.
• However, further studies would be required to determine the long-term effects and potential complications of these grafting techniques.