Lameness attributable to osteochondral fragmentation of the plantar aspect of the proximal phalanx in horses: 19 cases (1981-1985).

This research paper discusses a study where osteochondral fragmentation, a type of bone condition, was found as a cause of hind limb lameness in 19 horses. The study also compared the effectiveness of treatments including surgery and administration of polysulfated glycosaminoglycans or corticosteroids.

Osteochondral Fragmentation in Horses

• The research focuses on a specific kind of bone disease in horses called osteochondral fragmentation. This occurs when bone fragments break off from the main bone mass.
• In this study, this condition was noted on the plantar aspect of the proximal phalanx – the part of the hind limb of horses. The issue caused lameness or difficulty in movement for the horses, particularly during high performance activities.

Diagnosis and Isolation of The Condition

• The researchers were able to isolate this issue to the metatarsophalangeal joints of the horses. These joints were located and diagnosed using intra-articular or regional anesthesia. This means that they used anesthesia to numb specific areas or regions of the body to pinpoint the location of the problem.

Treatment Comparison: Surgery vs. Medication

• In order to address the problem, two modes of treatments were administered to the horses – surgery and intra-articular medication with polysulfated glycosaminoglycans or corticosteroids.
• Out of the 19 horses, 10 underwent surgery during which the fragments were removed. All of them were able to return to full use. On the other hand, seven horses received medical treatment. Out of these, only one was able to return to full use. This highlights the effectiveness of surgical treatment over medication for such conditions in horses.

Results and Conclusion from Research

• The results of this research indicated that surgical removal of the fragments seems to be the most effective treatment for osteochondral fragmentation of the plantar aspect of the proximal phalanx in horses.
• However, the research also considered that medical treatment combined with a decrease in the horse’s performance expectations could be useful. This implies that adjusting expectations of the horse’s activity level might be needed when resorting to medication as the main form of treatment.