The centrodistal joint interosseous ligament region in the tarsus of the horse: Normal appearance, abnormalities and possible association with other tarsal lesions, including osteoarthritis.

This research investigates the radiological appearance and potential abnormalities of the centrodistal joint interosseous ligament region in horses, its potential relationship with osteoarthritis, and how it associates with pain in the distal tarsal joint. The study analyzed the joint areas in 700 horses and found that heavier bodyweight seemed to lower the likelihood of abnormalities, and that these abnormalities were more common in animals with osteoarthritis, however, were not necessarily related to joint pain.

Overview and Objective of the Research

• The main purpose of this research was to provide a detailed description of the centrodistal joint interosseous ligament region in horses, specifically how it appears under a radiological study.
• The study sought to understand the prevalence of mineralisation or ossification of the interosseous ligament, an area that had not been thoroughly documented before.
• The researchers wanted to identify any potential associations between abnormalities of this joint region and the occurrence of osteoarthritis.

Research Methodology

• The study was conducted retrospectively, analyzing a total of 700 horses and ponies that had undergone radiographic exams over a period of 7 years.
• The case history, height, bodyweight, and cause(s) of lameness were recorded for each animal.
• The researchers used logistic regression analysis to assess the factors associated with abnormalities in the centrodistal joint interosseous ligament region.

Results of the Study

• The researchers observed abnormalities in the interosseous ligament region of the lame limb in 121 out of the 700 animals studied, representing about 17.3% of the total.
• It was found that higher bodyweight was related to decreased odds of having abnormalities in this area.
• Out of the total animals studied, 6.7% showed radiological signs of osteoarthritis in the centrodistal joint.
• A larger proportion (36.4%) of animals displaying abnormalities in the interosseous ligament region also showed signs of osteoarthritis compared to those with normal ligament regions (0.5%), indicating a significant connection between these two conditions.

Conclusions

• The research concluded a significant association between the presence of abnormalities in the centrodistal joint interosseous ligament region and osteoarthritis.
• However, these abnormalities, whether they occurred individually or in conjunction with osteoarthritis, were not necessarily linked with distal tarsal joint pain, and could present asymptomatically.