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Osteoarthritis (OA or arthritis) is the most common joint disease in horses and a survey suggested that 60% of lameness problems are related to OA. Joint pain and loss of mobility due to OA are common causes of poor performance and early retirement in equine athletes. Traumatic injury is considered a common cause of OA and may arise from a single event leading to a joint injury or it may be the result of repetitive, traumatic insults such as the stresses suffered during racing and training.
includes synovitis, capsulitis, articular cartilage damage, ligament damage and OA
Synovitis and capsulitis are the consequence of the trauma suffered by athletic horses during routine training and leads to swelling and pain. If left untreated, the inflammatory mediators released (proteinases, prostaglandins, cytokines and free radicals) in these conditions can contribute to degenerative joint disease, also known as OA. OA is a progressive disease of synovial joints, characterized by degeneration of articular cartilage and clinically associated with pain and lameness. OA is among the most common cause of lameness in horses and is a disease with far reaching economic and welfare implications.
The environmental effect of trauma on the equine joint initiates and progresses into the arthritis cycle where a negative feedback is experienced and without proper treatment continued degradation will occur.
The pathways of equine traumatic joint disease are on the most part the same as those in osteoarthritis and should traumatic joint disease not be properly treated it will progress along the spectrum to osteoarthritis. Once the arthritis cycle begins, due to its cyclic nature and continual degradation, joint failure will become more frequent leading to additional and more frequent lameness.
A multi-modal approach to these problems is required with a program that prevents and addresses the arthritic cycle and the underlying physical and chemical processes involved.