Objective- This paper reports the outcome of arthroscopic surgery in a subset of horses with fragments in different joints due to OCD or trauma and compares these results with other literatures. Design- Clinical study Animals- Horses with affected joints by OCD or traumatic fragments were treated by arthroscopic surgery during 2012-2014. Obtained data were involved breed, age, gender and activities of horses and also affected joints and location of lesions. Follow up of these cases ranged from 3 months to 2 years and was acquired from their owner and asbdavani.ir. Results- Most affected horses were male included Arabian, mixed and thoroughbred racehorses. The distribution of age ranged from 1 to 4 years old. The carp and stifle were the most frequent joints affected by chip fracture and OCD respectively. Long term follow up were shown the most horses in this study were returned to their athletic performance. Conclusion and Clinical Relevance- An arthroscopic procedure is the best surgery for treatment of OCD lesions, osteochondral fragments and chip fractures.

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