Arthrodesis of the Proximal Interphalangeal Joint in the Horse: A Surgical Treatment for High Ringbone

Abstract

SUMMARY Surgical arthrodesis of the proximal interphalangeal joint in 22 horses was reviewed. The review covered cases from October 1972 to March 1976. Most of the horses had little postsurgical pain; however, phenylbutazone administered at the rate of 3.5 mg/kg of body weight encouraged them to bear weight on the affected limb and minimized soft tissue swelling under the cast. The cast was left on an average of 23 days, at which time it was removed to allow for accurate radiographic evaluation. If the evaluation revealed additional time of external support was needed to minimize stress on the arthrodesis, the cast was again applied. Exercise was restricted for a month following final removal of the cast. During this time, a firm wrap was applied and minimal exercise was allowed. A cancellous bone graft was done in one horse with infectious arthritis. Generally, infection precludes the use of bone implants; yet, this horse was sound in 6 months. The review included the surgical approach as well as the final disposition of each horse. It was concluded that the surgical technique used was an effective procedure for returning an arthritic horse to functional soundness.