Long-term results of ankle arthrodesis using an intramedullary nail with fins in patients with rheumatoid arthritis hindfoot deformity.

We report herein the results of a retrospective study of 30 ankle arthrodesis procedures performed in 27 patients with rheumatoid arthritis from 1994 through 2001 using a novel design of intramedullary nail with fins. The surgical treatment, post-operative management and clinical evaluation are described. The clinical evaluation, at an average follow-up period of more than 10 years, was based on foot disease scores from the Japanese Orthopaedic Association and scores obtained preoperatively, postoperatively, and during follow-ups 1 (November 2001) and 2 (November 2007) were compared. These variables showed significant improvement between before surgery and at follow-up evaluations. Non-union was not observed and no marked changes of the Chopart joint were seen between before surgery and at follow-up evaluations. Delayed wound healing was seen in 9 of 30 joints. However, infection neuropathy or other complications were not found. We conclude that arthrodesis using an intramedullary nail with fins is an effective treatment for severe hindfoot deformities in patients with rheumatoid arthritis because no cases of non-union were observed and because clinical results over the mean 10-year follow-up period were good or satisfactory.