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Abstract
The destruction of the subtalar joints in 103 seropositive RA patients with recent (6 months) disease was evaluated radiographically in a prospective follow-up study at onset and at 1, 3, 8, 15, and 20 years from entry. A total of 83 patients attended the 15-year follow-up and 68 the 20-year follow-up. The Larsen grades of the joints were evaluated and the need for surgical treatment considered. At the 15-year follow-up the mean Larsen grade was 1.2 (median 0) and at the 20-year follow-up 1.3 (median 0); at the 20-year follow-up 77 subtalar joints were still assessed as Larsen grade 0. In this series, subtalar fusions were performed in 12 patients only. Spontaneous fusions occurred in 5 hindfeet in 3 patients.
The destruction rate of the subtalar joint was lower than in previous retrospective or cross-sectional studies. The need for routine radiographs of ankles in RA patients is questioned.