Triple Arthrodesis Using Internal Fixation in Treatment of Adult Foot Disorders

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Abstract
Forty adult patients with 44 fused feet were evaluated at an average of 4.9 years after triple arthrodesis. The average age of the patients at operation was 41 years. All operations were performed by a specific technique using rigid internal fixation with screws. Outcome was graded using the clinical criteria of Hallgrimsson as modified by Angus and Cowell. Function was evaluated according to modified Arthritis Impact Measurement Scales (AIMS). Radiographic evaluation included measurement of lateral talocalcaneal angle, lateral talometatarsal angle, and anteroposterior (AP) talometatarsal angle on standing or simulated weight-bearing radiographs. Thirty-four feet had good results, six had fair results, and there were four failures. The average patient could function painlessly on flat surfaces in nonstrenuous activities and had only occasional mild pain with more vigorous activities. In roentgenographic parameters, there was an average improvement of 17° in the lateral talometatarsal angle, 11° improvement in the lateral talocalcaneal angle, and an improvement of 18° in the AP talometatarsal angle. There were two pseudarthroses, no recurrences, and two unsatisfactory corrections. When carefully done, triple arthrodesis can restore an adult patient with a disabling foot disorder to normal function and minimal pain.

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