Abstract
Three hundred seven triple arthrodeses were done on 282 patients with rheumatic diseases between 1995 and 1999. Solid and painless fusion was achieved in 261 patients (93%, 286 arthrodeses). Twenty-one arthrodeses (in 21 patients) that failed were analyzed. Fourteen (66%) malunions, six (29%) nonunions, and one (5%) painful foot without malunion or nonunion were found. Of the failed procedures, valgus alignment was present in 13 feet and varus alignment was present in eight feet. The most common cause of failure was a misjudgment in the surgical technique, which occurred in 12 of 21 (57%) patients based on inadequate correction and repositioning of hindfoot deformity. In four (19%) patients, additional ankle destruction and instability was overlooked as a cause of malalignment. Revision triple arthrodesis was successful in 18 of 21 (86%) patients. Triple fusion offers challenges in surgical technique, postoperative treatment, and rehabilitation. Understanding the complexity of the rheumatic hindfoot is important when performing triple arthrodesis in patients with severe deformities manifesting typically as calcaneovalgus and pes planus.
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