Excision arthroplasty for hallux valgus in the elderly: a comparison between the Keller and modified Mayo operations.

A retrospective clinical and radiological review of 51 patients (mean age 66 years) was performed to assess the outcome of excision arthroplasty for hallux valgus in an elderly population and to compare the results of the Keller, which is still used frequently in many centers in the United Kingdom, and modified Mayo operations. Although significant correction of the deformity was obtained with both procedures, this was incomplete and the mean residual hallux valgus angle was greater than 20 degrees. Lateral metatarsalgia was present in over 40% of patients. Both procedures provided good pain relief, and considerable narrowing of the forefoot was obtained with the modified Mayo operation. Excision arthroplasty in the elderly should be reserved for the low demand patient with symptomatic degenerative changes in the first MP joint in the absence of lateral metatarsalgia.