Abstract
The purpose of the present retrospective study was to report the correction of severe, rigid equinus deformities using an Ilizarov external fixator alone, without adjunctive open procedures. Ten feet in 10 patients with rigid equinus deformities were enrolled and underwent gradual correction using an Ilizarov external fixator alone, without additional open procedures. The range of ankle joint motion was measured preoperatively and at the last follow-up visit. The radiographic outcome was assessed using the lateral tibiotalar angle on ankle radiographs taken preoperatively, immediately after removal of the Ilizarov fixator, and at the last follow-up visit. The mean duration of external fixator treatment was 40.1 ± 13.5 days. The preoperative mean ankle range of motion was −55.5° ± 22.2° of dorsiflexion and 63.0° ± 20.8° of plantarflexion. At the last follow-up visit, the mean dorsiflexion had increased to −2.5° ± 6.8° and the mean plantarflexion had decreased to 30.5° ± 12.6°. The mean lateral tibiotalar angle was 152.9° ± 19.7° preoperatively, 103.9° ± 9.4° immediately after removal of the Ilizarov external fixator, and 113.9° ± 11.6° at the last follow-up visit. Immediately after fixator removal, all the patients had clinical correction of their deformity to a plantigrade foot using the Ilizarov external fixator alone, with a mean correction of 49.0° ± 17.4°. Some recurrence was noted at the last follow-up examination, with a final mean correction of 39.0° ± 18.0°. The present study has demonstrated successful correction of severe, rigid equinus deformity with the use of an Ilizarov external fixator without the need for adjunctive soft tissue procedures. This method can be effective for patients with a high risk of complications after open procedures owing to their poor soft tissue envelope.
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