Ankle arthrodesis using computer assisted external fixator in patients with end-stage ankle arthrosis

Abstract

Objective. Ankle arthrosis is an end stage disease for the ankle that happens because of posttraumatic arthropathies or inflammatory diseases. Ankle arthrodesis is the gold standard for ankle arthritis. We present the functional outcome for a mid-term follow up study of the patients who underwent trans fibular ankle arthrodesis fixated with hexapod type external fixator through a distal fibular grafting technique. Materials and Methods. A number of 18 patients with trans fibular ankle arthrodesis were included in this study, out of which 6 were female and 12 were male. The mean age at surgery was 57.6 (ranging from 45 to 73). All the patients underwent follow up for a mean follow up period of 27.5 months (ranging from 24 to 35 months). One of the patients had undergone ankle-related surgery for 9 times. The others had undergone 4 or more ankle-related surgeries. Results. Ankle fusions resulted in bony union within postoperative 4.1 months (ranging from 3 to 6 months). None of our patients had superficial or deep infection, soft tissue problems or problems about the external fixator. The mean preoperative AOFAS score was 52.4, and the postoperative AOFAS score was 78.2. We had 7 excellent (38.8%), and 11 (61.1%) good results. We had two cm shortening in 2 patients, 1.5 cm shortening in 1 patient and 1 cm in 5 patients. Conclusions. We have found this method to be useful to be applied to patients, especially to those who undergo lots of surgeries and for whom amputation is a last option.

Keywords

• ankle
• arthrosis arthrodesis
• trans fibular
• hexapod external fixator