Salvage arthrodesis for charcot arthropathy

Complex ankle arthrodesis with step-cut osteotomy in Charcot arthropathy with bone loss

We report a case of a complex limb salvage ankle arthrodesis in a patient with Charcot arthropathy. A step-cut osteotomy was performed in order to tackle the issues of anterior tibial bone loss; worsening leg length discrepancy; soft tissue contraction; joint instability and high risk of non-union. The construct formed by the step-cut allowed for the preservation of good bone stock; avoidance of further limb shortening; increased torsional stability and increased surface area for bony union. This resulted in a patient with a stable, plantigrade foot appropriate for footwear. We use this case to highlight this technique as an option in the operative management of complex ankle fusions with sagittal or coronal plane deformity with bone loss and subluxation of the ankle joint.

Effectiveness of Hindfoot Arthrodesis by Stable Internal Fixation in Various Eichenholtz Stages of Neuropathic Ankle Arthropathy

The optimal time to treat neuropathic (Charcot) arthropathy of the ankle and peritalar joint is controversial because of the various treatment options available and the variable results reported in published studies. We sought to determine the outcome of hind foot arthrodesis with stable internal fixation in patients with different Eichenholtz stages of arthropathy. We prospectively studied patients with substantial disabilities caused by neuropathic arthropathy in deformed, unstable ankle and peritalar joints, with or without ulcerations, who had undergone treatment from July 2007 to December 2012. All patients underwent ankle arthrodesis, autologous iliac crest bone grafting, and subtalar joint arthrodesis, with or without talonavicular joint arthrodesis, fixed internally with an intramedullary hindfoot nail, with or without an additional plate or cancellous screws. Of the 33 enrolled patients, 9 (27.3%) had stage I, 13 (39.4%) had stage II, and 11 (33.3%) had stage III Charcot arthropathy. The cause of arthropathy was diabetes mellitus in 25 (75.8%) patients. The duration of symptoms ranged from 1 to 120 (median 7) months. The mean follow-up period was 40 (range 12 to 76) months and did not differ markedly among the groups. The hindfoot scores, rate of salvage or amputation, or complication rates did not differ significantly across Eichenholtz stage. For the patients with stage I, II, and III, the preoperative hindfoot score was 50, 49, and 48, respectively (p = .9). The corresponding postoperative scores were 68, 68, and 70 (p = .5). We found no evidence that the effectiveness of hindfoot arthrodesis by stable fixation varied across the Eichenholtz stage of Charcot arthropathy involving ankle and peritalar joint. Furthermore, we found that stable internal fixation and bone grafting using a hindfoot nail results in an 84.84% union rate and salvages the unstable and disabled foot in 90.9% of patients with ankle and peritalar Charcot arthropathy.

Early results with use of the midfoot fusion bolt in Charcot arthropathy

Charcot neuroarthropathy is a complicated condition affecting up to 1 in 680 diabetic patients that can rapidly cause severe destruction of the bony architecture in the foot, with resultant gross instability and frank deformity. Conservative care is not always successful at maintaining an intact soft tissue envelope of the foot; therefore, surgical reconstruction is often attempted in an effort to salvage the limb. The goal is to create a stable, plantigrade foot that can be placed in a shoe or simple brace. However, this effort is dramatically more challenging because of the pathologic bone biology, the inelasticity of the connective tissues, and the difficulty in maintaining non-weightbearing status during the postoperative period. Various forms of internal and external fixation have been described in published studies for use in this setting, all of which have been accompanied by complications such as nonunion, dehiscence, and implant failure. Although the concept of beaming the longitudinal columns of the foot is not new, it has previously been described with the use of cannulated screws. Cannulated screws are inherently weaker than solid-core screws and thus subject to failure at lesser loads. The midfoot fusion bolt offers a technical advantage compared with other forms of fixation in these challenging cases. We present our limited experience with 4 patients who had this device used as a part of the surgical approach and the short-term results. All patients went on to successful union of all fusion sites and were able to return to ambulation in diabetic shoe gear and appropriate bracing.