Early Outcomes with the CADENCE Total Ankle Prosthesis

CATEGORY: Ankle Arthritis; Ankle; Other INTRODUCTION/PURPOSE: A number of two-component, 4th generation total ankle arthroplasty (TAA) prostheses have been introduced to the market within the past few years. The purpose of the present study was to assess early outcomes for the CADENCE total ankle prosthesis. METHODS: All patients who underwent primary TAA with CADENCE between August 2016 and June 2018 at a single institution and who were at least 1 year postoperative were included. A total of 32 ankles with a mean follow up of 19 (range, 12-33) months met the criteria. Weightbearing radiographs were assessed using coronal and sagittal alignment parameters preoperatively, at 6 weeks postoperative, and at the most recent follow-up. Medical records and charts were reviewed and revisions, reoperations, and complications were classified according to the criteria established by Vander Griend et al. and Glazebrook at el., respectively. RESULTS: Survivorship for the CADENCE prosthesis was 93.7%. Coronal and sagittal tibiotalar alignment significantly improved after surgery (p< 0.001, p< 0.005), and was maintained at the latest follow-up (p=0.44, p=0.30). Overall, two ankles (6.3%) underwent early revision for aseptic loosening; while 6 (18.8%) underwent a non-revisional reoperation. Nine ankles (28.1%) presented a total of 13 complications (4 high grade, 2 intermediate, and 7 low) according to the Glazebrook classification system. The most common was intraoperative periprosthetic medial malleolar fracture (5 ankles, 15.6%), a low-grade complication. CONCLUSION: Satisfactory outcomes were observed at short-term follow-up for the CADENCE prosthesis. Additional studies with longer follow-up are warranted.