Early experience with a 3-D printed porous surface, fixed-bearing, total ankle arthroplasty: A minimum of 2-year follow-up

Background: This is a pilot study reviewing patients undergoing ankle replacement with the 3-D printed INFINITY (TM) with ADAPTIS (TM) total ankle arthroplasty (TAA) system. Methods: A retrospective review was conducted of patients with a minimum two-year follow-up who underwent TAA with the INFINITY (TM) with ADAPTIS (TM) implant system. Outcome measures include implant survivorship, complications with subsequent reoperations, patient reported outcomes, and radiologic subsidence or radiolucency. Results: Thirty patients were included with median follow-up of 26 months (range, 24-36). Implant survival rate was 90% (27/30). Two patients experienced linear radiolucency > 2 mm: one required a revision TAA secondary to tibial subsidence; the other patient was asymptomatic and nonprogressive on serial radiographs. No cystic radiolucencies > 5 mm were identified. VAS, PROMIS PF, and FADI scores improved significantly. Conclusion: TAA performed with the 3-D printed INFINITY (TM) with ADAPTIS (TM) implant technology led to ninety percent short term implant survivorship and improvement in patient reported outcomes with comparable results to other 4th generation arthroplasty systems as a treatment modality for end-stage ankle arthritis. Level of evidence: Level III, Retrospective cohort study, Prognostic (c) 2024 European Foot and Ankle Society. Published by Elsevier Ltd. All rights reserved.