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Intermediate-term Patient-Reported Outcomes and Radiographic Evaluation Following Intramedullary- vs Extramedullary-Referenced Total Ankle Replacement

Authors
Akoh, CC | Kadakia, R | Fletcher, A | Park, YU  | Kim, H | Nunley, JA | Easley, ME
Citation
Foot & ankle international, 42(5). : 633-645, 2021
Journal Title
Foot & ankle international
ISSN
1071-10071944-7876
Abstract
Background: The purpose of this study was to report on the radiographic outcomes, clinical outcomes, and implant survivorship following extramedullary-referenced (EMr) vs intramedullary-referenced (IMr) total ankle replacement (TAR). Methods: From May 2007 to February 2018, a consecutive series of patients with end-stage tibiotalar osteoarthritis undergoing TAR was enrolled in this study. Analyses were performed comparing IMr vs EMr components for patient-reported outcomes data, pre- and postoperative radiographic ankle alignment, concomitant procedures, and complications. Kaplan-Meier survivorship analyses served to determine implant reoperation and revision surgery. A total of 340 TARs were included with 105 IMr TAR and 235 EMr TAR. The mean follow-up was 5.3 years (±2.5, range 2-12). Results: The absolute value for preoperative coronal alignment was significantly greater for IMr compared to EMr TAR (13.0 vs 6.4 degrees; P <.0001), but both groups achieved near neutral alignment postoperatively (1.4 vs 1.5 degrees; P =.6655). The odds of having a concomitant procedure was 2.7 times higher in patients with an IMr TAR (OR 2.7, CI 1.7-4.4; P <.0001). There were similar improvements in patient-reported outcome scores at 1 year and final follow-up (all P >.05). The 5-year implant survivorship was 98.6% for IMr vs 97.5% for EMr at final follow-up. Conclusion: The IMr and EMr TAR components had comparable postoperative alignment, patient-reported outcome scores, and complications. The 5-year implant survivorship was similar between the IMr and EMr groups. Level of Evidence: Level III, retrospective comparative study.
Keywords

MeSH

DOI
10.1177/1071100720980024
PMID
33501837
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Orthopedic Surgery
Ajou Authors
박, 영욱
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