Revision Total Ankle Arthroplasty Outcomes using the INBONE II System

Category: Ankle; Ankle Arthritis Introduction/Purpose: While the utilization of total ankle arthroplasty (TAA) for managing severe ankle osteoarthritis has become increasingly common, there has been a subsequent increase in the occurrence of revision TAA procedures due to implant failure. The INBONE II system has risen in popularity specifically for the use in revision TAA cases, however there has been limited patient performance data for this specific indication. Given the growing number of TAA revision procedures and increasing focus on motion-preserving salvage options, this study aims to comprehensively examine the clinical outcomes associated with revision TAA using the INBONE II system. Methods: A retrospective analysis was conducted on a group of 60 patients who underwent revision TAA with the INBONE II system. Detailed information was collected on patient demographics, implant characteristics, concurrent procedures, and complications. The implant survival was estimated using Kaplan-Meier analysis. Results: The study revealed high complication rates but generally fair clinical outcomes for revision TAA utilizing the INBONE II system. Complications were observed in 22 patients (36.7%), including persistent pain (n=6), nerve injury/impingement (n=5), infection (n=3), fracture (n=3), implant failure (n=3), impaired wound healing (n=2), and osteolysis (n=3). The three-year implant survivorship rate from reoperation was 92.0% [82.7%-100.0%] while the three-year survivorship rate from major complications was 90.4% [80.8%-100.0%]. Conclusion: Our study demonstrates that revision TAA is an option to preserve joint function following primary TAA failure. Although there are high complication rates associated with revision TAA, patients generally fair clinical outcomes for revision TAA using the INBONE II system. Further study with longer-term follow-up is needed to ensure that revision TAA is durable at longer time intervals and remains a favorable option for the salvage of the failed total ankle.