A Comparison of Wound Related Complications Between Intramedullary and Lateral Plate Osteosynthesis After Fibula Osteotomy in the Lateral Approach Total Ankle Replacement.

Abstract

Background: Total ankle replacement (TAR) has evolved in the last decade from a procedure rife with complication and failure to a promising alternative to arthrodesis. The ability to maintain ankle joint range of motion is showing great promise in patient-reported outcomes, postsurgical pain, as well as long-term sequalae of joint fusion. Although TAR can be performed via either an anterior or lateral approach both with their own sets of benefits and potential complications, the consensus seems to be that one is no better than the other when performed by high-volume surgeons.

Methods: Data were gathered over a 6-year period looking at an age- and gender-matched cohort of lateral approach TARs with either plate osteosynthesis or fibula nail fixation in the management of the fibula osteotomy and compared reoperation and infection rates with the working hypothesis that nail fixation would afford better outcomes. Secondary outcomes including rates of fibula union, tourniquet time as an adjunct to procedure length, and patient-reported outcome measures (PROMs) in the form of FAOS Quality scores were included.

Results: A total of 234 TARs were analyzed. Forty-five of these used intramedullary nail fixation (IM), and a control group of 45 plate osteosynthesis (PO) fixation cases was correlated. The Foot & Ankle International guidelines on reporting for complications arising from total ankle arthroplasty that resulted in reoperation were applied to the data set, and it was noted that 13 of 19 reoperations were noted in the PO group, which was statistically significant. Also of note, 12 of 16 patients treated with antibiotics, which included all those cases within the reoperation group, were noted to come from the PO group. This was also of statistical significance. Interestingly, the rate of fibula nonunion in the PO group was lower (8.88%) than that of the IM group (23.25%).

Conclusion: Our results confirmed that the rates of reoperation and infection were statistically significantly improved with the use of nail fixation over plate fixation. This was tempered by a concerningly high nonunion rate. This article shows promising results for the use of a simple technique in improving long-term outcomes in ankle arthroplasty.