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Categories: Abstracts, 2016, Podium

Management of a failed total ankle replacement with a revision prosthesis. A multi center study of the indications, surgical challenges and short term outcomes of the Salto XT prosthesis

S. Li, M. Myerson, J.C. Coetzee

¹Beijing Tongren Hospital Capital Medical University, Foot and Ankle Center Orthopedic Department, Beijing, China

²Mercy Medical Center, Baltimore, United States

³Twin Cities Orthopedic Specialists, Minneapolis, United States

Background: Revision total ankle arthroplasty (TAA) can be extremely challenging due to bone loss and deformity. We present the results examining the preliminary indications and short term outcomes for the use of the Salto XT revision prosthesis.

Material and methods: We conducted an IRB approved prospective review revision TAA performed in two institutions using the Salto XT. There were 40 patients (24 females and 16 males with an average age of 65 years (45-83), who had undergone previous TAA (Agility 27, Salto 4, STAR 4, Buechal Pappas 1), and 4 patients who underwent staged procedures for infection. The primary indications for the revision were loosening and subsidence (34), malalignment (17), cyst formation (8), infection (4).

Results: Severe bone loss of the talus (30) and distal tibia (5) caused by erosion or cysts (8) were treated with cancellous bone graft (33), cement (7), or a combination (12). A press fit of the tibial component was obtained in 25 cases, and of the talus in 17. The talar component was seated directly onto the calcaneus in 4 cases supplemented anteriorly by cancellous bone graft. Patients were followed up for an average of 24.2 months (range 12-36 months). The overall complication rate was 25%. An 85% survivorship of the revision TAA was achieved (4 cases of postoperative infection and 2 cases of implant loosening). At the last follow-up visit, the remaining 34 implants were stable and none had loosened nor failed.

Conclusion: Revision ankle replacement with bone loss is a technically challenging procedure with acceptable outcomes for the patient but an 85% survivorship even in the short term. We noted the complexity yet feasibility of performing revision TAA, and determined that the stability of the prosthesis was important. The short term survivorship indicates a likely higher rate of failure in the longer term.

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Tags: Salvage TAR

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