Outcomes of total talus replacement using a 3D-printed reinforced pure titanium prosthesis

초록

Background: Total talus replacement (TTR) using a customized implant is an effective joint-salvaging option for severe talar destruction. Although favorable results have been reported with ceramic, cobalt-chrome, and titanium alloy prostheses, outcomes of pure titanium implants have not been described. Purpose: To evaluate clinical outcomes of TTR using a pure titanium prosthesis. Study design: Retrospective cohort study. Methods: Thirty-nine patients underwent TTR for primary or post-traumatic avascular necrosis (AVN) of the talus with a mean follow-up of 23.2 ± 10.2 months (range, 12–55). Each prosthesis was fabricated from commercially pure titanium (Cp-Ti). Patient-reported outcomes, satisfaction, range of motion (ROM), and complications were assessed. Results: Pain VAS improved from 8.2 ± 1.0 preoperatively to 2.1 ± 2.4 at final follow-up (p < 0.001). FAOS, FFI, EQ-5D, and EQ-VAS showed significant improvement. ROM increased from 52.2 ± 31.3° to 95.9 ± 23.3° (p < 0.001). Asymptomatic tibial osteophytes developed in 5 cases (12.8 %), and subchondral cysts in 3 (7.7 %), including two with mild implant settling. Thirty-six patients (92.3 %) were very satisfied and three (7.7 %) satisfied; all would undergo the same procedure again. The post-traumatic group had stiffer ankles and more concomitant procedures but achieved comparable improvement. Conclusion: Short-term outcomes of TTR using pure titanium prostheses were favorable, showing significant pain relief, functional recovery, and high satisfaction. Pure titanium TTR is a feasible and effective treatment for primary or post-traumatic talar AVN. © 2025 by the American College of Foot and Ankle Surgeons. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

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