The 3D Printed Total Talus Replacement: A Novel Treatment Option for Avascular Necrosis of the Talus

Abstract

Category:Ankle; TraumaIntroduction/Purpose:Talus avascular necrosis (AVN) is a challenging entity to treat. Management options depend upon disease stage and severity. Total talus replacement (TTR) is a treatment option that maintains joint range of motion. The literature on TTR is limited with variability in implant design and material. The purpose of this study is to evaluate outcomes following total talus replacement with a custom 3D printed metal implant.Methods:Patients that underwent TTR were retrospectively reviewed over a three year period. Basic demographic data and comorbidities were collected. Medical records were reviewed to obtain postoperative and preoperative visual analog (VAS) scores, Foot and Ankle Outcomes Scores, (FAOS), ankle range of motion, and postoperative complications. Statistical analysis was conducted to compare clinical and patient-reported outcomes pre and postoperatively.Results:Twenty-eight patients underwent TTR for talar AVN with a mean follow-up of 16.4 months. Ankle range of motion remained unchanged statistically pre and postoperatively. VAS pain scores improved significantly pre and postoperative from 6.6 to3.9 (p < 0.001). FAOS scores significantly improved postoperatively with regards to pain (p = 0.002), symptoms (p=0.03), quality of life (p < 0.001), and activities of daily living (P < 0.001). There were three complications requiring reoperation in this cohort.Conclusion::3D printed total talus replacements represent a unique surgical option for patients with talar collapse secondary to AVN. Patients in this cohort demonstrated significant improvements in pain scores and patient-reported outcomes while maintaining preoperative joint range of motion. TTR allows for symptomatic improvement with the preservation of motion in individuals with talar collapse and end-stage AVN.