Effect of carbon-fiber-reinforced polyetheretherketone on stress distribution in a redesigned tumor-type knee prosthesis: a finite element analysis

Background: Surgery for bone tumors around the knee often involves extensive resection, making subsequent prosthetic reconstruction challenging. While carbon fiber-reinforced polyetheretherketone (CF-PEEK) has been widely used in orthopedic implants, its application tumor-type prosthesis is limited. This study aims to evaluate feasibility of using 30wt% and 60wt% (CF30-PEEK CF60-PEEK) as materials a redesigned through numerical analysis. Methods: A joint model based on CT data was created, resection were simulated. Three finite element models prostheses, representing initial updated designs with CoCrMo CFR-PEEK components, constructed. Loading conditions during standing squatting simulated forces 700 N 2800 N, respectively. Finite analysis analyze von Mises stress stability all components each type. Results: After improvements both material design, new Type 3 showed significantly lower overall being evenly distributed. Compared maximum reduced by 53.9% 74.2% squatting. In position, CF30-PEEK femoral component decreased 57.3% compared design which composed CoCrMo, while CF60-PEEK cardan shaft remained consistent. 81.9%, 46.5%. Conclusion: The incorporation effectively transmits reduces concentration component, maintaining stiffness. conducts loading force demonstrates favorable biomechanical characteristics, indicating promising potential utilizing prostheses. findings this could provide novel insights development