comparative evaluation of carbon reinforced polyetherketone acetabular cup using finite element analysis

Background: patients suffering from osteoarthritis undergo surgery to replace hip joints with hip prosthesis implants. today most acetabular cups of hip prostheses are made of ultrahighmolecularweightpolyethylene. however, these materials acting as acetabular cups of the implant have been recalled since patients have been feeling uncomfortable and abstained from physical activities. a newly introduced material, 30% carbon reinforced polyetherketone, possess better isotropic mechanical properties and lower wear rates. objective: the research aims to compare the vonmises stresses and deformation in static and dynamic loading of ultrahigh molecularweightpolyethylene to 30% reinforced carbon fiber polyetherketone using finite element analysis.material and methods: an analytical study was performed to evaluate material selection and their contact performances of acetabular cups. four pairs have been analyzed under loading conditions following astm f299613 and iso 72064 standards. the acetabular cups options are made of 30% carbon reinforced fiber polyetherketone or ultrahighmolecularweightpolyethylene. besides, the femoral head and steam options are either alumina ceramic or cobalt chrome molybdenum. results: the yield strength of ultrahighmolecularweightpolyethylene is considerably small, resulting in the acetabular cup to fail when applied to high loading conditions. carbon reinforced polyetherketone with alumina ceramic yielded 65% lower deformation at stumbling phase. conclusion: since the study focuses on linear isotropic material properties, alumina ceramic dominates a higher elastic modulus than cobalt chrome molybdenum, nominating it the best fit combination for lower vonmises stresses, acting on the carbon reinforced polyetherketone acetabular cup.