FE model stress distributions of hip prostheses virtually implanted in FE models of a femur (Construct B). (a) Modular hip stem, (b) femur into which the Modular hip stem was inserted, (c) Monoblock hip stem, (d) femur into which the Monoblock hip stem was inserted. Stresses shown are equivalent elastic stresses (Von Mises) in MPa units. Results are for 2000 N axial load. Posterior view is shown.