Abstract: Recently two types of discontinuities have been observed in the structural simulations of proximal femur.The first type called near field behavior appears in areas near distributed load application and is characterized by a checker board pattern of density.The second type of discontinuity called far field behavior appears remote from the load application and is characterized by strut or column like regions of elements.In fact,the far field discontinuity is an accurate representation of bone physiology and morphology.On the other hand,the near field discontinuity is a false representation of bone structure and violates the continuum assumption underlying the finite element method.The objective of this article is to devolop structural simulation of proximal femur as a self organizatinal control process by M.G.Mullender(1993),with the finite element method and bone self-optimization theory.The end configuration not only eliminates the checker-board density distribution typical of the early models,but also predicts a reasonably accurate density distribution.

Key words: structural simulation, bone self-organizational control process, bone self-optimization theory, finite element method, femur