But there are hardly mechanical and numerical examinations, the surgeon's experience weighs heavily in the decision of socket position. In order to evaluate effecting of SSM, first, we compared it with a general optimization method. Next, the SSM was applied to obtain the appropriate socket position for a geometric model of pelvis constructed from a series of CT photograph of a patient. Further, by using a finite element analysis, we found that the socket position has an equal aptitude to surgeon's decision from the mechanical point of view. Recently, some mesh-less finite element methods, they need no element data, have been proposed by many researchers, and they have took much attention from following reasons.
Calculations are getting larger, the degree of freedom is more than a hundred million.
Improved performance of computer and parallelization technique cut off the time required by processing of solving stiffness equation. However, the cost of pre-processing is getting higher. Mesh-less methods make the cost lower, since it is not necessary to prepare element data in advance. On the other hand, the adaptive methods have been developed by a number of researchers for usual FEM in order to get more accurate results efficiently.