The importance of computer aided measurement techniques as a means of controlling industrial manufacturing and testing technical products with high accuracy increases ever more with the general goal of improving the quality of all kinds of products. This development started about twenty years ago and is still improving. Especially computer aided co-ordinate metrology is a very important and universal tool for solving complex measuring tasks for workpiece metrology. This measurement technique can also be applied to evaluate the shape of non technical structures, for example, human limbs or joints with high accuracy. The results of such measurements provide the basis for the improvement and optimization of future work in endo prosthesis.