Abstract. The presented system of medical appointment allows building of solid-state models of bone and soft tissues on the basis of computer tomogram data. These models are able to take into account anisotropy of biomechanical properties, to carry out multiple geometrical operations on association of models of bone tissues with various combinations of fixing systems and endoprostheses, to calculate their mechanical characteristics in various physical environments, to carry out the comparative analysis of results of the calculation. The system provides biomechanical justifications of effective methods of diagnostics and treatment of the human musculoskeletal device.