THE CAD MODELLING OF THE HUMAN TIBIA AFFECTED BY FORM DEVIATONS

Abstract

The studies concerning the correction surgery of the lower member which is affected by axial deviations present more and more interest. The sources that lead to the appearance of axial deviations of the lower members are the usages that appear in the knee's articulation and the modifications of the tibia's geometric form as a result of a congenital disease or a malformation. Starting from the CAD (Computer Aided Design) tridimensional model of the human tibia, which we have realized in a previous research, a CAD modeling was made, a modeling which was parameterized by taking into consideration the main parameters that define this type of deviation: the CORA (center of rotation angulation) position and the deformation amplitude. By modifying the parameters we can obtain tibia models with different degrees of deformation. By reassembling the affected tibia in the foot model, we can obtain the model of the affected foot, model which can be used in order to simulate correction surgery techniques.

Keywords

• Keywords:CADmodeling
• CORA
• deformedtibiamodel
• orthopedicsurgery