Biomechanical analysis of tibia 每 double threaded screw fixation

作者：W Walke; J Marciniak; Z Paszenda; M Kaczmarek

来源：Archives of Materials Science and Engineering, 2008.

• Numerical techniques
• Finite Elements Methods
• Biomaterials
• Mechanical properties

Purpose: The aim of the work was determination of biomechanical characteristics of a tibia 每 double threaded screw system with the use of finite element method.Design/methodology/approach: Geometrical model of the tibia was worked out on the basis of data from computer tomography of real bone. Geometrical model of the double threaded screw was prepared in ANSYS v. 11. Meshing was realized with the use of SOLID95 elements, applied in analyses of volumes. The model was loaded with forces in the range F = 100-2000 N.Findings: Initial biomechanical analysis, carried out with the use of finite element method, showed usefulness of the analyzed form of the double threaded screw made of Ti6Al4V alloy in fractured tibia treatment.Research limitations/implications: Due to applied simplifications of the tibia 每 double threaded screw fixation model, the analysis results should be experimentally verified in laboratory conditions.Originality/value: The obtained biomechanical characteristics of the tibia 每 double threaded screw system (u = f(F), 考max = f(F)) are the basis for selection of degree of strain hardening of the applied metallic biomaterial and optimization of geometrical features of the analyzed form of implant. Appropriate selection of mechanical properties and geometrical features of the implant is the main factor determining a stability of the fixation.