Study of the Stress-Strain State of the "Bone–Fixation Plate" System in Conjunction With Cortical Tissue Mechanical Properties

Background. Bone osteosynthesis is considered one of the most efficient methods treating fractures long tubular bones. Deve­lopment modern computer technology and specialized software makes it possible for a traumatologist to perform preliminary efficiency estimation using fixation plates various designs. Results such studies can significantly depend on calculation model parameters. In papers related study stress-strain state “bone–fixator” systems, bone tissue as homogeneous, isotropic, elastic medium. However, in fact heterogeneous has an anisotropy mechanical characteristics. Accordingly case simplified isotropic tissue, when performing calculations, there possibility obtaining inaccurate results. Objective. Estimation influence orthotropy physical properties system. Methods. The performed environment based finite element method. Osteosynthesis low transverse fracture fibula smooth plate selected computational case. Two models terms geometry are constructed solve problem. These different only cortical tissue. Results. Analysis stress elements indicated that normal stresses reached highest values, tangential relatively small. addition, character distribution turned out be inhomogeneous. patterns qualitatively similar both models. A common feature maximum all result their concentration. Conclusions. Consideration parameters led significant quantitative changes indicators state. It established minimum safety margins by tensile acting vertical direction. estimating strength also occurs considered, but not considered. If bone, pattern qualitatively. directed along tangent circumference cross-section unsafe. Calculations results indicate comparative estimations order identify efficient, strength,