Panchenko S. Spatial-numerical models of the stress-strain state and strength of the "bone-fixator" system of osteosynthesis of articular ends of crus bones

The object of research is the osteosynthesis models of malleolus fractures and high tibial wedge osteotomy (HTWO), and fixator-plates. The aim of the research is justification of fixator-plates efficiency. The method of investigation is numerical experiment. The problems of stress-strain state (SSS), strength and stiffness of the "bone-fixator" system at osteosynthesis (artificial joining of bone fragments) of cross malleolus fractures, and at osteosynthesis of HTWO are studied. The SSS is investigated by the finite element method implemented in universal software. For all types of osteosynthesis, the research program includes: 1) development of 3D numerical models; 2) numerical analysis of the SSS of the "bone-fixator" system elements; 3) estimation of strength and stiffness of well-known models and their low-invasive modifications used at malleolus fracture osteosynthesis; 4) study of the influence of the cortical bone orthotropy on the SSS of the "bone-fixator" system on a hypothetical model of orthotropic cortical fibia tissue at low lateral malleolus fractures osteosynthesis; 5) analysis of fixed screws effects and of the influence of structural features of fixator-plates used for HTWO osteosynthesis. The results of the work were used at fixator-plates designing and in educational process. The field of application are science and medical (traumatology).