Introduction. The treatment of femoral diaphyseal fractures by intramedullary nailing has become a common procedure in\northopaedic surgery. The purpose of this numerical simulation was to present how the changes in configuration of the\nstabilisation system can affect the stress and displacement state in the bone tissue and implanted device. Material and Methods.\nThe numerical comparison of the stabilisation variants for the type 32-A2 femoral diaphyseal fracture (according to the AO\nclassification) performed by using the Charfix2 (ChM�®) anatomical nail locked in a number of chosen ways. The displacement\nand the stress distributions both in the bone and implant were obtained and analysed by computational simulation. Results. In\nall models, there was the same characteristic distribution, which shows there were minimal rotational movements of the bone\naround the anatomical axis. In all cases, stress concentrations were generated in the nail material in the area of the fracture gap.\nConclusions. The obtained results indicate that there is a visible advantage to one-plane distal stabilisation in the reduction of\nstresses regardless of the type of proximal stabilisation. The results of calculations indicate that the use of proximal stabilisation\nwith a neck screw reduces the possibility of damage to the implant.
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