Effectiveness of resisting torsional loads of various options for osteosynthesis of tibial fragments (according to the results of mathematical modeling)

Recently, there has been a trend towards high statistical indicators of the number bone fractures lower limbs(47.3%), which diaphyseal leg bones make up 45‒56 %. Objective. Conduct comparative analysisof stress-strain state models with fracture tibia under torsional loading combined various optionsof osteosynthesis and depending on patient's weight. Methods. A was modeled in middle third diaphysisof three types — help an external apparatus fixation (EAF), periosteal plate andintramedullary rod Bones were attached to tibial plateau torque 7 Nm 12 Nm. Results. It determined thatthe changes stress levels tissue depend linearly Under simulation conditions stabilizationof EAF intramedullary area found significantly lowerthan level intact bone. In this same zone model bony plate, value bone, but increase weight 120 kg, these almost leveled off. The highest recorded distal part osteosynthesis, inthe proximal one, stresses that exceeded parameters use EAF. largest metal structures is detected plate. Conclusions. (5.8‒9.9 MPa) structure (360.0‒617.0 fracture, at 0.1‒0.2 MPa, 6.3‒10.8 MPa 0.5‒0.9 respectively. partof last remained 11.7‒20.1 MPa.