Yeshchenko V. The stress-strain state of metal osteosynthesis biomechanical systems

Developed and studied the deformable enviroment models of damaged biological structures, metal osteosynthesis constructions and implants. With the use of information technologies and numerical SSS simulation algorithms of biological structures connected with the manufactured bodies the first time developed a method for calculating the parameters of functional reliability biomechanical system (BMS) with osteosynthesis and implants. On the basis of estimates of the main indicators of the BMS limit state for the first time evaluated the functional reliability BMS "lower limb fracture and the external apparatus fixation of bone fragments" while transporting the patient in sanitary wheeled vehicle across the off-road, bending of knee BМS with loss of patella ties rigidity and two types of bone dysplasia, mandibular BMS with fracture and osteosynthesis and BMS "jaw - mono-implant - supra-construction" under the functional load. A software algorithm "Chitach" was created to analyze the surfaces contact areas and gradients values of contact pressure (copyright certificate № 49485; appl. 14.03.2012; registered 18.05.2012). The results of this work are used in justification planning strategies of surgical intervention to restore biomechanical functionality of the BMS of the human body by leading doctors in Kyiv. Keywords: deformable model of biological bodies, biomechanical osteosynthesis system, stress, deformation, bone, cartilage, ligaments, functional load, СT, CAD, CAE information technology, computational experiment.