Bilyk S. Biplanar overbone osteosynthesis via a limited contact dual derotational plate for use in bone fractures

The dissertation develops a new method in over-bone osteosynthesis - the biplanar fixator with limited contact. This novel method is based on systematic research, mathematical and computer modeling, as well as experimental biochemical and morphological investigation. The conducted research, grounded in an appropriate number of observations, determines the indicators of deforming fixators and the formation of bone calluses through an examination of mathematical as well as clinical roentgen results. The author develops a mathematical model of a dual derotational plate; mathematical calculations determine the plate's optimal form and dimensions for a given anatomic loci and type of fracture. The dual derotational plate's superiority is further confirmed by experimental research of the particular properties of reparative regeneration of bone matter in animals (via roentgen and histo-morphological investigation). The efficacy of the biplanar fixation is confirmed by human trials. (161 patients). Roentgen investigations prove that the healing of fractures in the majority of patients takes place via formation of a periosteal normotrophic callous and serves as the optimal solution to the micro-motion of bone fragments. The using area is a medicine.