Ways to advanced external fixation apparatus based on a computer modelling
The infl uence of type, displacement and orientation of trans-bone elements on the stability of bone fragment fi xation in an external apparatus is researched. Th e experiment is performed on a mathematic modell based on the fi nite elements method. Pin placement patterns are defi ned that provide the stiff est bone fragment fi xation in an external apparatus. Clinical approvement of the developed pin placement schemes is performed, frequency of infl ammatory complications is 15% decreased, secondary dislocations decrease is 12,9% and delayed union decrease is 21,8%. Th e developed apparatus confi gurations promote to increase the effi ciency of the external fi xation method.