[Biomechanical substantiation of U-shaped plaster cast with elastic bandage in diaphyseal fractures of crural bones].

The authors make a critical analysis of the traditional types of plaster bandages used for the functional treatment of diaphyseal fractures of the bones of the crus. The results of the investigation into the relaxation properties and the dependence of the force of the pressure of the elastic bandage on its relative lengthening are presented. The values of the pressure under the plaster cast using an elastic bandage depending on the crus parameters and the number of the turns of the bandage are defined. On the basis of mathematical modelling the biomechanical substantiation and the recommendations concerning an optimal use of the elastic bandage for the fixation of the plaster cast longuets are given.