[Experimental study of the optimization of the hip endoprosthesis]

Clinical and laboratory investigations have resulted in a new design for the shaft prosthesis of the "St. Georg" model total hip prosthesis, the purpose of which was to minmize the risk of biomechanical complications. The original method of attachment and the same material for the limb were retained for our investigations. It was possible to test the bending strength, the length, and the geometry of the shaft as well as how structure of the bearing surface of the collar influences the force flow within the compound system. The distrubances produced in physiological force flow produced on insertion were also investigated. The results obtained enabled us to design a new shaft prosthesis.