Biomechanical features of internal fixation methods in tibial fractures
25 fresh cedaver tibias were used for biomechanical testing of different internal fixation methods in tibial fractures. 45 degree oblique fractures were created in the middle 1/3 of the diaphyses. 1O tibias were tested for intramedullary Ender nailing, 8 for intramedullary Kuntscher nailing, 7 for plate-screw fixation. Test specimens were subjected to axial compression, lateral bending and torsional forces. Plate osteosynthesis was found to be the most resistant to compression forces and Kuntscher and Ender nailing followed. As for bending, Kuntscher nailing was the most reliable and then came plate fixation and Ender nailing. For torsional stresses, the order was plate osteosynthesis, Ender and Kuntscher nailing. Ender nails were elastic and the deformation disappeared as the forces were removed. This was an advantage for Ender nails.