Comparison of cannulated screws and dynamic hip screw for the treatment of intracapsular femoral neck fractures

canulated drill of the same diameter. It is locked parallel to the joint in 3 different directions with angular stability with threaded wires. Materials and Methods: 16 radius sawbones were osteotomised corresponding to a A3 Fracture and stabilised with a angle stable plate (8) and XS nail (8). 1000 alternating load cycles from 20– 200N were performed and the deformation was registered. Also a FE analysis with the MSC Patran/Marc softwere were performed. Due to the results we developed a anatomically adapted XS radius nail. The results of the first 100 patients are presented. The clinical results of the first 100 patients treated with the XS Radius nail were prospectively analysed. Results: Both devices show good biomechanical results. Both types of osteosynthesis showed good stability. The deformation of the XS group however was 20% lower. Also the calculated deformation in the FE study was 20% lower. In the first 100 patients one partial loss pf reduction and two threaded wire breakage were observed. Conclusion: The XS nail has the advantage of mainly intraosseous position, simple operation technique with introduction over a guide wire from the proc. styloideus radii and over drillingwith a canulated drill of the same size as the nail.