Static load test of the modified sliding hip screw: the DHS-AF®

OBJECTIVE: To analyze the in vitro mechanical strength of the DHS-AF®. METHODS: We evaluated the in vitro resistance of a sliding bolt modified by the addition of a connector system, DHS-AF®. RESULTS: The changes performed by the authors allow the exchange by the surgeon of the sliding bolt without the need to remove the plate and disassemble the entire device to reposition it properly. We conducted a static bending test to evaluate maximum strength, stiffness and ductility of the system. DHS-AF® showed satisfactory mechanical properties when compared to other conventional devices which use the same principle. CONCLUSION: Based on these results, the authors propose the use of this new implant in further in vivo studies. Level of Evidence III, Analytical Study.