Related Experiment Video
Updated: May 3, 2026

Method and Instrumented Fixture for Femoral Fracture Testing in a Sideways Fall-on-the-Hip Position
Published on: August 17, 2017
Static load test of the modified sliding hip screw: the DHS-AF®
Anderson Freitas1, Hélio Ismael da Costa1, Célio José Silva1
1Orthopedics and Traumatology Service, Hospital Regional do Gama do Distrito Federal (HRG-DF), Brasília, DF, Brazil.
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.
Related Concept Videos
Self-Locking Screw
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Machines: Problem Solving II
Upward Impending Motion
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
Impact Loading on a Cantilever Beam
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...
Frames: Problem Solving II

