Figure 1.
Osteosynthesis with Locking Head Screws without and with axial load and callus formation only at the trans cortex.
Figure 2.
Osteosynthesis with DLS without and with axial load and circumferential callus formation.
Figure 3.
DLS – Dynamic Locking Screw with PIN-Sleeve-Design.
Figure 4.
Specimens had a diameter of 27's modulus of 16.7 GPa.
Passive markers were attached to both cylinders and the LCP to perform the measurement with the optical motion analysis system.
Figure 5.
Axial load was applied by a universal testing machine. 3D-motion at the fracture gap was measured with an optical motion analysis system and visualized by vectors. Raw data of the 3D-motion of every passive marker was analyzed using the software MATLAB.
Figure 6.
In comparison to the LS, the DLS showed a biphasic stiffness distribution with an initial and a secondary stiffness.
The initial axial stiffness of DLS was 612.4/mm and secondary stiffness was 2301.9 N/mm. The mean LS axial stiffness was 2394.9 N/mm.
Figure 7.
With application of a 200(0.210 mm; SD ± 0,004 mm) (compared to the LS group (0.033 mm; SD ± 0.02 mm).
Figure 8.
With application of a 500(0.49 mm; SD ± 0,008 mm) compared to the LS group (0.089 mm; SD ± 0,03 mm).
Figure 9.
With the same pitch angle of the osteosynthesis plate, interfragmentary motion is higher using the DLS than the LS.