Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures

Figure 4

(a) Box plot showing the internal rotational stiffness of the three samples. The fixation with 2x plates provided the highest internal rotational stiffness, followed by both that with 3x cerclage wires and that with 1x cerclage and 2x screws which in turn displayed a somewhat similar stiffness, where the difference between groups 1 and 3 as well as those between 2 and 3 were statistically significant. (b) Box plot showing the external rotational stiffness of the three samples. The fixation with 2x plates provided the highest external rotational stiffness, followed by that with 3x cerclage wires and then by that with 1x cerclage and 2x screws, where the difference between groups 1 and 2, groups 2 and 3, and groups 1 and 3 were statistically significant. (c) Box plot showing the axial stiffness of the three samples. The fixation with 3x cerclage wires provided the highest axial stiffness, followed by that with 2x plates and then by that with 1x cerclage and 2x screws, where the difference between groups 1 and 2 were statistically significant.

(a)

(b)

(c)