Fig. 3From: Inferomedial cortical bone contact and fixation with calcar screws on the dynamic and static mechanical stability of proximal humerus fracturesComparison of the axial compressive stiffness among the four groups: the cortex contact + screw fixation group (a), the cortex contact group (b), the screw fixation group (c), and the control group (d). Asterisk represents a significant difference compared to; number sign represents a significant difference compared toBack to article page