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Figure 3 | BMC Musculoskeletal Disorders

Figure 3

From: Comparison and prediction of pullout strength of conical and cylindrical pedicle screws within synthetic bone

Figure 3

The mechanism of the Integral formula to predict the pullout strength of the pedicle screw with variable distributions of outer and inner diameters ( i.e ., conical or cylindrical screw). The diagram shows the insertion of a conical shaped screw into the synthetic bone. The bone chips within the region ABCD was assumed to be squeezed into the region CDE. See the text for the detailed meaning of the symbols.

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