A Hybrid Uniplanar Pedicle Screw System with a New Intermediate Screw for Minimally Invasive Spinal Fixation: A Finite Element Analysis

Figure 4

Von Mises stresses nephogram of the four-uniplanar pedicle screw construct with two new intermediate screws under different loading types. Upper left: flexion; upper right: extension; lower left: right lateral bending; lower right: right axial rotation. The maximum von Mises stress of the entire construct under loading was marked with red arrow.

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