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

Figure 1

Four types of screws used in this study: (a) UPPS, (b) PAPS, (c) MAPS, and (d) NIS.

(a)

(b)

(c)

(d)