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. 2018 Nov 13;19:397. doi: 10.1186/s12891-018-2320-3

Fig. 4.

Fig. 4

Intraoperative application of the external template. a-b Preoperative AP radiographs/3D reconstruction of computed tomography images for a patient with a Denis zone II sacral fracture and bilateral pubic ramus fractures. c-f Intraoperative fluoroscopy (d/e/f outlet/inlet/lateral view) was used, minimally, to confirm the guide wire and screw in the target corridor. The red arrow in (c) indicates the guide sleeve for the anterior column screw. g-i Postoperative AP radiograph/computed tomography axial image confirmed the placement of the IS screws