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Figure 1: (a) Preoperative sagittal T2-weighted magnetic resonance imaging; Postoperative (b) lateral and antero-posterior (c) X-ray showing the L4-S1 dynamic fixation

Figure 1: (a) Preoperative sagittal T2-weighted magnetic resonance imaging; Postoperative (b) lateral and antero-posterior (c) X-ray showing the L4-S1 dynamic fixation