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. 2020 Jul 23;14(4):421–429. doi: 10.31616/asj.2019.0357

Fig. 2.

Fig. 2.

Schema describing the mechanism of sagittal correction in the LIF group. (A) Before surgery. (B) The LIF cage does not provide optimal lordosis but increases the disc height. (C) Optimal lordosis can be achieved with the addition of PCO and PSF. LIF, lateral lumbar interbody fusion; PCO, posterior-column osteotomy; PSF, posterior spinal fusion.