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. 2022 Dec 1;23:1038. doi: 10.1186/s12891-022-06018-w

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — A 53-year-old female patient with L4/L5 two-level lumbar spondylolisthesis a, b, c refers to the preoperative lumbar lateral and whole spine lateral X-ray; d refers to the lumbar CT sagittal reconstruction, showing the anterior slippage of the vertebral body; e, f, g refers to the lumbar lateral and whole spine lateral X-ray after two-level unilateral TLIF, which shows that the sagittal imbalance is significantly improved; h, i refers to the satisfactory internal fixation position during the follow-up at 12 months after operation, and no loss of sagittal correction is observed