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. 2022 Aug 22;31(4):1583–1592. doi: 10.1007/s00167-022-07092-2

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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/.

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Fig. 1 — Preoperative osteotomy planning. A–C Based on long-leg weight-bearing X-rays, a deformity analysis was conducted preoperatively. D After defining the CORA, a software-guided osteotomy simulation (TraumaCAD™) was conducted based on the technique described by Miniaci. E Modified planning was performed with a previous JLCA correction using the JLCA-2/2 formula and subsequent OW high tibia osteotomy. The influence of the simulated osteotomy is directly visualised by the change of the geometrical joint parameters “Pre” (operative) and “Post” (operative)