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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. 3 — Representative case of a 54-year-old patient with medial compartment OA and 6° varus deformity. Based on a long-leg weight-bearing X-ray (A), a deformity analysis was conducted preoperatively. The osteotomy was simulated (TraumaCAD™) based on the technique described by Miniaci but with additional JLCA correction using the JLCA-2/2 formula due to a preoperative JLCA of 4°. The preoperative simulated osteotomy level localised at the medial cortex of the tibia was precisely realised during surgery (C). Subsequent OW HTO was secured by a hinge-protection k-wire (D). Postoperatively (E), the mTFA intersected the tibial plateau at 52%, resulting in a 3° divergence compared to the preoperatively planned intersection point (55% tibial width)