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. 2020 Jan 23;21:50. doi: 10.1186/s12891-020-3075-1

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© The Author(s). 2020

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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.

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Fig. 5 — Illustration of the marked difference in postoperative axis deviation between subtrochanteric and supracondylar osteotomies. In green subtrochanteric osteotomy with mal-angulation of 30° in sagittal plane and rotation of 30° resulting in a postoperative mechanical leg axis of 8.6° valgus (preoperative axis 5.1° valgus). In blue supracondylar osteotomy with mal-angulation of 30° in sagittal plane and rotation of 30° resulting in a postoperative mechanical leg axis of 18.2° valgus (preoperative axis 5.1° valgus). In orange visualized the preoperative situation. For visualization purposes the mechanical leg axis has been marked schematically in black