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. 2017 Nov 14;12:173. doi: 10.1186/s13018-017-0676-y

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© The Author(s). 2017

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 — Typical case I: female, 41 years old, pain for 48 months. a Preoperatively, Lysholm score 74, CA 25°, PTA 10°, and PLS 9 mm; CT scan showed Wiberg IV patella. b After the operation on the left knee, Lysholm score 75, CA 1°, PTA 9°, and PLS 8 mm; CT scan showed approximate Wiberg II patella