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. 2019 Jun 21;43(11):2519–2527. doi: 10.1007/s00264-019-04361-7

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© The Author(s) 2019

Open Access This 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.

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Fig. 3 — Pre-operative (1 week) and post-operative (3 days) X-ray examinations of a 68-year-old woman with bilateral osteoarthritis. Left: non-resurfaced patella. Right: resurfaced patella. a Anteroposterior position 1 week before operation. b Anteroposterior position 3 days after operation. c Lateral position of left knee joint 1 week before operation d Lateral position of left knee joint 3 days after operation (non-resurfaced). e Lateral position of right knee joint 1 week before operation. f Lateral position of right knee joint 3 days after operation (resurfaced)