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. 2019 Aug 28;14:279. doi: 10.1186/s13018-019-1331-6

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© The Author(s). 2019

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. 1 — The best-fit sphere model implanted in the true acetabulum in Mimics. a Center (O), radius (R), reaming center (C), and the positioning line (H). b The positioner with two and three brackets (c, d). Diagrammatic drawing of the positioner and relevant parameter (e)