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. 2017 Nov 28;17:137. doi: 10.1186/s12903-017-0428-8

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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. 4 — Boxplots presenting the scores for residual stain of the non-surgical approach. Medians with interquartile ranges are presented by boxplots. Scores were ranging from one (residual stain >95%) to six (residual stain <5%). TT - Tip of the threads, AT - Apically facing thread surfaces, BT - Area between threads, M - Machined surface area, R - Rough shoulder area