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. 2022 Oct 6;8:41. doi: 10.1186/s40729-022-00430-6

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — A Comparison of the angulation in interdental gap (positions 35 and 36) against free end (positions 45, 46 and 47). n = 60 (12/18/12/18). B Comparison of the angulation within the free end positions (45, 46 and 47) to show increasing inaccuracies with growing distance to the marker. In each case, the distribution spectrum and the corresponding median value are shown. Statistically significant values are shown with an asterisk (*). n = 36 (6/6/6/6/6/6)