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. 2021 Jul 28;21:380. doi: 10.1186/s12903-021-01716-8

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© The Author(s) 2021

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/. 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 in a credit line to the data.

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Fig. 1 — Landmarks and measurements. A AF, anterior fossa; AC, anterior condyle; SF, superior fossa; SC, superior condyle; PF, posterior fossa; PC, posterior condyle; SS, superior space; AS, anterior space; PS, posterior space; AIC, anterior inclination of the condyle; PIC, posterior inclination of the condyle. B MF, medial fossa; MC, medial condyle; LF, lateral fossa; LC, lateral condyle; MS, medial space; LS, lateral space; MIC, medial inclination of the condyle; LIC, lateral inclination of the condyle. C LAC, long axis of the condyle; MAC, minor axis of the condyle. D IE, inferior eminence; IFP, inferior fossa posterior wall; HF, height of the fossa; WF, width of the fossa; AEI, articular eminence inclination. E IGA, incisal guidance angle. F OPA, occlusal plane angle