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. 2023 Mar 18;27(6):3233–3244. doi: 10.1007/s00784-023-04938-y

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© The Author(s) 2023

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. 1 — (a), Tooth 2.5. pre-op periapical radiograph, year 1979. (b), Periapical radiograph after endodontic and restorative treatment with cast metal post and crown, year 1979. (c), Post-op periapical radiograph follow-up, year 2004. (d), Post-op periapical radiograph demonstrating success 37 years after primary endodontic treatment , year 2016. (e) Tooth 4.6. pre-op periapical radiograph, year 1982. (f), Periapical radiograph after endodontic treatment, year 1982. (g), Tooth 4.6. post-op periapical radiograph with restorative treatment with a fiber post and radiolucent composite material and a crown, follow-up year 2000. (h), Tooth 4.6. post-op periapical radiograph demonstrating success after 34 years follow-up, year 2016. (i), Tooth 4.4. pre-op periapical radiograph, year 1979. (l), Periapical radiograph after endodontic treatment, year 1979. (m), Post-op periapical radiograph follow-up with restorative treatment, year 2004. (n), Post-op periapical radiograph demonstrating survival in painless function 37 years after primary endodontic treatment, year 2016.