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. 2023 Oct 5;13:16750. doi: 10.1038/s41598-023-42404-7

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© The Author(s) 2023

Open Access This 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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Cartilage thickness mapping of the PF joint with a patella cartilage defect in the lateral region. (A) Confined type, where the defect of the patellar cartilage does not extend to the original boundary of the cartilage. Each image is placed in the same order as in Fig. 7. Images framed in green show that the femoral cartilage defect does not reach the edge of the trochlea, and those framed in blue show that the femoral cartilage defect reaches the edge of the trochlea.