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. 2019 Nov 21;7(1):77–90. doi: 10.1093/rb/rbz039

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© The Author(s) 2019. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Safranin O/fast green staining and toluidine blue staining of repaired tissue showing the cartilage interface and repaired area. (A–D) Safranin O/fast green staining. (E–H) Toluidine blue staining. (A, E) FT cartilage defects with 8.5 mm in diameter. (B, F) FT cartilage defects with 6.5 mm in diameter. (C, G) Osteochondral defects with 8.5 mm in diameter and 5 mm in depth. (D, H) Osteochondral defects with 6.5 mm in diameter and 5 mm in depth. NA, native area; IF, interface; RA, repaired area. Black arrows indicated repaired area