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Volumetric visualizations of HMDS-dried osteochondral samples from OARSI grades 0–4 imaged with a desktop μCT. The white arrowhead refers to the border of zone 1 (0–10% from the AC surface) and zone 2 (10–40%); the gray arrowhead refers to the border of zones 2 and 3 (40–100%). The OARSI grade 4 sample shows erosion into the deep zone (i.e., the complete degeneration of the surface zone and advanced degeneration of the middle zone).
