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. 2021 Feb 19;9:639006. doi: 10.3389/fcell.2021.639006

FIGURE 9.

FIGURE 9

Histological evaluations of the samples in control and biphasic groups at 12 weeks post-operatively. HE staining images of control (A–A2) and biphasic (F–F2) groups. Toluidine blue staining images of control (B–B2) and biphasic (G–G2) groups. SO/FG staining images of control (C–C2) and biphasic (H–H2) groups. Collagen II immunohistochemical staining images of control (D–D2) and biphasic (I–I2) groups. Collagen I immunohistochemical staining images of control (E–E2) and biphasic (J–J2) groups. The black arrows separate native cartilage and neocartilage. The red arrow indicate neo-bone matrix.