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. Author manuscript; available in PMC: 2021 Jul 19.
Published in final edited form as: ACS Biomater Sci Eng. 2020 May 27;6(6):3464–3476. doi: 10.1021/acsbiomaterials.9b01939

Figure 4. Col I/II hydrogel promoted cartilage tissue repair in vivo.

Figure 4.

HE staining of repaired cartilage left empty or filled with either a Col I or Col I/II hydrogel in the trochlear groove (TG) or the medial condyle (MC) at two different magnifications (2x with a scale bar of 500 μm and 10x with a 200 μm scale bar). Staining revealed that the cellular morphology in the Col I/II hydrogels matched that of articular cartilage tissue surrounding the repair tissue. The two arrowheads indicate the edges of the repair tissue. A single arrowhead with an arrow indicates the edge of the repair tissue and the direction of the repair tissue, respectively.