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H & E staining (original magnification ×40) of (A) The normal minipig knee cancellous bone tissue showing the characteristic structure of cancellous bone with trabecular structure and numerous spaces containing bone marrow. (B) The experimental group showed undegraded scaffold (blue arrow) one year after implantation. The scaffold porous was filled with mixed bone tissue and fibrotic tissue. (C) The regenerated bone tissue of control group showed loose trabecular structure.
