Effect of Leukocyte-Rich and Platelet-Rich Plasma on Healing of a Horizontal Medial Meniscus Tear in a Rabbit Model

Figure 2

Histologic specimens of the medial meniscus tissues at 4 weeks after surgery. Sections (a), (b), and (c) are a control group. Sections (d), (e), and (f) are PRP group. Sections (a), (b), (d), and (e) are the sections stained with hematoxylin and eosin (H&E). Sections (c) and (f) are the sections stained with safranin-O. ((a) and (d)) In both groups, the meniscus tears were filled with fibrous tissue about 25% extending from peripheral area of the tears with localized existence of fibrochondrocytes. ((c) and (f)) The fibrous tissue was partially stained with safranin-O (black arrow) and chondrocyte-like cells were present (arrowhead) in peripheral area of the tears.

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