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

Figure 3

Histologic specimens of the medial meniscus tissues at 6 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 more than 50% extending from peripheral area of the tears with localized existence of fibrochondrocytes. ((c) and (f)) In both groups, the fibrous tissue was partially stained with safranin-O (black arrow) and some chondrocyte-like cells (arrowhead) were identified in peripheral area of the tears.

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