Figure 3

Histological sections stained with H.E. Histopathological aspect of POF exhibiting the high cellular area on the top and the extensive mineralization on the bottom of the field. Note that the mineralized area showed bone trabeculae organized parallel to each other, and there was a clear distinction between the mineralized and more cellular areas (A). The top of the gingival growth was frequently ulcerated with presence of inflammatory cells (arrow) (B); the proliferating cells were big, round (arrow) and no clear distinction could be seen among them, (C). Nodules of cementum could be often observed (C’). Bone trabeculae were immature, presenting osteoblasts in their periphery (arrow). This area was rich in blood vessels (D).