Fig. 5.

A, Two weeks after grafting. The basement membrane did not connect (small arrowheads). Collagens of the dermis layer were thin and short (right arrows). B, Four weeks after grafting. The basement membrane is recognized under all keratinocytes (right arrow). Collagen fibers became thick and were longer. Type VII collagen was observed between the basement membrane and the collagen of the dermis layer (small arrows). Type VII collagen played a role of the anchor. C, Six weeks after grafting. Basement membrane was recognized clearly (right arrow). A lot of collagen fibers were thick and facing various directions (small arrowheads).