regeneration was recorded for materials A and B in comparison
with hyaluronic acid (Fig. 1).
In the histological survey at day 7, we observed a considerable
increase in the infiltration of chronic inflammatory cells with a
weak scaffold of collagen fibers and slim layer of epithelium covered
thewound surface in control group. In addition, in the samples
of materials A and B, we found significant reduction in the number
of inflammatory cells, considerable amount of collagen fibers with
fibroblast proliferation, and relatively complete integrity between
the epithelial cells with normal thickness under the granulation tissue.
However, in the samples of hyaluronic acid, the epithelial cells
regenerationwas obvious and the infiltration of chronic inflammatory
cells with blood vessels was observed among the epithelial
rete processes and deep in the connective tissue (Fig. 2).