Table 2. Healing standard by light microscope.

Grade	Pathological manifestations
1	Normal epithelium, absence or slight cellular infiltration, absence of hemorrhagic areas, ulcerations
2	Mild vasodilation or re-epithelialization, mild inflammatory infiltration with mononuclear prevalence, absence of hemorrhagic areas, edema, ulcerations
3	Moderate vasodilation, epithelial degeneration, inflammatory infiltration with the prevalence of neutrophils, presence of hemorrhagic areas, edema and eventual ulceration
4	Severe vasodilation and edema, inflammatory infiltrate with the presence of neutrophils