A: Untreated control group HE staining×200; B: Untreated control group VG staining×200; C:Lesioned group 56 days after epithelialization HE staining×200; D:Lesioned group 56 days after epithelialization, VG staining×200 ; E:Lesioned + Treatment group 56 days after epithelialization, HE staining×200;F:Lesioned + Treatment group 56 days after epithelialization, VG staining×200