GelatinGelatin Sponge, AbsorbableMatrix Metalloproteinase 2GelatinasesMatrix Metalloproteinase 9CapsulesPolygelinePlasma SubstitutesHydroxyethyl Starch DerivativesMetalloendopeptidasesMatrix Metalloproteinase InhibitorsHydrogelsMicrospheresCollagenFibronectinsMatrix MetalloproteinasesMicroscopy, Electron, ScanningGerm LayersCollagenasesTissue Inhibitor of Metalloproteinase-2Smear Layer