Table 1.

Biodegradable polymer matrices (adapted and developed from [9]).

Biodegradable Polymers
Natural	Synthetic
Polysaccharides: Starch, Cellulose, Chitin Proteins: Collagen/Gelatin, Casein, Albumin, Fibrinogen, Silks Polyesters: Polyhydroxyalkanoates Other polymers: Lignin, Lipids, Shellac, Natural Rubber	Poly(amides) Poly(anhydrides) Poly(amide-enamines) Poly(vinyl alcohol) Poly(vinyl acetate) Polyesters: Poly(glycolic acid), Poly(lactic acid), Poly(caprolactone), Poly(orthoesters) Poly(ethylene oxides) Poly(phosphazenes)