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| Natural | References | |
|---|---|---|
| alginate | 53-54 | |
| chitosan | 55 | |
| collagen | 56-57 | |
| dextran | 58-59 | |
| Synthetic | ||
| poly-lactic-acid | 60-61 | |
| poly-lacticco-glycolic-acid (PLGA) | 62 | |
| poly-ethylene-glycol (PEG) | 63 | |
| poly-vinyl-alcohol (PVA) | 64-65 | |
