Figure 3.
SEM photos of prilocaine-loaded micro-particles with (a) Resomer R202 (PLA, average MW 10,000-18,000), (b) Resomer R203S (PLA, average MW 18,000-28,000), (c) Resomer R207 (PLA, average MW 209,000) polymers. Images of the same batches recuperated after 96 hr. of drug release studies are also reported: (d) Resomer R202, (e) Resomer R203S, (f) Resomer R207 [39].