Figure 4From: Experimental study of PLLA/INH slow release implant fabricated by three dimensional printing technique and drug release characteristics in vitro Observation of the implant under microscope. A: Microstructure of barrier layer (500×); B: Microstructure of the drug release area; the white arrows shows the INH (300×); C: Microstructure of the tablet after 30 days of drug release (400×).Back to article page