Microspheres bioerodible

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Numerous synthetic or natural polymers have been used as matrices for micro- and nanoparticles or -capsules, most of which are biodegradable or bioerodible. Microparticles (or microspheres) are systems in which the drug is dispersed throughout the particle whereas capsules are vesicular systems in which the drug is contained in a cavity surrounded by the polymeric membrane (Couvreur and Puisieux, 1993). 

Journal of Applied Polymer Science 83, No.7, 14th Feb. 2002, p. 1457-64 HYDROPHILIC DRUG RELEASE FROM BIOERODIBLE POLYANHYDRIDE MICROSPHERES Vasheghani-Farahani E Khorram M... 

M.J. Kipper, E. Shen, A. Determan, and B. Narasimhan, Design of an injectable system based on bioerodible polyanhydride microspheres for sustained drug delivery. Biomaterials, 23, 4405-4412, 2002. 

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