Microspheres may be defined as microspheres are the substances or compounds which
having free flowing property (powders).Microspheres are consisting of proteins or synthetic
polymers which are biodegradable in nature and ideally having a particle size from 1-1000μm.
Microspheres are also called as microparticals. Microsphere can be manufactured by
various type of material such as glass, polymers, and ceramic microspheres. They are
used in different applications, their use depends on their material and particle size used in
construction