ABSTRACT
Medical treatment not only for recovery of diseased regions, but also for restoration to normal functions is not an unrealistic ideal; it has become a practical target. Such medical treatment is called reconstructive surgery and regenerative medicine. Biodegradable polymers are used as materials for reconstructive surgery if the body itself has a potential for cure, because they are absorbed in the body after cure. If the body has no potential for cure, biodegradable polymers are inserted into disordered regions as a scaffold of cells for tissue regeneration, and they disappear after regeneration of tissues.
