“…Currently, biomaterials that have been proposed and tested on lab animals are: polycaprolactone (Reed et al 2009), polyethylene glycol (Briggs et al 2009), polyvinylalcohols ), polyurethane (Shin et al 2009), collagen (Lin et al 2008), silk (Silva et al 2008), alginate , Penolazzi et al 2010, starch (Martins et al 2009) . The most interesting, however, is chitin, a substance of animal origin which is part of the external shells of invertebrates and the cell walls of bacteria and fungi (Tuzlakoglu et al 2004, Majima et al 2007).…”