-Collagen fibers
-Collagen fibers
Collagen is a biodegradable material obtained from bovine skin. The hydrogel is formed by cross linking collagen in 5 to 15 percent aqueous solution .(4) The collagen fibers are flexible but offer great resistance to pulling force ,and has great tensile strength decreases with increasing fiber diameter .The transparent hydrogel which has a high oxygen permeability can be processed into soft contact lenses ,sutures where collagen as strong as silk, as well as it is used in coating all fabric used in heart prostheses .(18)