Chronic wounds heal more than 6 weeks, primarily include foot ulcers - a common complication of diabetes resulting in poor blood flow - pressure ulcers and leg ulcers caused by high blood pressure in the veins of the legs.

The new dressing made from recycled eggshells, has a very low cost and helps to protect the wound from bacteria, accelerating her healing. From 7 to 8 eggs are used to create the standard size of the dressing 10 cm x 10 cm, which is similar in structure to the extracellular matrix of human skin. To use as an eggshell treatment, it is sterilized, the inner shell is peeled, pulverized and placed on a material which can be placed on the wound.