Chronic soft tissue wounds represent a difficult problem for patients and doctors as well. Chronic wounds can be caused by internal and dermatological diseases like venous ulcers as a consequence of venous insufficiency, arterial ulcers as a consequence of peripheral occlusive vascular disease, the diabetic foot stemming from diabetes and other pathologies. A different reason for chronic wounds could be prior traumatic injuries (war wounds, traffic accidents)not showing a tendency to heal after surgical repair.