The primary goal in the treatment of chronic soft tissue wounds is to obtain wound closure. Usually necrotic tissue is debrided, i.e. surgically removed, to assess the full extent of the damage, to detect underlying abscesses or other pathologies causing the non-healing of the wound. Wet - to - wet dressings are primarily applied to induce a healing process. As second line attempts to obtain closure special dressings like semipermeable films, gels, hydrocolloids and calcium alginates are applied. These expensive dressings are associated with extended time periods of conservative treatment until closure can be observed.