These materials are used for external applications on the body and may or may not make contact with skin
Synthetic occlusive wound dressing are used for the treatment of burns, granulation tissue, dermatitis, ulceration, blisters, fissures, herpes, and several other skin condition. Shallow wound one that involves the loss of the epidermis, produces a scab when allowed to heal naturally without a dressing ,the scab is rigid ,dry, and porous to the oxygen required by the regenerated tissue , but acts as barrier to dirt and infection, the scab is shed when regeneration of the epermis is complete. The natural scab has disadvantages that is oxygen permeability is limited , not flexible, and that it is prone to cracking and damage and hence vulnerable to infection . Dressing are used for many purposes including protection of the wound from physical damage, covering unsightly wounds , exclusion of infection, absorption of excessive fluids from the wound , preventing of strikethrough (transfer of micro- organisms from the wound to external environment) and improving of patient comfort. Ideally dressing should be soft, pliable, to protect from further injuries, be easily applied and removed, be sterile, lint free and non -toxic. Wound care products are usually made of three layers, wound contact layer, absorbent material and base material. Wound dressing should not also adhere to the wound allowing easy removal without disturbing new tissue growth.