The effects on superficial wounds in domestic pigs of (1) two different occlusive dressings, (2) nonocclusive wet to dry gauze dressings, and (3) air exposure were compared. Collagen synthesis and reepithelialixation were increased in the wounds treated with occlusive dressings. Re-epitheliahzation was increased beneath both the oxygen-impermeable and the oxygen-permeable dressing. When they were removed the wet to dry gauze dressing and one of the occlusive dressings often damaged the new
epidermis.