The donor site wound heals by main intention in full-thickness skin transplants (sutured together). The wound heals via reepithelialization in the case of split-thickness skin transplants. Epithelial cells travel over the wound bed from the underlying dermis remnants. New epithelium forms, replacing the grafted skin. In general, skin grafts can be classified as either primary or secondary. Primary skin grafts are taken from one area of healthy skin and used to cover another area that has been injured. For example, a person may use their own skin to cover a burn injury. Secondary skin grafts are taken from another part of the body and used to cover a portion of the body where there is no more viable skin. For example, a person may use skin taken from their buttocks to cover a large area of skin that has been burned. After the skin has healed at the donor site, it is removed from the donor site and attached to the recipient site using surgical stitches or adhesive tapes. The new skin will eventually fall off if none of its own tissue grows back into it. But even when it doesn't, it still works its magic by providing protective coverage until the recipient site is healed again. Skin grafts are one of the most common procedures done by plastic surgeons.