One type of trauma that requires skin implants is trauma, surgery, and various other causes of skin defects, and when the skin cannot be directly pulled together and sutured, a flap and skin flap together are needed to repair the trauma. Another common type is burn injury. Generally, deeper deep II or III degree burn wounds that cannot heal for more than 3 weeks and are on the deeper side, especially those with a larger extent, also require skin graft repair. For relatively less extensive, deeper deep II or III degree wounds, the wound healing time can be significantly shortened and the severe scar deformity after healing of deep wounds can be reduced or avoided. If treated conservatively, even if individual patients are eventually able to crawl to heal, it takes a long time, involves a lot of unnecessary pain, and is likely to develop severe scar hyperplasia, which affects appearance and function. For the more extensive degree III wounds, it is simply impossible for the wounds to heal without implants. A large amount of nutrients are lost from the trauma, and the long course of the disease can easily lead to infection and even sepsis which is life-threatening. Flap grafts are mainly divided into thin to medium-thick flaps, blade-thick flaps, medium-thick flaps, full-thick flaps, and dermal vascular network flaps. Overall, the thinner the flap, the lower the survival rate, but the smaller the scar in the donor area. Postoperatively, the recipient area shrinks more and has a poorer appearance, and thinner flaps are more difficult to survive, but the donor area shrinks less postoperatively and has a relatively good appearance and function. Therefore, for the face, hands, joints and other important parts, medium-thickness flaps or full-thickness flaps are generally preferred for repair according to plastic surgery principles. As long as the trauma blood supply of the recipient area is good enough and the trauma is not significantly infected, theoretically, any part of the human body with skin defects can be repaired by skin grafting. If there are bones, joints, tendons, or exposed plates, flap repair must be considered. There are better solutions to this method of removing the east wall to repair the west wall with flap implants. One is autologous epidermal cell transplantation, but the culture of epidermal cells takes a long time, and the flap is poorly abrasion-resistant, with more shrinkage in the skin-receiving area, which is mainly in the laboratory stage at present, and the usual application is not yet much. There is also a skin soft tissue expander, by expanding the skin, soft tissue, resulting in excess skin can be more complete repair trauma, especially for scar protrusion. However, it has to be done in stages and is more expensive. In addition, decellularized allogeneic dermal grafting plus autologous edge-thickness skin grafting is more commonly used to achieve the same repair results as medium-thickness flaps and full-thickness flaps for large skin defects in important areas such as hand joints and limbs other than the face. The advantage is that there is little or no scar healing in the donor area, but the disadvantage is that it is more expensive and generally not affordable for many patients.