Tissue-engineered Skin Graft Repair of Autologous Scar Dermal Scaffolds

"1. scar excision. The thickness of scar tissue in the middle of scar is removed with a roller cutter and the thickness is about 0.01 -- 0.02mm.~2. take autologous skin slices of the patient with an electric skin knife, cut out a small piece of skin, and prepare autologous epidermal basal cell suspension for use;The rest of the skin should be the same size as the wound.~3. the prepared autogenous scar dermal stent was grafted onto the scar resection wound surface, and the prepared autoepidermal basal cells were sprayed between the mesh and on the dermal stent, and autologous skin slices were grafted onto the wound surface and fixed with pressure bandaging;~4. after the operation, the outer dressing should be changed regularly according to the conventional treatment, and the wound surface condition should be observed and recorded according to the experimental scheme."