Implant surgery is divided into three kinds, divided into full-thickness skin, medium-thickness skin and blade-thickness skin. The thickness of full-thickness skin is about 1mm, the average thickness of medium-thickness skin is 0.3-0.6mm, and the average thickness of blade-thickness skin is 0.3mm, and the three are different in clinical application as well as tissue structure. 1. Full-thickness skin: the thickness is about 1mm, including the epidermis and dermis of all, there is no adipose tissue attached, commonly used in the face and soles of the foot and other parts of the defect repair, implantation effect is better. 2. Medium-thick skin: the average thickness is 0.3-0.6mm, including two kinds of skin, one is thin medium-thick skin including epidermis and part of dermis, and the other is thick medium-thick skin which is three quarters of the thickness of the whole skin, which is used for the skin defects after scar excision, as well as the face, joints and other parts of the skin in the clinic. 3. Blade thick skin: also known as thin skin implant, including the dermis and a little papillary layer, mostly used in the oral cavity, nasal cavity defects and burns, such as granulation wounds. The specific thickness of the implant depends on the clinical need, and patients who need to undergo implantation need to actively cooperate with the doctor to ensure that the function and appearance of the implant can achieve the therapeutic goals.