Dermatization, also known as scraping, is the most commonly used method of medical cosmetic skin changing technology in clinic. Grinding often uses grinding head to grind epidermis and dermis in a controllable mechanical way.

Repair mainly depends on basal cells in epidermis, spinous cells near basal layer and residual skin appendages such as hair follicle wall, sweat gland wall and sebaceous gland wall. When the wound heals, the tissue on the skin surface can change, and the collagen fibers and elastic fibers in the dermis can be rearranged. Remaining skin appendages (hair follicles, sebaceous glands, sweat glands) will quickly form a new epidermis, leaving almost no scars on the wound surface, thus completing treatment and beauty.