Slicing is a method of gaining clearance and is a technique that is more widely used in cosmetic dentistry, and with the widespread use of invisible orthodontics, slicing is becoming more and more popular. Normal teeth can generally be sliced in small amounts, and there are many advantages to slicing, including reduced extractions, shorter treatment times, reduced risk of root resorption, increased aesthetics for those with black triangles, and increased stability for teeth with multiple torsions when properly sliced. There are increasingly better lamellar instruments and medications available that not only polish well, but also promote calcification of the tooth surface. Of course, there are contraindications for lamellar cutting, such as high caries index, poor oral hygiene, tooth sensitivity, enamel hypoplasia and young permanent teeth patients. He Yuhong, Department of Stomatology, General Hospital of Jinan Military District