Aesthetic dentistry is a new concept and discipline of modern medical aesthetics. Whenever people meet, their teeth will be exposed, so there is nothing better than teeth to reflect the elegance of people. The standard of dental beauty is: no dental disease, neat, white, no dental disease, no bad taste in the mouth, and can carry out normal chewing function. The new modern cosmetic dental technology is roughly the following: bleaching, scaling, mouthwash, porcelain teeth, veneers, resin coverage, spray powder teeth cleaning, etc., and the more widely used is the first five methods. Bleaching Bleaching is generally divided into external bleaching and internal bleaching, and external bleaching mainly starts from the surface of the teeth. The drug is used to demineralize the surface of the teeth, removing the choice of long-term mineral deposits and revealing the original color of the teeth – chalky white, and the drug used is generally a strong oxidizer – high concentration of hydrogen peroxide. External bleaching and ordinary teeth cleaning are two concepts, teeth cleaning is only to remove the dirt on the surface of the teeth, but the white teeth are not necessarily healthy, because the teeth are not well calcified will also appear white, only through external bleaching demineralization to return the original face of the teeth. Internal bleaching is for the symptoms of pulpal necrosis, and the bleaching drug is injected inside the root canal of the discolored tooth, and then the root canal is sealed so that the drug does not penetrate into the body. Internal bleaching requires a high level of medical skill, but once successful, the whitening effect can be maintained for a long time. Laser bleaching is also one of the bleaching methods, mainly using the laser + drug therapy to make teeth quickly demineralized, the laser is an additional energy, the main effect is still the drug. Scaling The second whitening method is scaling, that is, using ultrasonic whitening, washing away the tooth surface of the soft tartar pigment and calculus, generally due to external causes such as smoking, drinking tea, etc., through the ultrasonic vibration of a very fast frequency to achieve the whitening effect, can be maintained for roughly six months to a year, if poor health care or periodontal disease patients, need to wash once every three months. Mouthwash Mouthwash is also a cleaning method used by people on a daily basis, oral health care through the general antibacterial agent in the water, inhibit the growth of oral bacteria, prevent periodontal disease, so that the teeth are fresh throughout the day. Porcelain Teeth Porcelain teeth, also known as porcelain crowns and porcelain restorations, are a permanent restoration method that can last at least ten years or longer if they are well made. The main principle is a mixture of metal and porcelain, inside is metal, outside is porcelain, not easy to fracture, is worn on the teeth “cap”, no major side effects on health, depending on the nature of the metal on the human body is also different, precious metals and human compatibility is better, relatively speaking, the human body less irritating. Veneers Veneers can be divided into ordinary resin veneers and porcelain veneers. Ordinary resin veneer is in the grinding of part of the tooth after the tooth surface paste resin, keep the tooth shape and the original no difference; porcelain veneer set porcelain and ordinary resin veneer advantages in one, in the aesthetic aspects can replace porcelain teeth, is to improve the yellow teeth of the noble means, it needs to be based on the model for porcelain paste, and then fixed in the tooth surface with bonding, looks really beautiful, in terms of the materials used can overcome the shortcomings of resin.