Teeth whitening is also known as clinical teeth whitening, mainly using dental bleaching technology or dental surface masking technology to achieve the cosmetic effect of visual whitening of tooth color, according to the patient’s specific symptoms, the use of teeth polishing, scaling, sandblasting, cold light whitening and other methods of treatment, so there is no the most effective one said. 1. Teeth polishing: is the use of polishing instruments to remove tooth surface pigmentation and plaque on the gums, prompting the smooth and bright surface of the teeth, so as to achieve the phenomenon of slowing down the plaque and pigmentation attached to the phenomenon can be effectively remove the pigmentation of the tobacco stained teeth, prompting the surface of the teeth to be smooth and clean, and slowing down the pigmentation. 2. Dental scaling: dental instruments are used to remove tartar, plaque and pigment on the gums, while polishing the surface of the teeth to delay plaque and tartar deposition, commonly used ultrasonic scaling, scaling time is short, but prone to cause bleeding gums. 3. Sandblasting: It is the use of air, water, through the controllable spray gun will be polishing particles sprayed to the surface of the teeth to achieve the removal of tartar, plaque, whitening the role of teeth. Sandblasting can effectively remove the tea tartar and tobacco tartar attached to the teeth, thus improving the teeth’s luster. 4. Cold light whitening: It is the use of high-intensity blue light with a wavelength between 480 and 520 nanometers to remove the pigment on the surface of the teeth as well as the deeper layers of the teeth stained with tobacco, so as to achieve the role of whitening teeth. As each patient’s condition is different, the method used is also different, need to be carried out under the guidance of a professional doctor.