If you want to whiten your teeth quickly, you can do so by means of cold light whitening and aesthetic restorative dentistry. The teeth can be made white by professional scaling techniques. But it can only remove the pigment on teeth that should not be there. The color of normal teeth is yellowish because inside the transparent enamel is a layer of yellowish dentin. Usually, it is important to keep your teeth clean by brushing them. Brushing not only removes food debris, soft scale and some plaque from the surface of the teeth in the mouth, but also massages the gums, etc. The recommended toothbrush should have a relatively small brush head, be easy to partition and scrub, and rotate flexibly. There is a proper distance between the bristle bundles. The height of the bristles is appropriate and the bristles are in a columnar shape to prevent stabbing or bruising of the gums. In addition, the toothbrush itself should be easy to wash to be able to keep clean better. Currently, electric toothbrushes are also a good choice. When choosing toothpaste, it is important to decide according to personal preference, price and fragrance and certain special needs. Generally, toothpaste of rubbing agent type has better whitening effect. Brushing methods are vertical brushing method and horizontal quiver vertical movement method. The former is to brush the teeth with the head of the toothbrush angled toward the gums and the bristles attached to the gums, with slight pressure, along the gap towards the crown. When brushing the upper teeth, brush from top to bottom, and when brushing the lower teeth, brush from bottom to top. The latter is done by adding a short horizontal chatter to the former. It is best to brush your teeth after three meals and once before going to bed. If there is no way to brush after meals, then at least brush in the morning and before going to bed, and especially always before going to bed. A brushing time of 3 minutes per session is appropriate.