Teeth can be made white by professional scaling techniques. However, it can only remove the undesirable pigmentation from the teeth. 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. The correct method of brushing your teeth can have a half-hearted effect. There is the vertical brushing method and the horizontal quiver vertical movement method. The former means brushing with the head of the toothbrush angled toward the gums first, with the bristles attached to the gums, with slight pressure, and brushing along the gap toward the crown of the teeth. 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. The time for brushing is 3 minutes each time is more appropriate. Of course, if you want to whiten your teeth quickly, you can use cold light whitening and aesthetic restorative dentistry.