1 What to eat to whiten your teeth

1. Celery

Celery contains a lot of crude fiber. When you chew celery, it is like cleaning your teeth. , can wipe away the bacteria attached to the tooth surface, thereby reducing the formation of dental plaque. The harder you chew, the more it stimulates saliva secretion, balances the pH in the mouth, and achieves a natural antibacterial effect. 2. Shiitake mushrooms

In addition to making delicious dishes, the mushroom polysaccharides contained in them can also inhibit dental plaque produced by bacteria in the mouth. 3. Wasabi

Not only is it a necessary condiment when eating sashimi, research has found that the isocyanate it contains can inhibit the reproduction of Streptococcus mutans that causes dental caries. 4. Onions

The sulfur compounds in onions are powerful antibacterial agents that can kill Streptococcus mutans that causes dental caries. Fresh raw onions are especially effective. 5. Plain water

Drinking plain water is the simplest and most important way to protect your teeth. Drinking an appropriate amount of water can keep the gums moist and stimulate saliva secretion. After eating food, drink some water to take away the food residue remaining in the mouth. This will prevent plaque formation and protect your teeth. 6. Cheese

Cheese is not only a good source of calcium, but also has other protective effects on teeth. The calcium and phosphate contained in cheese can balance the pH value in the mouth, change the acidic environment in the mouth that is conducive to bacterial activity, and prevent tooth decay. 7. Fruits and vegetables rich in vitamin C

Tomatoes, broccoli, cabbage, kiwi, citrus, papaya, strawberry and other fruits and vegetables are the best sources of vitamin C. Eat more, not only to replenish your physical strength, but also to protect your teeth. 8. Green tea

Contains a large amount of fluorine, which combines with apatite in teeth to resist acid and prevent cavities. The catechins in green tea can reduce Streptococcus mutans bacteria in the mouth that cause tooth decay, and can also remove unpleasant odors from the mouth. 9. Mint

Mint can not only relieve discomfort such as gum inflammation and swelling, but also reduce the growth of bacteria in the mouth.

2 What are the methods of teeth whitening 1. Cold light teeth whitening

Cold light teeth whitening is currently a tooth whitening technology that is popular in Europe and the United States. It can not only remove pigmentation on the surface of teeth, but also penetrate deep into the teeth to achieve the effect of decolorization. Its significant advantage is that the operation time is short, only 30 minutes, it is safe and has no side effects, and its effect is short-lasting, generally lasting more than two years. 2. Ultrasonic tooth cleaning

Ultrasonic tooth cleaning, commonly known as tooth scaling, refers to using scaling instruments to remove supragingival calculus, plaque and color and polish the tooth surface to delay the redeposition of plaque and calculus. . However, because supragingival calculus is often connected to shallow subgingival calculus, professional dental scaling should remove the calculus in the gingival sulcus at the same time. For deeper subgingival calculus, subgingival scaling is required later. 3. Laser teeth whitening

Laser teeth whitening uses a laser whitening device to output a unique wavelength of a semiconductor to excite the tooth whitening gel that has been applied on the tooth surface in advance. At this time, the laser can selectively act on the teeth. The pigment particles catalyze the gel to react with the pigment to remove dental calculus. Its advantage is that it is safe and non-damaging, greatly reducing the possibility of tooth sensitivity.