Nowadays, there are many kinds of toothpaste in supermarkets with complete functions. Faced with toothpaste with various functions, consumers do not know how to choose. Does toothpaste have a shelf life? Do you need to change toothpaste frequently? Why is the whitening toothpaste not effective? The following is an answer to some common doubts when you buy and use toothpaste.
1 must I use fluoride toothpaste
American dental health experts agree that fluoride toothpaste is the best choice. The test showed that brushing teeth twice a day with fluoride toothpaste reduced the risk of dental caries by 40%. In the opinion of Wang Weijian, director of the Prevention Department of Peking University stomatological hospital, fluoride toothpaste is not an inevitable choice for people with healthy teeth. Teenagers and the elderly can use it more, but preschool children should use it with caution, and parents should help them to avoid accidentally swallowing toothpaste, which may cause excessive fluoride intake in the long run.
2 what is the composition of toothpaste
Toothpaste is composed of a variety of inorganic and organic substances, including friction agents, detergent foaming agents, adhesives, moisturizers, sweeteners, aromatics, etc. Wherein, the friction agent is the main component of the toothpaste. In recent years, some Chinese herbal medicines have been added to the toothpaste to make a variety of medicated toothpaste. But don’t worry, all ingredients are safe.
3 why is the whitening toothpaste not effective
Because the main component of toothpaste is friction agent, its basic function is to clean the mouth, and its whitening, desensitization, hemostasis and other effects are auxiliary. The shape of the friction agent particles of whitening toothpaste is relatively special, which is more conducive to removing stubborn stains on teeth, so it can achieve the effect of whitening teeth to a certain extent. However, Wang Weijian pointed out that this toothpaste is only limited to removing extrinsic color spots on teeth, such as the “pollution” of teeth caused by long-term drinking of coffee, tea and smoking. It has no effect on deep endogenous color spots caused by abnormal tooth development such as tetracycline teeth and fluorosis teeth.
4 does toothpaste have a shelf life
When many people buy toothpaste, they find that some toothpaste has a shelf-life indicated on it, while others do not. Wang Weijian introduced that toothpaste has a shelf life, because the chemicals contained in it will react after being stored for a certain period of time. In particular, the toothpaste that has been opened should be used up within one or two months. In addition, the longer a tube of toothpaste is used, the more chances it will be exposed to the air, and the greater the chance it will be exposed to bacteria.
5 should I use one toothpaste for a long time or change it
We should try our best to use toothpaste with different efficacy and brands, so as to give play to the efficacy of different toothpastes in many aspects, so as to maintain oral health.
6 when brushing teeth, is the more toothpaste the better
Dr. E. Jane Crocker, President of the Massachusetts dental health association in the United States, pointed out that, unlike the advertisement, the toothbrush is filled with toothpaste, and the effect of brushing is not much different from that of squeezing half of the toothpaste. Using a small amount of toothpaste each time can also remove tooth stains, especially fluoride toothpaste. Squeeze out pea sized toothpaste every time, which can also extend the service life of the toothbrush.
7 can teeth be healthy after choosing a good toothpaste
In fact, if you brush your teeth improperly, the best toothpaste and toothbrush are useless. The correct way to brush teeth is to keep a 45 degree angle between the toothbrush and the teeth, so that the bristles can more easily clean the teeth and gums; It is better to draw a circle brush; Brush your teeth for at least 2 minutes each time.
8 is there any difference between the efficacy of gel toothpaste and paste toothpaste
Some toothpastes are in the form of transparent or translucent color gel, and some are in the form of white paste. Although the taste and texture of gel toothpaste and paste toothpaste are very different, the cleaning effect is the same.
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