Advertisements for whitening toothpaste appear frequently on TV, so can whitening toothpaste really whiten your teeth? How much force should be used in brushing teeth for dental care? In the choice of toothpaste which is most favorable to dental health? Is there really a difference between the soft and hard bristles of a toothbrush? Today to give you a lesson in dental health. Everyone brushes their teeth, but not everyone brushes their teeth effectively. Proper brushing to protect your oral health, and before that, you need to learn to choose a suitable toothbrush, and with the right toothpaste, and even with the right amount of water. First, whitening toothpaste can really whiten teeth? The role of whitening toothpaste in the end is to keep the mouth clean, and its whitening effect is due to the addition of special friction agents. However, it is only useful for mild tooth discoloration caused by smoking, drinking coffee, etc., i.e., individual people, while it is basically ineffective for deep staining such as tetracycline teeth and fluorosis. Toothpaste manufacturers will find relevant medical organizations to conduct whitening comparison tests to confirm the efficacy of their products before the toothpaste is put on the market. However, when manufacturers publish the results, often cleverly avoid the test is not suitable for the use of the situation of the population, so it is easy to mislead consumers, thinking that everyone applies. Therefore, after using whitening toothpaste for 1 week, if there is no significant change in tooth stains, it is best to stop using it. To keep your teeth clean and white for a long time, brushing is a proven method. Always make sure to brush your teeth 3 times a day and in the right way. Any toothpaste can not completely eliminate tooth discoloration, can only play a health care, prevention or improve the role of “yellow teeth”. In addition, if you have a habit of drinking coffee, colored beverages, it is best to rinse your mouth with water in a timely manner, to reduce the chance of pigmentation, and regularly go to the hospital to wash your teeth, see a dentist, in the absence of a clear reason for the discoloration of the teeth, don’t blindly believe in the so-called magical effect of whitening toothpaste. Second, how to brush teeth correctly? There are many ways to brush your teeth correctly, and each person can choose a method according to their own conditions. Here are a few commonly used brushing methods: Horizontal trembling method: also known as the Bass brushing method. Horizontal trembling method with short trembling horizontal brushing action is the most clean plaque, so it is also known as the groove brushing method. Place the tip of the bristles and teeth gingival surface at an angle of 45 ° and mild pressure, the tip of the bristles partly into the gingival sulcus, and partly outside the sulcus, and then for the front and back to the trembling of 6 to 8 times, trembling bristles move only 1 mm. Brush the upper and lower anterior teeth of the lingual palate, such as the narrow arch, can be the head of the brush vertical for a short horizontal brushing trembling. At the same time, it should also be pulled to brush the occlusal surface of the posterior teeth and clean the fossa of the occlusal surface. Rotary brushing method: also called Roll brushing or vertical brushing method. Bristles and tooth surface into 45 ° bristle head pointing to the gums, and gingiva gently contact, and then to the crown of the direction of rotation, the speed should not be too fast, so that repeat 8 10 times, and gradually in the lip (cheek) surface of each tooth and the tongue surface to move. When brushing the occlusal surface, the bristles are placed on the occlusal surface and moved back and forth. This method has the effect of massaging the gums, improving local blood circulation and promoting epithelial keratinization, which helps to enhance the defensive ability of periodontal tissues. Physiological brushing method: the bristles are in contact with the crown of the tooth, the head of the bristles pointing to the crown of the tooth, along the tooth to the gingiva lightly brush. Brush each surface of each tooth in turn. This method can not only clean the tooth surface, but also massage the gums. Selection of toothbrushes: health care toothbrushes should be used, characterized by soft bristles, brush surface flat brush head is not large, the tip of the bristles rounded, both effective in eliminating plaque, but not damage to teeth and gums. The toothbrush handle and bristles should be vertical or nearly vertical. The tips of the bristles should be rounded to avoid damaging the gums. Choose a toothbrush with two to three rows of bristles, spaced at the same interval, and with a length of about seven-sixteenths of an inch. Frequency and time of brushing: You must brush your teeth and rinse your mouth in the morning and evening. If possible, brush your teeth immediately after each meal. Brushing time is not less than 3 minutes. It is most important to brush your teeth before going to bed, because after falling asleep, saliva secretion will be reduced, and saliva can wash away bacteria and inhibit bacterial reproduction. If you do not brush your teeth before going to bed or did not brush clean, food debris in the role of bacteria will soon be fermented acid, coupled with the mouth due to sleep and the lack of saliva, can not dilute and neutralize the acid produced by bacteria, the teeth are very easy to be corroded, day long may cause tooth decay. So brush your teeth before going to bed, brush the food debris left on the teeth and tooth surface clean, and no longer eat anything after brushing, you can maintain oral hygiene overnight. Maintenance and replacement of toothbrushes: After each brushing, the toothbrush should be washed and put into a cup with the head facing upwards, and placed in a ventilated dry place. Every 1-3 months should be replaced with a new toothbrush, such as found that the bristles scattered curved, tilted should be replaced in a timely manner.