Tip: a mouth of Bacteria

◇ Xin yusi (www.xys.org) (xys7.dxiong.com) (xys.ebookdiy.com) (xys2.dropin.org) ◇ a mouth of bacteria · Fang zhouzi · accidentally saw a toothpaste factory in China selling "Chinese medicine antibacterial toothpaste" advertisement, it is said that it can effectively remove 99% of harmful oral bacteria, and its "antibacterial maintenance toothbrush" advertisement, claims that "the industry's first antibacterial brush hair, can inhibit 99% common bacteria ". If the two are used together, the harmful bacteria and common bacteria in the mouth and teeth will be wiped out. This can cater to the consumer's psychology. The average person thinks that we need to brush our teeth two or three times a day to clean the teeth and remove the odor. Isn't it just to eliminate bacteria in the mouth and teeth? Have you ever thought about the number of bacteria in your mouth? It can be predicted that there are as many as 25000 bacteria in a healthy population through gene sequencing. These bacteria are distributed in saliva, oral mucosa, tongue, teeth, and other places, and their species are also different. For example, the tooth is different from other places. The surface is smooth, and only a small portion of bacteria in the mouth can grow there. Even so, up to one thousand bacteria can be detected on the tooth surface. But don't worry. Most of these bacteria are harmless or even friendly to people, but only a few are harmful. For example, the main harmful bacteria that cause dental caries are the Streptococcus Aureus and lactobacillus, and the main causes of epytis are the middle bacteria of the family, and the single bacterial host of the gum. Under normal circumstances, the number of these harmful bacteria is already very small, almost none, no need to rely on "special effects" toothpaste, toothbrush to suppress. Why are there so many kinds of bacteria in the mouth harmful to bacteria? The oral cavity is an excellent bacterial incubator. It is the main opening of the human body, where external bacteria come in through air, dust, and food and survive. Air can provide oxygen for oxygen-like bacteria, but some bacteria are anaerobic. It doesn't matter. These bacteria can also find places to hide without being exposed to the air. Saliva continuously moistens the mouth and keeps its temperature between 35 and 35 ~ 36 degrees Celsius, pH kept at 6.75 ~ 7.25, which is the best growth temperature and pH for many bacteria. Amino acids and proteins in saliva can be used as nutrients for bacteria. Of course, food residues are also their nutrients. The major impact of food residues on teeth is the sugar in the teeth. They are decomposed by bacteria and become lactic acid and other acidic substances. In acidic conditions (pH less than 5.5), the teeth will "de-mine"-the enamel surface of calcium and phosphorus loss. However, the saliva will neutralize the acid, and the calcium and phosphorus in the saliva will be deposited back on the tooth surface. Under normal circumstances, the tooth removal and re-mineralization are in a balance. Fluoride can enhance the re-mineralization of teeth, which is why toothpaste should be fluoride and tap water often fluoride. Bacteria need to breed on their teeth. First, they need to attach them to the surface of their teeth. This also depends on the help of saliva. There are no bacteria on the surface of a newly-grown or just-cleaned tooth, and the saliva flows through, leaving a membrane consisting of a GP on the surface of the tooth, so that the bacteria can stick to it. Bacteria can attach to each other, and even different types of bacteria can stick together. In this way, the layer-by-layer bacteria stick to the surface of the teeth, forming a pale yellow biofilm, that is, tooth spot. The first harm of tooth spot is that it destroys the balance between tooth de-mining and re-mineralization. Because saliva does not penetrate in, it cannot neutralize the acidic substances below the tooth spot. Most bacteria are afraid of acid, but are not afraid of Streptococcus Aureus and Lactobacillus. They can still grow and breed at a pH value of 4.5, making the small environment of tooth spots more and more sour, and tooth Table de-mining will become more and more severe, if there is dental caries, it cannot be recovered. The second harm of plaque is caused by Periodontal Disease. The plaque that grows at the gum joint stimulates the gums and causes inflammatory reactions to increase the secretion of the CIDR fluid. The main component of GCI is the serum, which is rich in protein. For some bacteria, it is a superior nutrient which can digest the protein. The results of protein degradation are opposite to those of sugar degradation, which changes the surrounding environment to alkaline. The acid-base balance maintained by saliva is broken in another direction, and the pH value can exceed 7.5. Most bacteria in the mouth cannot survive in an alkaline environment. The alkali bacteria, such as the middle bacteria of the family, the gum of the host, generate a large number of breeding, resulting in gum inflammation, some people will feel that they are "on fire. The teeth are different from the skin, mucous membrane, and other places. The surface layer of the teeth won't fall off, so the plaque on the top won't fall down on its own. External Force is required. The main function of brushing teeth is to clear teeth spots. Only toothpaste and toothbrush that can be used to remove plaque can effectively remove harmful bacteria. But in some places, the teeth are not flushed by the toothbrush, that is, the teeth between the teeth, and the tooth spots in those places need to be cleared by the floss. If the plaque is not cleared immediately, the minerals in the saliva or CIDR fluid will be deposited on the plaque and gradually make the plaque become mineralization, forming a calculus. Once the calculus is formed, it cannot be removed by brushing your teeth or using floss, but it must be removed by using professional equipment. Chinese people generally do not have the habit of regular tooth washing. They even think that tooth washing will wash their teeth badly and do not dare to wash them. It is difficult to maintain oral hygiene, so it is no wonder that Chinese people will "get angry ". 2012.9.19 (Xinhua Daily Telecom 2012.9.21) (xys20120924) ◇ (www.xys.org) (xys7.dxiong.com) (xys.ebookdiy.com) (xys2.dropin.org) ◇