Saliva is the external environment of teeth, which plays the role of buffering, washing, antibacterial and bacteriostatic. A large amount of thin saliva is beneficial to cleaning the tooth surface, reducing the accumulation of bacteria and food residues, and also helping to dilute acidic products. A small amount of thick saliva is easy to stay and promote the formation of dental plaque and stick to the teeth. Reduced saliva secretion or breathing and sleeping at night will also promote the formation of dental plaque. At the same time, the nature and composition of saliva also affect the buffering capacity and the living conditions of bacteria [1].
Saliva is a digestive juice, mostly water, and also contains mucin and amylase. Saliva can not only moisten the mouth, soften food and facilitate swallowing; Amylase can promote the decomposition of starch into maltose and enhance digestion; Saliva can also remove food residues and foreign bodies in the mouth and keep the mouth clean. In addition, saliva also contains lysozyme, which has bactericidal effect. Mucin can protect gastric mucosa and increase its antiseptic effect. So, avoid spitting casually.
Saliva is the saliva secreted by salivary glands around the oral cavity, which has the functions of lubricating oral mucosa, dissolving food and promoting swallowing. It also contains amylase and lysozyme, which can help digestion and have some bactericidal effects. Its main functions are digestion, taste and cleaning, and it has a certain immune protection effect on the local area, but it has no obvious bactericidal effect. Therefore, saliva is a physiological substance secreted by the human body itself.
Saliva is called golden jade liquid in Chinese medicine. Su Wen's theory of meridian differentiation says: "If you drink in the stomach, you will overflow essence;" If you drink in the spleen, your temper will disperse essence; If you drink in the lungs, you will pass through the waterway, and then you will lose in the bladder meridian, and the five internal organs will be parallel. " This means that body fluids pass through the stomach, spleen and lungs and spread to all blood vessels in the whole body. Saliva contains natural anticancer factors. If people have some conditions that can promote the growth of cancer cells, saliva can threaten or even kill cancer cells. Therefore, Chinese medicine has attached great importance to saliva health care since ancient times, which is the reason. As the saying goes, "If you swallow 300 mouthfuls of saliva every day, you can live to be 99 years old." Saliva has such a function, as long as people make it according to law every day and persevere, they can always protect Kangmeili.
Function of saliva
1. Moisturize the mouth and food to facilitate speaking and swallowing;
2. Constantly remove food particles from taste buds, so that you can constantly taste the taste of food;
3. Clean and protect the oral cavity;
4. Antibacterial effect;
saliva
5. Convert starch in food into maltose.
Advantages of saliva: it contains carbonate, phosphate and protein, which can bring chemical protection to teeth; Amylase contained in it can help digestion; The ingredients can fight bacteria; Can clean the mouth; Cancer and AIDS can be detected by detecting saliva.
Disadvantages of saliva: saliva can also spread diseases through people with germs.