Why do my teeth smell bad?

There are many reasons for bad teeth, such as improper oral hygiene, or tooth decay. Food is stuck in the teeth for a long time and is not easy to clean out. Over time, the stuck food will become smelly. The causes of tooth decay mainly include several aspects, diet, bacterial growth, dental health and saliva, etc. You must pay attention to oral hygiene, improve bad habits, and develop a good habit of brushing your teeth in the morning and evening.

Question 1

1. Bacteria

During the occurrence and development of dental caries, bacteria play a leading role in the onset of dental caries. Therefore, in recent years, it has been internationally recognized that dental caries is a bacterial disease. There are many types of bacteria that cause dental caries, the most important of which are certain mutans streptococci and lactobacilli. These bacteria mix with mucin and food debris in saliva and adhere firmly to the tooth surface and pits and fissures. This adhesive substance is called dental plaque. The large number of bacteria in the plaque produce acid, causing the enamel surface under the plaque to decalcify and dissolve. Clinical investigations have shown that children with more plaque in their mouths tend to have more dental caries.

2. Diet

Diet is an important factor for bacteria in the formation of dental caries. Food contains a large amount of carbohydrates and sugars, which not only provide energy for the life and activity of bacteria in plaque, but also produce organic acids through bacterial metabolism. The acids remain on the tooth surface and in pits and fissures for a long time, causing demineralization and destruction of enamel. Subsequently, some bacteria dissolve proteins to form cavities. There are many caries-causing sugars, the most important of which is sucrose.

During the period of tooth development, nutrition determines the biochemical structure of tooth tissue, and well-calcified teeth have high caries resistance. If the food contains insufficient mineral salts, main vitamins and trace elements, such as calcium, phosphorus, vitamin B1, D and fluoride, the teeth's resistance to caries will be low, creating the conditions for the onset of caries. Deciduous teeth occur, develop and calcify during the fetal period. Although the mother's nutrition during the lactation period does not have a decisive influence on the development of fetal deciduous teeth, strengthening maternal nutrition is still beneficial to the calcification of deciduous teeth. Unless the mother suffers from severe metabolic disorders or genetic diseases, deciduous teeth are generally not seriously affected.