Children should eat more beans, bean products, vegetables, fish, shrimp and other calcium rich food to provide enough minerals and vitamins, so that the teeth can get normal development.
Milk and dairy products contain a lot of calcium, which can inhibit bacterial acid production and prevent the dissolution of calcium and phosphorus compounds in teeth.
In addition, the immunoglobulin and enzyme contained in milk can inhibit the growth of bacteria in the mouth.
There are fish, shrimp, kelp, jellyfish, tea and mineral water that contain more fluorine. Fluorine can form insoluble fluorapatite with calcium and phosphorus compounds in dentin, so as to prevent the acid produced by bacteria from eroding dentin.
Should eat less processed refined food (such as plum, chocolate, soda, candy, cakes, biscuits, etc.).
In addition, pectin in fruits can inhibit bacteria.
Vegetables contain a lot of trace elements and a lot of vitamin C, and they are also very important anti caries nutrients.
Vegetable fiber can reduce the adhesion of food and the formation of dental plaque by mechanical friction cleaning and stimulating salivary gland secretion.
In addition, vegetable oil can form a hydrophobic layer on the surface of teeth, which can protect teeth and prevent dissolution of dentin.
In fact, shark teeth are specialized scales.
The scales and teeth are homologous organs with the same structure: enamel and dentin, and medullary cavity.
There were also nerves and blood vessels in the medullary cavity.
The important watershed between mammals and their reptile ancestors is not viviparity or lactation, but the differentiation of teeth and the emergence of two teeth. The so-called two teeth means that there are only two sets of teeth in an animal's life, that is, deciduous teeth and permanent teeth.
Mammalian teeth are divided into incisors, canines, premolars and molars.
Because of the differentiation of teeth, the chewing surfaces of upper and lower teeth must be perfectly closed together during chewing. If animals change their teeth all their lives, it is possible to break the closure and affect the chewing function.
The growth of teeth has a certain relationship with bone, but the growth of teeth and bone is not completely parallel due to the different sources of embryos.
The primary teeth were ossified at birth, and the spores of the primary teeth were hidden in the jaw and covered by the gums; the ossification of the permanent teeth began in the neonatal period, and the third permanent molar was ossified at 18-24 months.
The eruption order of deciduous teeth is that the mandible is prior to the maxilla, from front to back, and the deciduous teeth are fully erupted at about 2.5 years old.
The first permanent tooth (first permanent molars, after the second deciduous molars, also known as 6-year-old teeth) erupts around the age of 6; the deciduous teeth are replaced by the same permanent teeth one by one at the age of 6-12, in which the first and second premolars replace the first and second deciduous molars, which is the mixed dentition stage; the second permanent molars erupt at the age of 12; the third permanent molars (wisdom teeth) erupt after the age of 18, and there are also those who do not erupt the third permanent molars all their lives.
The healthy growth of teeth is related to protein, calcium, phosphorus, fluorine, vitamin A, C, D and thyroid hormone.
Chewing food is good for tooth growth.
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