What causes the occurrence of dental caries

Most of the caries are still in the baby's body, there are many parents that sooner or later the teeth will be permanent teeth to replace, so many parents think that suffering from dental caries is irrelevant. Caries on the baby's physical and mental health has a serious harm, and even suffer from life.
Caries is a bacterial disease, so it can be secondary to pulpitis and periapical periodontitis, and even can cause alveolar bone and jaw inflammation. Secondary infection of dental caries can form lesions, resulting in or add arthritis, periostitis, chronic kidney and other systemic diseases.
The currently recognized theory of caries etiology is a quadruple factor theory, mainly including bacteria, oral environment, host and time, the basic points are: caries-eating foods (especially sucrose and refined carbohydrates) in sugar, tightly attached to The surface of the tooth surface formed by the saliva protein is not only firmly attached to the tooth surface in this anatomical structure and biochemical and biophysical characteristics of the tooth surface, but also at a suitable temperature for a sufficient time Plaque deep acid, erosion of teeth, so that demineralization, and thus damage the organic matter, resulting in cavities.
1. bacteria
Is a necessary condition for the occurrence of dental caries, generally believed that there are two types of cariogenic bacteria, one is the production of bacteria, mainly Streptococcus mutans, actinomycetes and Lactobacillus, carbohydrates can cause acid decomposition, resulting in Tooth non-mineral demineralization; the other is the Gram-positive cocci, can damage organic matter, after a long period of time can make teeth forming cavities. Currently recognized the main cariogenic bacteria is Streptococcus mutans, the other also includes actinomycetes, Lactobacillus and so on.
Bacteria are mainly attached to the tooth surface with plaque. Stopped food in the carbohydrate degradation, on the one hand polymerization to produce highly viscous dextran, the formation of plaque matrix, on the other hand acid bleaching teeth, plaque composition is more complex, in addition to a large number of bacteria, Sugar, protein, enzymes and other substances.
2. Oral environment
Oral cavity is the outer environment of the teeth, and the occurrence of caries is closely related to, which play a leading role in food and saliva.
(1) food is mainly carbohydrates, both with the formation of plaque matrix, but also plaque bacteria in the main energy, bacteria can use carbohydrates (especially sucrose) metabolism of acid, and synthesis of extracellular polysaccharides and intracellular polysaccharide , The organic acid produced is conducive to the growth of acid and acid bacteria, but also conducive to the hardening of the hard tissue of the teeth, polysaccharides can promote the adhesion and accumulation of bacteria in the tooth surface, and in the absence of exogenous sugar, to provide energy source. Therefore, carbohydrates are the basis of the caries disease.
(2) saliva in the normal circumstances, the saliva has the following effects:
Mechanical cleaning to reduce the accumulation of bacteria.
Antibacterial effect of direct inhibition or inhibition of plaque attached to the tooth surface.
Antacid effect by the heavy bicarbonate and other substances from the role of neutralization.
Anti-dissolving effect through the calcium, phosphorus, fluoride and other teeth to enhance acid resistance, reduce the solubility.
The amount and quality of saliva fluid changes, can affect the caries rate, clinically visible, dry mouth or saliva secretion in patients with caries rate increased significantly. The maxillofacial radiotherapy may be due to the destruction of the salivary glands and the presence of multiple dental caries. On the other hand, when the amount of lactic acid in the saliva is increased or the bicarbonate content is reduced, it is also beneficial to the occurrence of caries.

3. host
The tooth is the target organ in the process of caries. The shape of the tooth, the degree of mineralization and the structure of the tooth are directly related to the occurrence of caries, such as the fissure of the tooth and the teeth with poor mineralization, and the degree of mineralization The structure of the teeth and the body are closely related, especially in the development, not only affect the development and structure of the teeth, but also on the saliva flow, the amount of fluoride, Flow rate and its composition also has a great impact, and therefore an important part of the occurrence of caries.
Time
Caries disease has a long process, from the initial caries to the clinical formation of cavities generally need 1.5 to 2 years, so even if the cariogenic bacteria, the appropriate environment and susceptible host coexistence, dental caries will not occur immediately, Only the above three factors exist for a long time, it may produce caries, so the time factor in the occurrence of dental caries is of great significance.
More than Xiaobian has been introduced for the reasons leading to the occurrence of dental caries, Xiao Wen warm tips if you find the baby suffering from the disease must be taken seriously, to go to a regular professional hospital diagnosis and positive treatment.