Dental caries is a disease in which the hard tissues of teeth are destroyed. The method of tooth decay is the result of the interaction between bacteria, factors, teeth and saliva, and it is a dental disease caused by many factors.
Types of cariogenic bacteria
There are very many kinds of bacteria that can cause dental caries, mainly certain streptococci and lactobacilli. Bacteria, mucin in saliva and food residues mix together and adhere firmly to the tooth surface, forming plaque. Due to the acid-producing effect of bacteria, the surface of tooth enamel under the plaque is eroded by acid, and finally decalcifies, dissolves, and forms cavities - cavities.
The influence of diet on tooth decay
Among many foods, sugary food has a close relationship with the occurrence of caries, and the food containing sucrose can be used by bacteria to produce acid by fermentation, and the acid produced can stay on the interface between plaque and enamel for a long time to cause caries.
Saliva's effect on tooth decay
The saliva in large quantity and thin can wash the surface of teeth and reduce the accumulation of bacteria and food residue, while the saliva in small quantity and thick can easily stay and encourage the formation of plaque on the surface of teeth, which provides the basic condition for the formation of dental caries.
The relationship between tooth itself and caries
The occurrence of dental caries is related to the quality of the tooth itself, and a well-treated tooth has strong anti-carious ability (anti-acid ability and anti-bacterial adhesion ability).
The relationship between dental properties and caries
Well arranged and smooth surface teeth, well structured and mineralized teeth have strong cleaning ability and can improve the effect of anti-caries. But if the teeth with poor development and mineralization, teeth with poorly organized sockets are easy to decay and the caries progresses faster, and their anti-caries ability is poor.
The reason of children's good caries
Children's milk teeth are weaker than permanent pressure hard tissue, and the calcification degree is also low, so the newly grown teeth of children are easily eroded by acid and form caries. In addition, children like to eat sugar and snacks, and they do not have the good habits of rinsing their mouth after meals and brushing their teeth in the morning and evening, so the incidence of children's caries is higher.
