How to Prevent and Care for Dental Caries

Written by Wang Ji Zhong
Internal Medicine
Updated on May 27, 2025
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Cavities have a high incidence rate, especially during childhood. If oral care is neglected, dental decay can occur, thus the prevention of cavities is very important. The main cause of cavities is dental plaque, which necessitates good oral hygiene. It is essential to develop the habit of brushing teeth daily with the correct technique. It is important to start teaching children to brush their teeth after they turn three, striving to brush once in the morning and once at night, rinse after meals, and particularly brush before bedtime. It is also advisable to reduce the consumption of sugary foods. Currently, the best prevention method is to apply a dental sealant, which is a protective coating on the teeth to shield them from bacterial erosion. If decay occurs, it is crucial to seek immediate treatment at a hospital to repair the damaged dental tissue and restore health.

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Written by Fang Xiao
Dentistry
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Will cavities improve after changing teeth?

Cavities in baby teeth can heal when they are replaced by permanent teeth, but cavities in baby teeth still need to be treated. Because the decay can deepen, leading to premature loss of the tooth, which can affect the development of the permanent teeth. Severe cavities can lead to abnormal development of the permanent teeth, and even after the child's teeth are replaced, the new teeth may not be in good condition. For example, if the root of a baby tooth becomes inflamed and the inflammation is not treated and cleared, the alveolar bone around the tooth root can also become inflamed. Below the alveolar bone is the germ of the new tooth, and prolonged inflammatory stimulation can affect the germ of the permanent tooth. Additionally, premature loss of baby teeth can lead to the loss of adjacency between teeth, which can affect the growth and development of permanent teeth. Therefore, it is important to detect and treat cavities in baby teeth early, and ideally perform pit and fissure sealants before cavities form.

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Written by Yao Li Qin
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What are the treatment methods for children's dental caries?

If children have dental caries, it is crucial to treat them actively, even if the caries are on primary teeth, timely repair is necessary. Once a child's teeth begin to erupt, it is important to start brushing their teeth and maintaining good oral hygiene. If caries have already developed, take the child to a pediatric dental clinic for tooth repair. This is especially true for the back molars, which, even though they may be replaced at the age of six, still need to be repaired throughout the process. Otherwise, it will affect the eruption and alignment of the permanent teeth later on. Therefore, if children develop dental caries, it is essential to visit a hospital as soon as possible for dental treatment, and once all the molars are in place, fissure sealants should be applied.

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Written by Li Bao Hua
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Can a cavity wait a month?

Cavities should be filled as soon as possible, through a treatment known as filling, and it is best not to delay. If a cavity could have been simply filled within a month, it might further become infected, causing inflammation of the dental nerve and leading to conditions such as pulpitis or apical periodontitis. Direct filling won't be possible; the tooth will need treatment before it can be filled. Cavities are a type of hard tissue decay caused by bacterial infection. If it's an adult's cavity, the progression is relatively slow and may only advance partially within a month, not reaching the dental nerve. However, in children, cavity progression is very rapid; if not promptly treated, severe dental nerve pain could occur within a month, necessitating further dental treatments.

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The difference between dental caries and tooth decay.

Cavities, also known as dental caries, are essentially the same thing. Cavities are a disease caused by bacterial infection of the hard tissues of the teeth, resulting in black holes on the tooth surface. If the cavity is deep, reaching or approaching the dental nerve, external stimuli from hot, cold, sweet, or sour sources can cause tooth pain. The term "tooth decay," commonly referred to as "worm teeth" by the public, fundamentally describes the same condition as cavities, not caused by any sort of worm but by bacterial pathogens. Thus, there is no difference between cavities and tooth decay; both are infectious diseases of the hard tissues of the teeth.

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Can tooth decay be cured?

Cavities are a type of destructive dental hard tissue disease caused by bacterial infections and are also a chronic progressive infectious disease. Cavities can only improve through early and effective intervention and treatment; otherwise, the condition may develop further, leading to pulpitis or apical periodontitis. Severe cases can also cause systemic symptoms such as space infections, and some may lead to bacteremia or sepsis. In the early stages of development, cavities have no clinical symptoms. At this stage, filling the cavity is painless. If the decay progresses to reach or approach the dental nerve, filling the cavity can then cause widespread pain. If it reaches the dental nerve, it cannot be directly filled in one go; it requires dental treatment for improvement.