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
1min 10sec home-news-image

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 Li Bao Hua
Dentistry
1min 5sec home-news-image

Cavities that do not hurt still require root canal treatment.

Cavities that do not hurt may or may not require root canal treatment, depending on the extent of the decay. If the cavity has not reached the dental nerves, there will not be noticeable pain. In such cases, since the decay is relatively superficial, direct filling, or dental restoration can be performed without the need for root canal treatment. If the cavity is severe and has reached the dental nerves, causing the nerves to become necrotic and purulent, there will be no pain due to the loss of sensory function from nerve death. In these situations, root canal treatment is needed. This involves removing the infected dental nerves, followed by medicinal treatment of the root canal, and after the inflammation is controlled, filling of the root canal is performed. In other words, a painless cavity might actually be caused by necrosis and pus formation in the dental nerves, requiring root canal treatment.

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Written by Wang Ji Zhong
Internal Medicine
41sec home-news-image

What is the reason for black dental caries?

Cavity prevalence is quite high, especially in children who haven't developed good oral hygiene habits and consume a lot of sweets, making them prone to cavities. Early detection is thus very important. Early symptoms of cavities are not obvious, but with careful observation, one can notice parts of the teeth turning black. This is due to bacterial erosion and damage to the teeth. Damage occurs to the enamel and dentin of the teeth. If this continues to develop, it can lead to damage to the dental pulp, resulting in pulpitis. Therefore, when you notice your teeth turning black, it is crucial to seek timely treatment to prevent the progression to pulpitis.

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Written by Li Cui
Dentistry
1min 1sec home-news-image

Does removing a cavity-affected tooth have any impact?

Cavities, also commonly referred to as tooth decay, can impact daily life depending on the situation. Generally, if the cavity is not severe, extraction is not necessary, and treatment should be attempted if possible. However, extraction can be harmful, as it creates a gap. The teeth adjacent to this gap can be affected, leading to tilting towards the gap or becoming loose, which may impact how the teeth come together when biting. The body has a protective mechanism that can automatically close this space, but although this closes the gap, it may destabilize the overall bite alignment and function, potentially affecting the temporomandibular joint function. Therefore, if tooth decay occurs, it is advised to seek prompt treatment at a formal dental hospital or a major hospital’s dental pulp department, where the decayed and necrotic tissue can be removed and the cavity filled to restore the shape of the tooth crown and some of the biting function.

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Written by Li Bao Hua
Dentistry
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Will children's cavities grow new teeth?

Children's cavities can also regrow new teeth. Cavities, also known as dental caries, refer to the destruction of hard dental tissues under a bacterial infection. It is crucial to treat children's cavities early, otherwise, they may affect the underlying new teeth. If the cavity reaches the level of periapical inflammation, meaning the dental pulp tissues become pus-filled or necrotic, and gum abscesses appear, it could cause the newly emerged teeth to develop caries. Sometimes, it may also lead to abnormal eruption pathways of the new teeth, such as abnormal eruptions on the lip side or cheek side, resulting in misaligned teeth, which can impact the arrangement of the child’s primary or permanent teeth.