If a cavity is not thoroughly cleaned before being filled, what will happen?

Written by Li Cui

Dentistry

Updated on April 08, 2025

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When a patient has severe dental caries and undergoes filling, if the decay is not completely removed before filling, it may lead to reinfection and residual decay, continuing to cause inflammation. Therefore, it is recommended that the decay be completely removed before filling. In such cases, it is generally safe for patients to seek treatment at a formal dental hospital. Official hospitals adhere to strict standards, effectively cleaning the affected area for filling and repair. Therefore, patients need not be overly anxious; this type of procedure is quite common in dentistry. Patients are advised to maintain good oral hygiene in daily life and seek timely medical attention when dental caries occur.

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Written by Li Bao Hua

Dentistry

48sec

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How to deal with toothache from cavities?

Cavity toothache occurs when bacteria infect the hard tissue of the tooth, approaching or reaching the dental nerve, causing a pain response from the nerve, which is also a self-protective reaction. Initial treatment for cavity toothache involves using a drill to remove the decayed hard tissue of the tooth. If the decay is completely removed and the dental nerve is not exposed, this condition can be directly treated by filling or using a pulp-capping agent to protect the nerve before filling. If, after removing the decay, the dental nerve is exposed or reached, the situation cannot be resolved with a direct and immediate filling. Instead, nerve-killing procedures are necessary, which involve root canal treatment of the tooth.

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Written by Li Bao Hua

Dentistry

44sec

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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.

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Written by Li Bao Hua

Dentistry

1min

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How to perform pulp drainage for dental caries?

Pulpotomy and drainage for caries involve a treatment method for acute pulpitis or apical periodontitis caused by infected dental nerves. Teeth are composed of enamel, dentin, cementum, and pulp tissue. The pulp tissue, also known as the dental nerve, is located within the innermost part of the tooth, surrounded by the hard layers of dentin and cementum. Therefore, once the dental nerve becomes inflamed, the pressure within the pulp chamber rapidly increases. To alleviate the pain, it is necessary to release this pressure, namely by performing a pulpotomy and drainage. This can be done by drilling to remove some of the infected dental tissues, and then opening up the pulp chamber to relieve the pressure, significantly reducing the pain. If the dental nerve is completely purulent and necrotic, the top of the pulp chamber can be removed, followed by thorough pulpotomy and drainage.

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Written by Li Bao Hua

Dentistry

53sec

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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.

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Written by Li Cui

Dentistry

56sec

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What to do if you have tooth decay and swollen, painful gums?

When patients experience dental caries and swollen, painful gums, it is advised that they seek medical attention promptly. They may take some anti-inflammatory and analgesic medications to relieve inflammation and pain. After the inflammation has completely subsided, treatment should be based on the extent of damage to the dental caries. If the damage to the dental caries is minor, conservative treatment may be sufficient. However, if the damage is severe, it may affect part of the tooth structure or even the entire tooth and root, possibly leading to cavitation. In such cases, it is recommended that patients consider tooth extraction or filling as remedial measures. Additionally, patients must pay attention to oral hygiene and develop correct tooth brushing habits. (The use of medications should be under the guidance of a professional doctor.)