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 Fang Xiao

Dentistry

52sec

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Can cavities be detected in an X-ray?

In clinical practice, not all cavities require X-rays, nor can all cavities be detected through X-rays. The purpose of taking X-rays is to understand the depth of the cavity and the distance between the cavity and the dental nerve. Some cavities occur on the surfaces between teeth which cannot be seen with the naked eye; in these cases, X-rays can provide a clear diagnosis. However, early-stage cavities only involve changes in the enamel, showing as chalky changes or small black dots and lines on the tooth surface. For these superficial changes, X-rays will not show any abnormalities. Therefore, it is important to maintain oral hygiene by brushing teeth morning and evening, and rinsing after meals to detect and treat cavities early, to prevent other complications.

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Written by Li Bao Hua

Dentistry

55sec

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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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Written by Fang Xiao

Dentistry

1min 17sec

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If the cavity doesn't hurt, does that mean it hasn't reached the nerve?

It is necessary to make judgments based on the patient's symptoms and examination results. Dental caries refers to the chronic, progressive, destructive disease occurring in the hard tissues of the teeth under the influence of various factors such as plaque bacteria. Whether dental caries is painless or has reached the nerve, the simplest clinical method is to judge based on the patient's symptoms, asking whether the patient experiences pain. In the early stages, there are only changes in the color and texture of the tooth, which do not cause pain. In the later stages of the disease, due to necrosis of the dental pulp, pain may not occur. At this time, diagnosis can be assisted by dental films; an X-ray can show the low-density shadow produced by the caries, and whether this low-density area significantly erodes into the dental pulp, which is also an auxiliary diagnostic method. Therefore, it is important to maintain oral hygiene, brush teeth morning and evening, and rinse mouth after meals.

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Written by Li Bao Hua

Dentistry

1min 10sec

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The causes of dental caries formation

The causes of dental caries include bacterial factors, dietary factors, the tooth's own factors, and time factors, also known as the four-factor theory of dental caries. Dental caries initially result from bacterial infection. Under such infections, the hard tissues of the tooth undergo a chronic destructive deterioration; over time, this results in cavity formation. That is to say, the formation of dental caries primarily occurs under bacterial infection. Additionally, diet is a main cause of dental caries, especially sugary foods. Bacteria use glucose to produce acid, leading to tooth demineralization and cavity formation. Moreover, congenital calcium deficiency in teeth, leading to incomplete enamel development, is also an important cause of dental caries. Furthermore, the formation of dental caries requires a certain time factor.

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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.)