How dentists diagnose and treat cavities at each stage
Cavity treatment is based on whether the tooth surface is intact, how deeply decay extends and whether the pulp and surrounding tissues are affected. Early mineral loss may be managed without drilling, while a structural hole usually requires removal of damaged tissue and restoration of the tooth.
What happens during diagnosis
The dentist asks about triggers, duration and severity, then examines the tooth under good lighting and checks nearby gums and restorations. Testing may include tapping the tooth, assessing biting discomfort, applying cold or checking pulp response.
Bitewing X-rays commonly help identify decay between back teeth and beneath restorations. Not every early lesion is visible on an image, and X-rays can underestimate the true depth, so findings are interpreted alongside the clinical examination and your risk history.
- Symptom and medical history
- Visual and tactile assessment
- Pulp or bite testing when symptoms suggest deeper involvement
- Dental X-rays when the expected benefit justifies them
Treatment for early, non-cavitated decay
If enamel has lost minerals but has not collapsed, treatment may focus on arresting the process. Options can include fluoride varnish, prescription-strength fluoride for selected patients, improved daily cleaning and fewer sugar or refined-carbohydrate exposures between meals.
Some lesions can be sealed or treated with resin infiltration depending on location and progression. Monitoring only makes sense when follow-up is reliable and the causes of decay are being controlled.
Silver diamine fluoride
Silver diamine fluoride may arrest certain cavities, particularly when conventional treatment is difficult or must be delayed. It permanently darkens treated decay and does not rebuild missing tooth structure, so its appearance and limitations should be discussed beforehand.
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Fillings, crowns and pulp treatment
A cavitated tooth is commonly treated by removing irreversibly damaged material and placing a filling. The restorative material and design depend on the tooth's location, remaining structure, moisture control, bite forces, appearance and cost.
A crown or other indirect restoration may be recommended when a large portion of the tooth is weakened. If the pulp is irreversibly inflamed or infected, root canal treatment may preserve the tooth; extraction may be considered when the tooth cannot be predictably restored.
- Small to moderate structural defect: filling
- Extensive weakness or fractured cusps: crown or other coverage restoration
- Irreversible pulp damage: root canal treatment followed by restoration
- Non-restorable tooth: extraction and discussion of replacement options
Safe symptom control while waiting
Keep the area clean with gentle brushing and interdental cleaning, and rinse with warm salt water if the gum is irritated. Temporary filling material sold for lost fillings may protect a small opening for a short period, but it should not be forced into a painful or swollen area.
Use nonprescription pain medication only according to its label and your clinician's advice. People with certain medical conditions, medication interactions, pregnancy or allergies may need to avoid common pain relievers, and children should never receive aspirin unless specifically directed by a clinician.
- Do not put aspirin against the tooth or gum; it can burn tissue
- Do not rely on leftover antibiotics
- Do not apply heat to facial swelling
- Escalate care if pain, fever or swelling worsens
Frequently Asked Questions
No. Antibiotics do not remove decayed structure or seal a tooth. They are reserved for selected infections, especially when there are signs of spread or systemic illness, and definitive dental treatment is still needed.
Local anesthetic is generally used when treatment would otherwise be uncomfortable. Pressure and vibration may still be noticeable, and temporary sensitivity afterward can occur; severe or worsening pain should be reported.
The decision considers whether the surface has broken down, lesion depth and activity, X-ray changes, cleaning access, cavity risk and the likelihood of reliable follow-up.