Tooth decay: signs, stages and treatment options

Tooth decay develops when acids produced by plaque bacteria cause the tooth to lose minerals. It may be painless at first. Treatment depends on how far the damage has progressed and whether the tooth can be restored; a dental assessment is needed to decide [1] [2].

Key points

• A stain or sensitive tooth is not a diagnosis of decay
• An early enamel change differs from a cavity where tooth structure has been lost
• Frequent sugary snacks and drinks can increase risk

What might you notice?

Possible signs include a white or dark mark, a hole that traps food, or sensitivity to sweet, hot or cold foods. Decay between teeth may be difficult to see. Deeper damage can affect the dentine and pulp, causing pain or infection. Your dentist will assess whether the change is active decay, a stain or another problem, and whether an X-ray is justified [2].

How do the treatment options differ?

Early changes without a cavity may be managed with an individual prevention plan, including fluoride and changes to cleaning and sugar intake. A cavity does not regrow missing tooth structure and may need a restoration. If the pulp is affected, root canal treatment may be considered. Extraction may be discussed when the tooth cannot be maintained. These are possible options, not a sequence every patient must follow [1] [3].

What can you do between visits?

Think about how often you have sugary drinks or snacks throughout the day. Brush with fluoride toothpaste and clean between your teeth using an appropriate tool. Tell your dentist about dry mouth, medicines and previous decay. Ask which areas need monitoring and how your prevention plan will be reviewed. Do not try to drill or scrape out a cavity yourself.

When should you seek care?

Arrange an assessment for persistent pain, a cavity or a broken filling. Pain with swelling, fever or an unusual taste needs prompt advice. Difficulty breathing or swallowing, or swelling near the eye or neck, requires emergency care rather than waiting for a routine appointment [4].

Common questions

Is every dark spot decay?

No. Staining and old restorations may look dark too. An examination helps distinguish them.

Can brushing reverse a cavity?

Daily care may help control an early mineral change, but it cannot replace tooth structure that has already been lost.

Does no pain mean no decay?

No. Risk-based check-ups can identify problems before they cause symptoms.