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Dental Fillings: Types, the Procedure and Aftercare
Need a filling? Learn how a cavity is filled, the difference between tooth-coloured and other fillings, how long fillings last and how to care for them.
Quick answer
A filling repairs a tooth damaged by decay or a small fracture. The dentist numbs the tooth, removes the decay, and fills the space, commonly with a tooth-coloured composite material that is hardened with a blue light. The procedure usually takes 20 to 60 minutes. Mild sensitivity for a few days is normal; see your dentist if your bite feels high or pain gets worse.
In this article
Fillings are one of the most common dental treatments. They stop decay from spreading and restore the tooth's shape and strength.
When do you need a filling?
- A cavity caused by tooth decay
- A small chip or crack
- Wear on the biting surface or near the gum line
- Replacing an old, broken or leaking filling
Types of filling
| Type | Notes |
|---|---|
| Composite (tooth-coloured) | Matches tooth colour; bonded to the tooth; common for front and back teeth |
| Glass ionomer | Releases fluoride; often used near the gum line and in children's teeth |
| Amalgam (silver) | Very durable; now used less often, and its use is being phased down internationally |
Your dentist will recommend the best option for the size and position of the cavity.
What happens during a filling
- The tooth is numbed with a local anaesthetic.
- Decay is removed and the cavity is cleaned and shaped.
- The filling material is placed in layers and hardened with a curing light.
- The filling is shaped and polished, and your bite is checked.
Aftercare
- Avoid chewing on the numb side until feeling returns, so you don't bite your cheek or tongue.
- Mild sensitivity to cold or biting for a few days is normal.
- Brush and clean between teeth as usual.
When to call the dentist
- Your bite feels high or uneven after the numbness wears off
- Pain gets worse or lasts more than a couple of weeks
- The filling feels loose or breaks
How long do fillings last?
It varies with the material, the size of the filling, your bite and your oral hygiene. Many last for years. Regular check-ups allow your dentist to spot worn fillings early.
Frequently asked questions
Does getting a filling hurt?
The tooth is numbed, so you should feel pressure and vibration but not pain.
Can I eat after a filling?
You can usually eat once the numbness has worn off. Composite fillings are hard as soon as they are set with the light.