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Understanding dental crowns & bridges
A crown, often called a cap, is a custom-made covering that fits over a tooth. It is commonly used to protect a tooth after root canal treatment, or to restore a tooth that is heavily filled, cracked or worn. Crowns can be made from metal-ceramic, all-ceramic or other materials.
A bridge replaces one or more missing teeth by joining an artificial tooth to crowns on the teeth either side of the gap. Those supporting teeth need to be shaped to hold the bridge, so your dentist will check that they are strong enough.
When someone may need it
- A tooth has had root canal treatment, especially a back tooth
- A tooth is cracked, broken or heavily filled
- A tooth is badly worn or discoloured
- You have a gap from a missing tooth and the neighbouring teeth are suitable
- An existing crown or bridge is damaged or loose
What to expect
Crowns and bridges usually take at least two visits. At the first, the tooth is shaped under local anaesthetic and an impression or scan is taken. A temporary crown or bridge is often placed to protect the tooth.
At the next visit, the final crown or bridge is checked for fit, colour and bite before it is cemented in place. It may take a few days to get used to the new feel.
The treatment process
- 1
Assessment
Your dentist checks the tooth or gap, may take X-rays, and discusses material options.
- 2
Preparation
Under local anaesthetic, the tooth is shaped to make room for the crown or bridge.
- 3
Impressions and temporary
Impressions or a scan are taken, and a temporary is placed while the final piece is made.
- 4
Fitting
The final crown or bridge is checked, adjusted and cemented in place.
Potential benefits & limitations
Potential benefits
- Helps protect weakened teeth from breaking
- Restores chewing and the shape of the tooth
- Can improve the appearance of a damaged or discoloured tooth
- A bridge offers a fixed way to fill a gap
Things to consider
- Some natural tooth structure has to be removed
- Usually needs more than one visit
- Teeth may feel sensitive for a short time after preparation
- Bridges rely on neighbouring teeth, which must be kept very clean
General aftercare
- Avoid sticky or very hard foods while you have a temporary crown
- Brush and clean between your teeth daily, including under a bridge
- Use floss threaders or interdental brushes to clean under a bridge if advised
- Contact the clinic if your bite feels high or the crown feels loose
- Follow the specific instructions your dentist gives you
Frequently asked questions
What is the difference between a crown and a bridge?
A crown covers a single existing tooth. A bridge replaces a missing tooth by attaching it to crowns on the neighbouring teeth.
Will the crown match my other teeth?
Tooth-coloured crowns are shade-matched to your teeth as closely as possible. Your dentist will discuss material options and what to expect.
Can a crowned tooth still get decay?
Yes. The edge where the crown meets the tooth can still decay, so daily cleaning and regular checkups remain important.