So what are crowns for teeth, exactly? Some people call them caps. Some call them crowns. Nobody says whether those are two different things or one thing under two names.
If you have been told you need crowns for teeth that are cracked, worn or heavily filled, it helps to know what you are agreeing to first. This guide covers what a crown is, the materials used, when a dentist recommends one, how long they last and how to look after yours.
What Are Crowns for Teeth (& Tooth Caps)?
A crown is a custom-made cover that sits over a damaged tooth, replacing its outer surface while the natural root stays in place underneath. Dentists use one when a tooth is too weak, cracked or heavily filled to survive on its own. It restores the tooth’s shape, strength and appearance in a single piece. Once it is cemented, it works like a normal tooth.
Crown or Cap: Is There a Difference?
There’s no clinical difference. “Cap” is the everyday word people reach for, because that’s what it looks like: a cover that fits over the top. Your dentist will say crown, your neighbour will say tooth cap. Both describe the same restoration. So if you have been searching for what tooth caps are, or what caps for teeth do, you have found the answer.
What Are Crowns on Teeth Fitted Over?
Crowns on teeth wrap the visible part of the tooth above the gum, not the root. Your dentist will reshape the natural tooth slightly so the crown sits over it without feeling bulky, then take a scan or impression. The crown is made to fit that shape. The join then sits at or just below the gum line, so it stays hidden.
When Do You Need a Crown?
A crown is the right step when a tooth needs more support than a filling can give. In our experience the teeth that cause the most trouble are the back ones, where years of chewing pressure find any weak spot.
Your dentist may suggest one in these situations:
- After root canal treatment. The tooth is left hollow and brittle, and a crown stops it splitting.
- A cracked or fractured tooth. The crown holds the remaining structure together and stops the crack spreading.
- A large filling that keeps failing. Once a filling covers most of the biting surface, too little natural tooth is left to hold it.
- Heavy wear from grinding. Teeth worn flat can be rebuilt to their proper height.
- Cosmetic reshaping. A badly shaped tooth can be covered rather than patched again.
Signs Your Dentist May Recommend One
Watch for sharp pain on biting, a tooth that feels jagged against your tongue, a filling that has come loose more than once, or sensitivity that lingers after hot and cold. None guarantees a crown, but each is worth an appointment. If a tooth is beyond saving, your dentist will cover the alternatives, including how a dental implant compares with a crown.
Helpful Tip: Book while the tooth is sensitive rather than painful, because a cracked tooth caught early can usually still be crowned.
What Are Dental Crowns Made Of?
Dental caps are made of several materials. The right one depends on which tooth is being treated and how much force it has to take.
All-ceramic and porcelain. The most natural looking option, because ceramic reflects light much as enamel does. Best suited to front teeth and premolars.
Zirconia. A very strong ceramic that handles heavy chewing pressure well, so it suits back teeth.
Porcelain bonded to metal. A metal core with a porcelain outer layer, combining strength with a tooth-coloured finish. A dependable middle option used for decades.
Gold and metal alloys. Extremely durable and kind to the opposing teeth, though the colour rules them out at the front.
When a dentist caps a tooth, some crowns can be milled and fitted in one appointment, removing the need for a temporary. You can read more about how same-day crowns work.
Choosing a Material for Front vs Back Teeth
Front teeth are judged on how they look, so ceramic usually wins. Back teeth are judged on how they hold up, so zirconia or a bonded crown makes more sense.
Expert Tip: If you grind your teeth, mention it before the material is chosen, because that single detail often shifts the recommendation from ceramic to zirconia.
How Long Do Crowns Last?
Published figures vary more than you might expect. Cleveland Clinic gives a range of five to fifteen years. A study of porcelain-bonded and metal crowns placed at an Australian dental school found 83.9 per cent still standing at five years. A separate retrospective study following over 1,000 single crowns found 80.9 per cent still surviving after ten years.
Note: Those numbers disagree because they measure slightly different things. Some track the crown, others the tooth underneath, and the material, the bite and whether the patient grinds all shift the result. Treat any single figure as a rough guide rather than a promise.
In practice, a well-fitted crown on a healthy tooth, looked after properly, will usually last a decade or more. A crown on a tooth with ongoing gum trouble, or in a mouth that grinds heavily at night, will not.
Looking After Your Crown
A crown cannot decay, but the natural tooth underneath it still can, and the margin where crown meets tooth is where most problems start.
Day to day, the routine is the same as for any other tooth:
- Brush twice daily with fluoride toothpaste, paying attention to the gum line.
- Clean between the teeth daily with floss or interdental brushes.
- Keep up with hygienist appointments so the margins get checked.
- Avoid chewing ice, pen lids and anything hard enough to chip ceramic.
Everyday Habits That Shorten a Crown’s Life
Opening packaging with your teeth, biting nails and grinding at night do the most damage. Grinding is the worst, because the force repeats night after night and you are asleep for all of it.
Helpful Tip: If you wake with a sore jaw or a dull headache, ask about a night guard. It costs far less than replacing a cracked crown.
Are Crowns Worth It?
For a genuinely weakened tooth, yes, and the comparison that matters is not crown against nothing, but crown against losing the tooth. Once a molar cracks below the gum, the options narrow quickly. A crown fitted at the right moment keeps your own root in place, and your own root is worth keeping.
There is a judgement call, though, and an honest dentist will make it with you. A tooth with a small chip and plenty of healthy structure left may only need a filling or an onlay. Crowning it would mean removing sound enamel unnecessarily. The question is simple: how much natural tooth is left, and will a smaller repair hold?
Cost is part of that judgement too. Private crown prices in the UK vary widely by material and by practice. Our guide to the cost of dental crowns in the UK breaks it down.
Dental Crowns at Smiledent in North London
Our team fits crowns across the full range of materials. The recommendation always starts with the tooth in front of us, not a default.
- Assessment first. We check how much natural tooth remains before suggesting a crown, and say so if a smaller repair will do.
- Material matched to the tooth. Ceramic where appearance leads, zirconia or bonded crowns where strength does.
- One-visit smiles. Our CAD/CAM system designs and mills certain crowns in the practice. Suitable cases are prepared and fitted the same day, with no temporary in between.
- Smaller repairs too. We also make porcelain inlays and onlays here. A tooth that does not need full coverage can have a partial restoration instead.
You can read more about dental crowns at our North London practice, including which cases suit the same-day route.
Frequently Asked Questions – Dental Crowns
These are the questions patients ask most often once a crown has been suggested, covering what crowns are made from, what the appointment involves and how long the finished crown should last.
What are crowns for teeth used for?
Crowns for teeth are used to cover and strengthen a tooth that is too damaged for a filling to hold. That usually means a tooth that has cracked, been root treated, worn down from grinding, or lost most of its structure to a large filling. The crown restores the shape and biting strength while the natural root stays in place.
What are tooth caps, and are they the same as crowns?
Yes. They are two names for the same restoration. “Crown” is the clinical term your dentist will use, and “cap” is the everyday word most patients reach for because of what it looks like. Nothing about the treatment, the materials or the cost changes depending on which term is used.
What are dental caps made of?
Most are made from all-ceramic or porcelain, zirconia, porcelain bonded to metal, or gold and other metal alloys. Ceramic and zirconia are the most common choices today. Which one suits you depends on where the tooth sits in your mouth and how much biting force it has to handle.
Does getting a crown hurt?
The tooth is numbed before any preparation begins, so the appointment itself should not be painful. Mild sensitivity for a few days afterwards is normal, particularly to cold. If discomfort is sharp, lasts more than a week or appears when you bite, contact the practice so the fit can be checked.
How many appointments does a crown take?
Traditionally two: one to prepare the tooth and take an impression, and a second to fit the finished crown once the laboratory has made it. A temporary crown covers the gap in between. Where a practice mills crowns on site, suitable cases can be completed in one appointment.
Can a crowned tooth still get decay?
The crown itself cannot decay, but the natural tooth underneath can, usually at the margin where the two meet. This is why brushing along the gum line and cleaning between the teeth matters just as much after a crown as before. Regular hygienist visits let those margins be checked.
What happens if a crown falls off?
Keep the crown, avoid chewing on that side, and book an appointment promptly. In many cases the same crown can be re-cemented if the underlying tooth is sound. Leaving the exposed tooth uncovered risks sensitivity, drifting of the neighbouring teeth and further damage.
Can you whiten a crown?
No. Whitening products work on natural enamel and have no effect on ceramic, porcelain or metal. If you are planning to whiten your teeth and also need a crown at the front, whiten first. Your dentist can then match the crown to your new shade.
What is the difference between a crown and a veneer?
A veneer is a thin facing bonded to the front surface of a tooth, used mainly for appearance. A crown covers the whole tooth and is used when the tooth needs structural support. If a tooth is weakened rather than simply discoloured, a crown is usually the appropriate choice.
Crowns in Short: What to Remember
A crown is one of the more straightforward restorations in dentistry. Most of the confusion around it comes from the language, not the treatment. Once you know a cap and a crown are the same thing, the rest follows logically.
The short version:
- What it is. A custom cover that goes over a damaged tooth while the natural root stays put.
- Cap or crown. Two words, one restoration.
- Materials. All-ceramic, zirconia, porcelain bonded to metal, and gold.
- Lifespan. Published figures run from about five to fifteen years, and the spread reflects material, bite and habits.
- Aftercare. The tooth underneath can still decay, so the gum line needs proper attention.
The decision worth taking time over is not the material, since your dentist guides that, but whether the tooth genuinely needs full coverage. Ask how much natural structure is left and whether a smaller repair would hold.
Book a Crown Consultation with Smiledent
A consultation tells you whether a crown is the right fix for your tooth or whether something smaller will do. You leave knowing the actual cost, not a range.
Our porcelain-bonded and all-porcelain crowns are both £695, with same-day CAD/CAM crowns at £800. Larger treatment plans from £1,000 can be spread over time with 0% interest finance through Tabeo. Book a crown consultation today and one of our dentists will assess the tooth and talk you through the options.
Information Sources
Survival of single-unit PFM and metal crowns placed by students (PMC, 2021)
Dental Crowns: Types, Procedure & Care (Cleveland Clinic)
Retrospective clinical study of tooth-supported single crowns (PMC)
