How long does a dental crown last is a reasonable question when you are about to invest in one. The realistic answer is that most crowns serve for ten to fifteen years, plenty last considerably longer, and the biggest variable is not the crown itself but the tooth underneath it.
On this page
- The realistic lifespan
- What actually decides how long yours lasts
- Does the material make a difference?
- Why crowns fail, and it is rarely the crown
- How to make yours last longer
- Signs a crown needs attention
- What happens when one needs replacing
- In summary
The realistic lifespan
Ten to fifteen years is the usual expectation, and it is common for crowns to run well past that. I regularly see crowns doing perfectly good service after twenty years or more.
Equally, some fail sooner, and almost always for reasons that were identifiable at the outset: heavy grinding, poor cleaning at the margin, or a tooth that was already heavily compromised before the crown went on.
What actually decides how long yours lasts
Four things, roughly in order of importance:
- How well you clean the margin. The join where crown meets tooth, right at the gum line, is where trouble starts. Plaque there causes decay in the natural tooth beneath.
- Whether you grind. Clenching forces are enormous and shorten the life of every restoration.
- How much healthy tooth was left underneath. A crown on a strong tooth outlasts a crown on a heavily broken-down one.
- Where it sits. Back teeth take far more force than front teeth.
Notice that three of those four are about the tooth and the habits, not the crown.
Does the material make a difference?
Some, though less than people expect for everyday use.
All-ceramic crowns look the most natural and are the usual choice for front teeth. Porcelain bonded to metal is strong and long-established. Modern high-strength ceramics handle back-tooth forces very well and now cover most situations.
What matters more than the material is the fit and the seal, which is why a well-made crown from a good laboratory outperforms a poorly fitted one in any material. If you are considering the single-visit route, our page on same day crowns explains how those compare.
Why crowns fail, and it is rarely the crown
The crown itself very seldom wears out. What usually happens is one of these:
- Decay at the margin. The commonest cause by a distance. The crown cannot decay; the tooth beneath it certainly can.
- Gum recession, which exposes the margin and sometimes the darker root beneath, and creates a new area to keep clean.
- The tooth fracturing beneath the crown, particularly on root-treated teeth that were not protected soon enough.
- The cement failing, which is why crowns occasionally come off. Our post on what to do when a crown comes off covers the immediate steps.
- Grinding, chipping the porcelain over years.
How to make yours last longer
- Clean the gum line properly. Angle your brush towards where crown meets gum, twice daily.
- Clean between your teeth every day. The margins between teeth are where decay under crowns begins.
- Keep your check-ups, where the margins are examined and early decay is caught while it is still small.
- Wear a night guard if you grind. Our post on the signs of night-time grinding may be worth a read.
- Be sensible with very hard foods, and never open packets with your teeth.
Signs a crown needs attention
- Sensitivity to hot, cold or sweet things around that tooth
- Discomfort when biting
- A rough edge you can feel with your tongue
- Food catching at the margin
- A dark line appearing at the gum line
- Any movement in the crown
- Persistent bad taste around the tooth
Plenty of failing crowns give no warning at all, which is why the examination matters. Our page on dental crowns covers what is checked at each visit.
What happens when one needs replacing
Usually the old crown is removed, any decay beneath cleaned away, and a new crown made. That is essentially the original process repeated.
Occasionally there is not enough sound tooth left to support a new crown, in which case other options are discussed honestly, including whether the tooth can be built up first, whether root canal treatment is needed, or whether the tooth has genuinely reached the end of its useful life.
The NHS overview of dental crowns gives useful general background if you would like to read further.
In summary
Most dental crowns last ten to fifteen years and often longer, and what shortens them is nearly always decay at the margin or grinding rather than the crown wearing out. Clean the gum line thoroughly, clean between your teeth daily, keep your check-ups, and protect against clenching.
If you have an older crown you are unsure about, or a tooth that may need one, ring us on 01255 422506. Our posts on inlays and onlays and temporary crowns coming off cover the related questions patients most often ask.
This article is general information rather than personal dental advice. Every mouth is different, so please speak to your dentist about your own teeth.