How long do crowns and bridges last? Nobody publishes a number, and here is what exists instead

You have almost certainly been given a range already — a confident span of years, repeated across a dozen pages. We went looking for where it comes from on 24 September 2026 and could not find a primary source we would print. So this page does not print one either, and instead sets out exactly what is published, by whom, and what it actually means.

This is a deliberately unsatisfying answer. It is also the only one we can defend, and a made-up number in its place would read exactly like a real one.

What the ADA and the NHS actually say

The American Dental Association's consumer page on crowns explains what a crown does and when one is used, and gives no lifespan figure at all. Its page on bridges is the same: no number, and instead an emphasis on the foundation — "it's very important to keep your remaining teeth healthy and strong", because a bridge is only as sound as the teeth carrying it.

The ADA is willing to make one general statement, and it makes it about fillings: "no dental filling lasts forever". The NHS, on the charges page last reviewed on 13 March 2025, puts the same idea in one sentence about crowns: "Crowns may need to be replaced in the future." Two national bodies, writing for the public, decline to give a number. That is the state of the published evidence, and everything else you have read is somebody's estimate.

What is published: how often somebody else will pay again

Fee schedules do carry intervals, printed right beside the fee. They look like durability figures and they are not. They state how frequently a programme will fund the same procedure for the same person — a budgeting rule written by an administrator, not a forecast made by a dentist.

Look at the first row and you can see why these cannot be read as lifespans. Pennsylvania will fund a new all-ceramic crown once every five years. Washington's note on the same procedure is the opposite kind of limit — "limit 1 per year, unless authorized" — which reads as a control on volume rather than a statement about wear. Montana prints no interval on that line at all but restricts its full cast metal crown to "Molars for Adults, 2/calendar year". Three payers, three completely different shapes of rule, none of them about how long a crown survives in a mouth.

The trap is easy to fall into and it runs in one direction. A five-year funding interval quietly becomes "crowns last five years" in the retelling, and then becomes a benchmark someone measures their own dentistry against. It is not one.

What the schedules do tell you about failure

There is a more useful signal in these documents, and it is the existence of the repair lines. A payer only writes a line for something that happens often enough to need funding. All three schedules carry lines for putting a crown back on and for repairing one in place:

• Re-cementing a crown that has come off: $25.00 in Pennsylvania, $32.00 in Washington, $59.28 in Montana.
• Repairing a crown in the mouth after the material has failed: $42.00 in Pennsylvania, $162.03 in Montana, $200.00 in Washington.
• Re-cementing a bridge: $30.00, $54.00 and $79.04 across the same three.

None of that says anything about your crown. It says that crowns coming off and crowns fracturing are ordinary, funded, routine events rather than rare disasters — which is worth knowing when a practice describes a restoration as a one-off purchase. What to do when it happens is on the page about a crown that has come off.

The words we will not use

Cap & Span does not describe any restoration as permanent, guaranteed, or lasting a lifetime, and we would treat a quote that did as a reason to ask more questions rather than fewer. "Permanent" has one defensible meaning in dentistry — fixed in place, not removable by you — and that is worth saying plainly when somebody searches for it. It does not mean forever, and the two get blurred constantly in marketing.

The genuinely permanent part of this is not the restoration. It is the preparation: the tooth structure removed to make room for a crown does not come back, and a bridge removes it from two teeth rather than one. That is the irreversible decision, and it is made before the crown is ever fitted — which is why knowing what each crown type costs and requires is worth doing beforehand.

Three different questions hiding in one

"How long will it last" is usually standing in for something more specific, and separating the three makes each of them answerable by somebody. The first is financial: when will I have to pay for this again? That one is partly answerable from a plan document and a fee schedule's funding intervals, and it is the subject of what coverage pays for crowns and bridges.

The second is clinical: is this tooth in good enough condition for the restoration to work? Only an examination answers that, and it is the question worth putting to the dentist directly rather than to a search engine. The third is about maintenance: what do I do so this lasts as long as it can? That is also a clinical question, and the answer comes from the person who fitted it and knows what is underneath.

None of those is answered by an average number of years, which is the one thing everybody goes looking for and the one thing nobody publishes.