A lot of the work we see was done well twenty or thirty years ago. The materials of that era simply do not age the way modern ones do, and at some point replacement stops being optional.
How you know they are failing
The dark line at the gum is the classic sign. Older crowns were built on a metal core, and as the gum recedes that metal edge becomes visible. It is cosmetic at first and structural later.
The more serious signs are recurrent decay under the margin, a crown that feels different when you bite, or a persistent bad taste. Those mean the seal has gone.
What replacement actually involves
Removing an old crown is more work than placing a new one, and what is found underneath determines the plan. Sometimes there is plenty of sound tooth. Sometimes there is decay that has been progressing quietly for years.
That uncertainty is why an honest quote for this work includes a contingency: a price if the tooth is sound, and a price if it needs a build-up or a root canal first.
Why doing several at once often makes sense
If six crowns were placed in the same decade, they tend to fail in the same decade. Replacing them one at a time means matching each new crown to the ageing ones beside it, and repeating that compromise every few years.
Doing the visible zone together costs more up front and usually produces a better and cheaper result over ten years.
The cost picture
In the US, replacement crowns are typically quoted in the same band as new ones, with build-ups and any root canal treatment billed separately. It is one of the most common reasons patients over fifty look at treatment abroad, because the unit count adds up quickly.
Old crowns rarely fail politely. If yours are from the nineties, the sensible move is to have them assessed while you still have a choice about timing.
If you want to know how this would apply to your smile, book a remote consultation with us.
