Quick answer: A well-made dental crown commonly lasts ten to fifteen years, and often considerably longer. Lifespan depends less on the crown material than on what happens underneath it: the health of the remaining tooth, how well the margin is kept clean, and whether the patient grinds or clenches.
What a crown is doing
A crown, sometimes called a cap, covers the whole visible portion of a tooth. It is used when there is not enough sound tooth structure left to support a filling — after a large fracture, after a root canal, where a tooth is heavily worn, or where a very large old restoration is failing.
The crown itself does not decay. The tooth underneath it can, and that is the single most common reason a crown eventually needs replacing.
What actually determines how long it lasts
The margin
The join between the crown and the tooth sits at or just below the gum line. If plaque is allowed to sit there, decay starts at the margin and works underneath. Flossing at the crown margin is not optional.
Grinding and clenching
Bruxism puts loads on a crown that it was not designed for. Patients who grind fracture porcelain, wear through occlusal surfaces and loosen cemented restorations far sooner than those who do not. If you wake with a sore jaw or your partner hears grinding, say so.
The remaining tooth
A crown on a tooth with plenty of healthy structure beneath it behaves differently from one on a heavily rebuilt tooth. How much sound tooth remains is often the biggest single predictor.
Gum health
If the gum recedes, the crown margin becomes exposed, which is both a cosmetic issue and a new site for decay. Keeping gum disease under control protects the restoration.
Signs a crown needs attention
- Sensitivity to cold or sweetness at the gum line around the crown
- A dark line appearing at the margin
- The crown feeling loose or moving when you bite
- Food consistently trapping around it
- Pain when biting on that tooth
- A chip or crack in the crown surface
Getting the most out of a crown
Brush twice daily and clean between the teeth every day, particularly at the crown margin. Keep to your examination and cleaning schedule so that decay at a margin is caught while it is small. If you grind, ask about a night guard. Avoid using teeth to open packaging or chew ice.
If a crown comes off
Keep it, do not chew on that side, and call (860) 756-5423. A crown that has debonded cleanly can often be recemented; the underlying tooth left exposed can become sensitive and can chip.
Frequently asked questions
How long does a dental crown last?
A well-made crown commonly lasts ten to fifteen years and frequently longer. The main variables are the health of the tooth underneath, how well the margin is kept clean, gum health, and whether the patient grinds or clenches.
Can a crowned tooth still get a cavity?
Yes. The crown itself cannot decay, but the natural tooth underneath it can, usually starting at the margin where the crown meets the tooth. This is why flossing around a crown matters.
Why does my crown feel sensitive?
Sensitivity at the gum line around a crown can indicate an exposed margin, recession, or decay starting underneath. Sensitivity on biting can indicate a problem with the underlying tooth. Either is worth having examined.
What should I do if my crown falls off?
Keep the crown, avoid chewing on that side, and call the practice. If the crown and the tooth beneath it are both intact, it can often be recemented rather than remade.
Does grinding my teeth shorten the life of a crown?
Significantly. Grinding applies forces a crown was not designed to absorb, which can fracture porcelain and loosen the cement. A night guard is usually recommended for patients who grind.
Book with Connecticut Family Dental Group
Connecticut Family Dental Group is at 88 New Britain Avenue, Rocky Hill, CT 06067. Call (860) 756-5423 or request an appointment. The practice is open Monday through Thursday.
This article is general information for patients and is not a substitute for an examination or individual clinical advice. If something in your mouth is painful, swollen or changing, call the practice.