A porcelain crown that suddenly pops off while eating, or cracks, can startle anyone. This article guides you to respond calmly and explains why an early visit matters.
- A porcelain crown usually comes off or breaks because of weak cement, decay underneath, hard food or grinding.
- Keep the crown, avoid chewing on that side and do not glue it back with household glue.
- Come in early because an exposed tooth decays easily and neighbouring teeth may drift.
- An intact crown on a healthy tooth can be cemented back, otherwise a new crown is usually needed.
Why does a porcelain crown come off or break?
A porcelain crown is cemented onto a tooth that has been shaped for it. Coming off or breaking usually has one of these causes:
- The cement has weakened over time and leaves a gap at the edge of the crown.
- Decay has developed underneath, changing the tooth so the crown no longer fits snugly.
- Biting hard objects such as bones, ice or hard seeds.
- Long-term teeth grinding that puts great force on the crown.
- A tooth stump that is too short or weak to hold the crown firmly.
What to do right away at home
- Keep the crown in a clean container and bring it to the visit. Do not throw it away.
- Rinse gently with lukewarm water and keep the exposed tooth clean.
- Avoid chewing on that side and avoid hard, sticky, hot or cold food.
- Do not glue the crown back with any household glue, as it can damage the crown, trap decay and harm the tissues in your mouth.
- If a broken edge is sharp and cuts the tongue, avoid that area and come in soon.
Is it a problem to wait?
An exposed tooth can become sensitive, decay easily and crack further. If left too long, the neighbouring teeth may drift into the gap, making it harder to fit the crown again. So please come in early, usually within a few days.
How will the dentist handle it?
The dentist will examine both the crown and the tooth underneath:
- If the crown is intact, still fits well and the tooth is healthy, it can be cleaned and cemented back.
- If the tooth has decay, it must be treated first before the crown is remade.
- If the crown is broken, no longer fits or the tooth has changed, a new crown is usually needed.
- If grinding is the cause, the dentist may advise wearing a protective night guard.
The dentist will advise the right option for your situation. You can read about what a night guard for grinding is.
How to reduce the chance of a crown coming off
- Brush carefully and clean between teeth to avoid decay at the edge of the crown.
- Do not bite hard objects with porcelain teeth.
- Have regular check-ups to confirm the crown still fits well.
See also whether porcelain crowns harm teeth and filling or porcelain crown. Call the hotline 028.3868.1097 or visit Nha Khoa Kỳ Hòa at 266A - 268, Đường 3 Tháng 2, Phường Hòa Hưng, Ho Chi Minh City.
Frequently asked questions
Can I glue a fallen crown back myself?
No. Non-dental glue can damage the crown and the tooth. Keep the crown and see the dentist for a proper check.
Can a crown that came off be put back?
If the crown is intact and the tooth beneath is healthy, the dentist can clean it and cement it back. If the tooth is decayed or the crown is broken, further treatment and usually a new crown are needed.
How soon should I come in after a crown comes off?
Come in early, usually within a few days. If left too long, the tooth is prone to decay and sensitivity, and neighbouring teeth may drift, making it harder to refit the crown.