Sometimes, but not always. A dentist is usually responsible for a failed crown when the problem comes from the work itself: a poor fit, a bad bite adjustment, cement that didn’t hold, or decay that should have been treated before the crown went on. When a crown fails because of grinding, an accident, new decay from hygiene problems, or simple age, it usually isn’t the dentist’s fault.
Timing matters a lot. A crown that falls off in the first few weeks points to a different cause than one that cracks eight years later. Below I’ll walk through how long crowns should last, why they fail, who usually pays, and what to do if you think your crown was done wrong. I’ll also explain how we handle failed crowns at Dental Line in Encino.
Quick Answer: When Is the Dentist Responsible?
| Usually the dentist’s responsibility | Usually not the dentist’s responsibility | Depends on the details |
|---|---|---|
| Crown never fit well, with gaps at the edge | Crown broke from a fall, sports injury or biting something very hard | Decay under the crown a few years later |
| Bite left too high, causing pain or fracture | Grinding or clenching without wearing a recommended night guard | Tooth needs a root canal after the crown |
| Crown came loose within days or weeks | Normal wear after many years | Crown chipped in the first year or two |
| Decay or a crack under the tooth wasn’t treated first | Skipped checkups or poor cleaning around the crown | Gum disease weakened the tooth |
A failure on its own doesn’t prove anyone did something wrong. Teeth are living tissue, and some fail even when the dentist did everything right. What matters is whether the care met the standard of care: what a reasonably careful dentist would have done in the same situation.
How Long Should a Dental Crown Last?
Most crowns last between 5 and 15 years, and many last longer. A large review of crown studies (Sailer et al., 2015) found that about 95% of metal-ceramic crowns and about 97% of lithium disilicate (glass-ceramic) crowns were still in place after five years. So a crown that fails in the first year or two is the exception. That’s a fair reason to ask questions.
| Material | Typical lifespan | Strength and appearance |
|---|---|---|
| Porcelain (fused-to-metal or all-porcelain) | 5 to 15 years | Very natural look with moderate strength; can chip under heavy bite forces |
| Zirconia | 10 to 20+ years | Very strong with good esthetics; well suited for back teeth |
| Ceramic (e.g., lithium disilicate) | 8 to 15 years | Excellent esthetics and reliable strength for front and some back teeth |
| Gold or metal alloy | 15 to 30+ years | Exceptional durability and fit; less natural in visible areas |
The same review found that zirconia crowns with a porcelain outer layer chipped more often than metal-ceramic crowns, especially on back teeth. That’s one reason solid (monolithic) zirconia is a common choice for molars today.
Your habits matter as much as the material. Grinding, poor cleaning around the crown’s edge, and skipped checkups all shorten a crown’s life. A crown on a tooth that’s had a root canal also depends on the strength of the tooth underneath.
What Is a Dental Crown For?
A dental crown is a custom cap that covers a damaged or weakened tooth. It protects what’s left of the tooth, spreads out chewing forces, and restores its shape and appearance. Crowns are common after large fillings, after a root canal, or when a tooth has cracked. For smaller damage, an inlay or onlay can sometimes save more natural tooth.
Why Do Dental Crowns Fail?
Crowns fail for three main kinds of reasons: mechanical (fit, cement, bite), biological (decay, gum disease, nerve problems), or material (chips and cracks). Each one looks different and points to a different answer about responsibility.
| Cause | When it usually shows up | Signs to watch for | Who’s usually responsible |
|---|---|---|---|
| Poor fit or cement failure | Days to months | Crown feels loose, comes off, or food catches at the edge | Often related to the original work |
| Bite too high | Days to weeks | Pain when biting, soreness, the tooth feels “hit first” | Often related to the original work, and usually an easy fix |
| Decay under the edge | Usually years | Sensitivity, dark line at the gum, bad taste | Usually hygiene or diet; sometimes a poor seal |
| Crown chip or fracture | Any time | Rough edge, visible crack, piece missing | Grinding, trauma or material choice |
| Tooth nerve problems | Weeks to years | Lingering pain, swelling, pimple on the gum | Often the tooth’s condition; sometimes missed before treatment |
| Gum disease or root fracture | Usually years | Loose tooth, gum recession, swelling | Usually biological; depends on diagnosis |
Signs Your Crown Is Failing
- Sensitivity to hot or cold, or pain when you bite
- A crown that feels loose or moves
- A bad taste or bad breath around the crown
- Visible chips, cracks or a dark line at the gum
- Swelling or a pimple on the gum near the tooth
Catching these early often means a simpler fix, like re-cementing or adjusting the bite. Waiting can turn a small problem into a root canal or an extraction.
What to Do If Your Crown Breaks or Falls Off
- Keep the crown. If it came off in one piece, rinse it and put it in a clean container. Bring it to your appointment.
- Don’t chew on that side. The tooth underneath is weaker and more sensitive without its crown.
- Manage the pain. Over-the-counter pain relievers and a cold compress can help until you’re seen.
- Use temporary cement only short term. Pharmacy dental cement can hold a loose crown for a day or two. Follow the directions carefully and don’t use household glue.
- Write things down. Note when the crown was placed, when the problem started, and take photos. This helps your dentist, and it matters if there’s a question about who pays.
- Call your dentist promptly. If you have severe pain or swelling, ask about same-day emergency care.
My Crown Failed Within a Year. Who Pays?
There’s no law that sets how long a crown must last. Each practice sets its own policy. As a general guide:
- Within days or weeks: The cause is often fit, cement or bite. Most dentists will re-cement, adjust or redo the crown at no charge or for a reduced fee.
- Within the first year or two: It depends on the cause. If the crown or the lab work was defective, many practices will replace it. If it broke from an accident or grinding, you’ll usually pay at least part of the cost.
- After five years or more: The crown has done its job. Replacement is usually treated as new treatment.
Patients and dentists often see this differently. A 2024 survey from New Zealand found that patients generally expect longer warranties than dentists offer, and that dentists prefer clearly defined warranty terms. The simplest way to avoid a dispute is to ask about the warranty before the crown is placed and get it in writing.
At Dental Line, we talk through warranty details during your evaluation, so you know your options and any fees before treatment starts.
Will Insurance Pay to Replace a Failed Crown?
Maybe not right away. Many dental plans limit crown replacement on the same tooth to once every five years. If your crown fails sooner, your plan may deny the claim even if you need a new one. That’s an insurance rule, not a dental standard, so check your plan’s frequency limits before treatment. We accept most PPO insurance plans and can help you check your benefits. If cost is a concern, ask about financing options.
What to Do If You Think Your Crown Was Done Wrong
Most crown problems are solved with a conversation and a follow-up visit. Escalate step by step:
| Step | What it involves | Best for |
|---|---|---|
| 1. Talk to your dentist | Explain your symptoms and ask what caused the failure and what they’ll do about it | Almost every case; most problems end here |
| 2. Get a second opinion | Have another dentist examine the crown and take X-rays | When you’re unsure of the cause or don’t trust the answer |
| 3. Request your records | Ask for copies of your X-rays and treatment notes; you have a legal right to access your records | Any dispute, and before seeing a new dentist |
| 4. File a complaint with the Dental Board of California | The Board reviews quality of care and can discipline licensees | Serious concerns about how care was provided |
| 5. Talk to an attorney | A lawyer can tell you whether you have a malpractice claim | Significant harm, such as losing the tooth or needing major treatment |
One thing many patients don’t know: the Dental Board of California does not handle fee disputes, refunds or financial compensation. It looks at whether a dentist met professional standards. If you want your money back, that’s a conversation with the practice, your insurer, or an attorney.
Can I Sue My Dentist for a Bad Crown?
You can, but few crown cases go that far. To win a malpractice claim you generally need to show that the dentist didn’t meet the standard of care and that this caused you real harm. A crown that simply wore out or broke in an accident won’t qualify. Common examples of possible negligence include a crown that never fit, a bite left so high it cracked the tooth, or decay or an infection that wasn’t diagnosed before the crown was placed. Claims also have strict filing deadlines, so if you’re considering legal action, speak with an attorney early.
Crown Repair and Replacement Options
The right fix depends on what failed and how healthy the tooth underneath is. We start with an exam, a bite check, and digital X-rays or a 3D scan when we need a closer look.
| Option | When it works | What to expect |
|---|---|---|
| Re-cementing | Crown is intact and the tooth underneath is healthy | Often done the same day |
| Bite adjustment | Crown is fine but hits too hard | Quick polishing in one visit |
| Repair or bonding | Small chip in porcelain | Smoothing or tooth-colored bonding |
| New crown | Crown is cracked, or there’s decay underneath | Sometimes a stronger material like zirconia; see same-day vs. traditional crowns |
| Root canal, then crown | Infection or nerve damage | Treats the tooth first, then restores it |
| Extraction and replacement | Tooth can’t be saved | Options include an implant or a bridge; compare them in bridge vs. implant |
How to Prevent Your Next Crown From Failing
- Brush twice a day and floss carefully where the crown meets the gum.
- Wear a night guard if you grind or clench. Jaw pain or headaches can also point to a TMJ problem.
- Don’t chew ice, hard candy, pens or bottle caps.
- Keep up with regular exams and cleanings so problems at the crown’s edge are caught early.
- Treat bleeding or receding gums promptly. Our gum disease treatment helps protect the teeth that support crowns.
How Dental Line and Dr. Irena Starchenko Handle Failed Crowns
At Dental Line, Dr. Irena Starchenko leads our restorative care. When a patient comes in with a failed crown, whether we placed it or another office did, we focus on finding out why it failed before we fix it. Replacing a crown without fixing the cause usually means replacing it again.
- A clear diagnosis. Visual exam, bite check, digital X-rays, and a 3D scan when needed.
- Honest answers. We’ll tell you what we see, including whether the failure looks like normal wear, a biological problem, or an issue with the original work.
- The most conservative fix that will last. Re-cementing or repair when that’s enough; replacement when it isn’t.
- Written findings. We document what we find, which helps if you need it for insurance or a warranty discussion with another office.
- Comfort options. We offer sedation when it’s appropriate.
What to Expect at Your Appointment
When you call, tell us when the crown was placed, what you’re feeling, and whether you kept the crown. That helps us decide how quickly we need to see you and whether same-day re-cementing might work. Bring any photos, old X-rays and notes about the original treatment. Severe pain, swelling or a broken tooth should be flagged as urgent.
Call (747) 265-6179 or request an appointment online. We’re at 18024 Ventura Blvd, Encino, CA 91316.
Frequently Asked Questions
Is the dentist responsible if my crown fell off after a month?
Often, yes. A crown that comes off within weeks usually points to a cement or fit problem. Most dentists will re-cement or redo it at no charge or a reduced fee. Call the office that placed it first.
Should a dentist replace a failed crown for free?
It depends on the cause and the timing. No law requires it. Many practices replace crowns that fail early because of the work or the lab, but not crowns damaged by an accident, grinding or new decay. Ask for the practice’s policy in writing.
How long are dental crowns under warranty?
There’s no standard. Each practice sets its own terms, and some have no formal warranty. Ask before treatment and get it in writing.
Is a dentist liable to fix a poorly installed crown?
If the crown doesn’t fit or the bite was left wrong, most dentists will correct it. Start by talking to them. If that doesn’t resolve it, get a second opinion and request your records.
Can I sue my dentist for a bad crown?
Only if the dentist fell below the standard of care and that caused real harm. Normal wear or accidental damage won’t qualify. Claims have strict deadlines, so talk to an attorney early if you’re considering it.
What percentage of crowns fail?
Most don’t fail early. One large review found about 95% of metal-ceramic crowns and about 97% of lithium disilicate crowns were still in place after five years.
Why did my crown only last two years?
Common reasons include grinding, decay at the crown’s edge, a high bite, a weak tooth underneath, or a material that wasn’t strong enough for that tooth. An exam and X-rays can usually show which one.
Can a loose crown be re-cemented?
Often, yes, if the crown is intact and the tooth underneath is healthy. Keep the crown and bring it with you.
Can I eat normally with a loose crown?
No. Chew on the other side, stick to soft foods, and avoid sticky or hard foods until you’re seen.
Is a crown falling off a dental emergency?
Usually not, unless you have severe pain, swelling, bleeding or a broken tooth. A crown that came off cleanly can generally wait a day or two if you keep the crown safe and avoid chewing on that side. If it happens on a weekend and you’re in pain, call us; our emergency dentistry team handles urgent cases.
What if I swallowed my crown?
Most swallowed crowns pass on their own, but call your dentist so they can plan the replacement. If you coughed hard, have trouble breathing, or think the crown may have gone down your windpipe, get emergency medical care right away.
Why is my tooth black under the crown?
A dark tooth under a crown is often the metal layer of a porcelain-fused-to-metal crown, or an old metal filling or post underneath. It can also be decay. You can’t tell which by looking, so have it checked, especially if the tooth is sensitive or smells.
Why does my crown keep falling off?
A crown that comes off more than once usually means there isn’t enough tooth left to hold it, the tooth is too short or tapered, there’s decay underneath, or the bite is putting too much force on it. Re-cementing again rarely fixes that. The tooth may need a buildup, a post, or a new crown design.
Can a dentist remove a crown?
Yes. Some crowns can be taken off whole and re-cemented, but most permanent crowns have to be cut off and replaced. Your dentist will tell you which applies before starting.
What kind of dentist does crowns?
General dentists place most crowns. A prosthodontist, a specialist in crowns, bridges and dentures, may handle complex cases. At Dental Line, Dr. Starchenko places crowns in our Encino office.
What if the root canal under my crown fails?
Signs include pain, swelling or a pimple on the gum near a crowned tooth that had a root canal. The tooth may need the root canal redone, a minor surgery at the root tip, or an extraction. Read more in our root canal guide.
How often should crowns be checked?
At every routine exam, usually every six months. Come in sooner if you notice sensitivity, looseness or a change in your bite.
The Bottom Line
A failed crown isn’t automatically your dentist’s fault, and it isn’t automatically yours. The cause and the timing usually tell the story. Keep the crown, write down the dates, talk to your dentist first, and get a second opinion if you’re not satisfied with the answer.
If you’re in Encino or nearby and your crown is loose, broken or painful, schedule a visit with Dental Line. We’ll find the cause and recommend the most conservative fix that will last. Learn more about our dental crowns.
Sources
- Sailer I, et al. All-ceramic or metal-ceramic tooth-supported fixed dental prostheses? A systematic review of the survival and complication rates. Part I: Single crowns. Dental Materials, 2015
- Attitudes regarding a warranty and the expected longevity of dental treatment amongst New Zealand dentists, dental students, and patients: a mixed methods survey. BMC Oral Health, 2024
- Dental Board of California: Complaint Information for Consumers
- U.S. Department of Health and Human Services: Individuals’ Right to Access Health Information
