| The most common dental crown problems are temporary sensitivity, a high bite, looseness, chips, marginal decay, a dark gum line, gum irritation, a crown falling out, nerve pain beneath the crown, and cosmetic mismatch. Nearly all are fixable, and the earlier you report them, the simpler and cheaper the fix. |
A crown is one of dentistry’s most dependable treatments, but dependable isn’t the same as invincible. Over a 10 to 15 year working life, a crown lives in a warm, wet, high pressure environment and occasionally complains. The good news, and it’s genuinely good, is that almost every complaint on this list has a routine fix.
Here are the ten dental crown issues and dental crown complications we see most at our North York practice, what causes each, and exactly how we put it right.
1. Sensitivity to Hot and Cold
The Cause: freshly prepared teeth often feel temperature for a few days to a couple of weeks, especially near the gum line.
The Fix: usually nothing but patience and a desensitizing toothpaste. Sensitivity that worsens after two weeks instead of fading gets a proper look, since it can signal a bite or nerve issue.
2. A Bite That Feels High
The Cause: if the crown meets its opposite tooth a fraction early, every bite hammers that one spot, causing soreness and even bruised ligament pain.
The Fix: a five minute polish adjustment in the chair. This is the easiest fix in dentistry, so please don’t spend weeks chewing around it.
3. A Loose Crown
The Cause: cement can wash out or fatigue over years, and sticky foods accelerate it. A rocking crown lets bacteria seep underneath.
The Fix: if the crown and tooth are sound, we clean both and re cement, often the same day. Waiting risks decay under the loose cap, which turns a re cement into a rebuild.
4. A Chipped or Fractured Crown
The Cause: ice, hard candy, an unlucky olive pit, or night grinding. Porcelain surfaces chip more readily than zirconia or metal.
The Fix: small chips polish or bond smooth. Larger fractures that expose the core mean a replacement crown, and a night guard if grinding was the culprit.
5. Decay at the Crown Margin
The Cause: the crown can’t decay, but the natural tooth at its gum line edge can, and this is the leading reason crowns are eventually replaced.
The Fix: small marginal cavities can sometimes be filled. Decay that undermines the crown means removing it, treating the tooth, and crowning again. Daily flossing is the entire prevention plan.
6. A Dark Line at the Gum
The Cause: the metal edge of an older PFM crown showing as gums naturally recede. Harmless, but visible on front teeth.
The Fix: cosmetic only, so it’s your call. Replacing with an all ceramic or zirconia crown removes the line for good, and the options are compared in our guide to types of dental crowns.
7. Gum Irritation or Recession around the Crown
The Cause: plaque collecting at the margin, an imperfect fit, or occasionally sensitivity to a metal alloy.
The Fix: a professional cleaning and sharpened home care settles most cases. Persistent inflammation gets a fit assessment, and a metal sensitivity conversation where relevant.
8. The Crown Falls Out Entirely
The Cause: failed cement, decay under the crown, or trauma. Alarming, rarely an actual disaster.
The Fix: keep the crown safe, avoid chewing on that side, and call us promptly, we keep same day emergency slots. An intact crown on a sound tooth is frequently re cemented on the spot. Avoid gluing it yourself with anything from a hardware store; that improvisation ruins more crowns than it saves.
9. Pain Deep under the Crown
The Cause: the nerve inside a crowned tooth can become inflamed or infected, sometimes years later. Throbbing, pressure pain, or a bump on the gum are the tells.
The Fix: typically a root canal, which can often be performed through the crown, followed by sealing or a new crown. Lingering, waking you at night pain is urgent; our emergency guide to root canal warning signs covers what to watch for.
10. The Colour or Shape Never Looked Right
The Cause: a shade mismatch, or natural teeth whitening around a crown that stays the same colour.
The Fix: crowns can’t be whitened, so the sequence matters: whiten first, then match the crown. A poorly matched front crown can be remade, and modern ceramics make the second attempt far easier to blend.
The Pattern behind All Ten
Read back through the fixes and one theme repeats: early is easy. A high bite reported in week one is a polish; endured for a year, it’s a cracked crown. A loose crown re cemented promptly is a 20 minute visit; ignored, it’s decay and a rebuild. Common problems with dental crowns are rarely emergencies on day one, and rarely simple by month six.
That’s the whole argument for six month checkups, where we inspect every crown margin as a matter of routine, and for calling us when something feels off rather than waiting for pain. Prevention specifics live in our guide to how long dental crowns last, and the full treatment picture in the pillar on dental crowns in North York.
A Crown Problem Is Usually a Small Problem, Today
If your crown is sensitive, loose, chipped, or sitting in a zip lock bag on your counter, bring it to a tooth cap dentist in North York who fixes these every week. Call Keele & Sheppard Dentistry at 416-398-7460 for a same day assessment.
FAQs about Dental Crown Problems
Q1. Why does my crown hurt when I bite?
The most common cause is a bite sitting slightly high, which concentrates chewing force on one spot and bruises the tooth’s ligament. It’s fixed with a quick polish adjustment. Pain that throbs, lingers, or wakes you at night points instead to the nerve and needs prompt assessment.
Q2. What should I do if my crown falls off?
Retrieve and keep the crown, avoid chewing on that side, and call your dentist promptly. An intact crown on a sound tooth can often be re cemented the same day. Don’t use household glue, which contaminates the crown and can make professional re cementing impossible.
Q3. Can a crowned tooth get a cavity?
Yes, at the margin where crown meets natural tooth near the gum line. Marginal decay is the leading reason crowns are replaced. The crown itself can’t decay, so prevention is entirely about flossing that edge daily and having margins checked at regular hygiene visits.
Q4. Why is my crown sensitive to hot and cold?
Mild temperature sensitivity is normal for days to a couple of weeks after placement while the tooth settles. Desensitizing toothpaste helps. Sensitivity that persists beyond two weeks, worsens, or turns into lingering pain suggests a bite issue or nerve inflammation and deserves an examination.
Q5. Can a chipped crown be repaired without replacing it?
Often, yes. Small porcelain chips can be polished smooth or repaired with bonding in one visit. Fractures that expose the crown’s core or compromise its seal require replacement. If grinding caused the chip, a night guard protects the repair and everything else in your mouth.
Q6. Are crown repairs covered by the CDCP?
Generally, yes: repairs and re bonding of existing crowns are covered for eligible patients without preauthorization. Full crown replacement is a major service that requires preauthorization and is subject to frequency limits. As a participating CDCP provider, we confirm your coverage before any work begins.
