Toothache After Dental Crown: Is It Normal & When to Worry?

Before you call the dentist, perform this quick self-assessment to help them diagnose the issue:

• The Bite Test: Does the toothache only happen at the exact second your upper and lower teeth touch? If yes, the crown is simply too high.
• The Temperature Test: Drink something cold. Does the pain vanish immediately, or does it throb for several minutes afterward? Lingering pain suggests nerve inflammation.
• The Gum Check: Look closely at the gums surrounding the crown. Do you see a small, pimple-like bump? This is a fistula (a drainage point for an infection) and is a dental emergency.

The Core Problem: Why Your Tooth Cap Is Paining

To understand a post-crown toothache, you have to understand what a crown is. A dental crown is a custom-made, hollow cap that fits completely over a natural tooth peg.

Because the natural tooth structure is trimmed down to create space for the crown, the delicate dental pulp (the nerve center inside the tooth) is exposed to the trauma of the drill. Furthermore, the crown creates a microscopic margin at the gumline. If that margin does not seal perfectly, bacteria can sneak underneath.

1. The Crown Is Too High

• The Mechanism: Your bite is slightly off, causing the crowned tooth to collide with the opposite teeth before the rest of your mouth closes. This bruises the ligaments holding the tooth in the bone.
• The Symptom: Pain strictly when biting or chewing. It feels like having a small seed permanently stuck on top of your tooth.
• The Fix: A painless, 5-minute bite adjustment at the dental clinic.

2. Deep Nerve Inflammation (Pulpitis)

• The Mechanism: The trauma of the drilling, or a pre-existing deep cavity, has caused the nerve inside the living tooth to become severely inflamed.
• The Symptom: Intense, throbbing tooth pain after crown placement that wakes you up at night and lingers long after eating hot or cold foods.
• The Fix: If the nerve is dying, the dentist will need to perform a root canal through the top of the crown to remove the infected tissue.

3. Incomplete Root Canal Treatment

• The Mechanism: If you had a root canal before the crown was placed, but the infected tissue was not entirely cleaned out to the very tip of the root, the bacteria will multiply.
• The Symptom: Swelling of the gums, cheek, or palate, accompanied by a dull, constant ache.
• The Fix: The dentist or endodontist will need to perform a root canal retreatment to fully clear the infection.

4. Secondary Caries (Decay Under the Crown)

• The Mechanism: The crown itself cannot decay, but the natural tooth stump underneath it absolutely can. If the cement seal degrades, plaque enters and rots the tooth.
• The Symptom: Sensitivity to sugary foods, bad breath, and pain near the gumline.
• The Fix: The crown must be removed, the decay treated, and a new crown fabricated.

5. Bruxism (Teeth Grinding)

• The Mechanism: You are unknowingly clenching or grinding your teeth in your sleep. Dental crowns do not wear down as easily as natural enamel, meaning the crowned tooth absorbs a massive, unnatural amount of force.
• The Symptom: Waking up with a sore jaw, a headache, and aching pain across multiple teeth.
• The Fix: Your dentist will fabricate a custom night guard to cushion your teeth while you sleep.

What’s normal pain after having a crown done?

Probably your teeth were carious and infected that lead to an extensive drilling, filling and shaving procedure to remove all the dead and infected tooth structure. It's normal to have some sort of heaviness, short lasting pain or sensitivity for a few days or a week. Your teeth and its supporting structures are still healing and all such symptoms typically subside gradually. 

It is incredibly dangerous to try and "tough out" a severe toothache under a crown.

If the nerve inside the tooth is infected, ignoring the pain allows the bacteria to travel down the root and into your jawbone. This leads to the formation of cysts, abscesses, and severe facial swelling. Eventually, the infection will destroy the bone, meaning the tooth cannot be saved and must be extracted.

Whether you need to resolve a post-crown infection, or you are looking to align a fully restored smile with clear aligners, having a clinical expert monitor your oral health is vital. This is why DIY, at-home aligner kits are risky - they do not take X-rays to ensure the bone beneath your crowns is healthy enough for orthodontic treatment.

• Looking at your clinical situation your dentist may advise you with a course of pain and infection medications which you must complete. 
• You may do warm saline rinses several times a day to reduce the inflammation and get rid of any food particles stuck around your crown. 
• If you have bruxism your dentist may also advise you to wear a night guard to reduce the amount of load that’s coming up on your teeth

• Brush twice daily
• Ask your dentist  to help you develop a good flossing technique around your crown
• Go for regular follow-ups

In case of any doubts, you may contact our team of specialised and highly qualified dentists who can help you relieve your pain.  

A toothache after dental crown placement should never be a mystery. While mild sensitivity is a normal part of the healing journey, throbbing, unrelenting pain is your body's way of asking for help.

Do not wait for an infection to spread to your jawbone. Book a free Whistle Smile Assessment or a diagnostic check-up at your nearest Whistle Partner Clinic today. Our specialists will take a digital X-ray, diagnose the exact source of your pain, and get you smiling comfortably again.

• Side Effects of Teeth Capping: Risks, Pain & What to Expect
• What Are The Different Types Of Crowns For Teeth?