Tooth Sensitivity After Filling? Learn Why It Happens and What to Do

Experiencing tooth sensitivity after filling a cavity? You’re not alone, and you’re definitely not imagining it. Many patients in Edmonton experience discomfort or sensitivity following a filling.

While it can feel worrisome, it’s often a normal part of the healing process. Still, understanding what causes this sensitivity and when to see your dentist can make all the difference.

Let’s break down why your tooth might be sensitive after a filling, how long that sensitivity typically lasts, and most importantly, what you can do about it.

Understanding Tooth Sensitivity After a Dental Filling

Tooth sensitivity following a filling procedure can be frustrating, especially if you expected everything to be all better after getting your cavity treated. But the truth is, sensitivity is common.

Why Does a Tooth Be Sensitive After a Filling?

Tooth sensitivity occurs because the tooth is adjusting after some level of stress. Whether from the removal of decay, irritation of the nerve (pulp), or placement of a new filling, your tooth needs time to heal. Temporary sensitivity or pain and sensitivity can develop due to:

• Exposure of the dentin (the layer under your enamel)
• Slight inflammation within the pulp
• The type of filling material used
• A high filling that alters your bite
• Pressure on the tooth when chewing

Causes of Tooth Sensitivity After a Filling

Let’s walk through what causes tooth sensitivity:

• Pulp inflammation – The pulp is the nerve inside the tooth. During a filling, heat and vibration from the dental drill can irritate this area.
• Exposed dentin – When tooth enamel is thin or removed due to decay, dentin becomes exposed. This can trigger sensitivity to hot or cold food and drink.
• High filling – If the filling is higher than the surrounding tooth surface, it can affect your bite, causing pressure and irritation.
• Filling material – Metal (such as amalgam) and dental composite materials react differently to temperature. Metal can conduct heat or cold more than composite.
• Allergy or sensitivity – Although rare, some people may react to the materials in a new filling.

How Long Does Sensitivity Typically Last?

Sensitivity typically lasts a few days to a few weeks. Here’s what you should expect:

• Mild tenderness and sensitivity when biting or chewing – should fade within a few days
• Sensitivity to hot or cold temperatures – can linger for two to four weeks
• If sensitivity persists beyond four weeks or worsens, it’s time to visit your dentist

The duration of sensitivity varies depending on the severity of tooth decay, the affected tooth, the filling material used, and how your body heals.

Is It Normal for Teeth to Be Sensitive After a Filling?

Yes, sensitivity is normal, especially right after the placement of a filling. Your teeth and nerves are adjusting to the dental restoration, and in most cases, the tooth will heal over time.

But there’s a point when sensitivity does not subside within the expected timeframe. If you’re still experiencing tooth sensitivity after filling a cavity beyond four weeks, that could signal something more serious.

When to Be Concerned About Sensitivity After a Dental Filling

Persistent or severe sensitivity after a dental filling should not be ignored. Be aware of these signs and symptoms:

• Sharp tooth pain when chewing or biting down
• Increased sensitivity that gets worse or doesn’t improve within two to four weeks
• Swelling or inflammation around the tooth or gums
• Pain and sensitivity spreading to other parts of the mouth or face

If you notice any of the above, reach out to your Edmonton dentist. A filled tooth should gradually feel more comfortable, not more painful.

Common Complications That May Trigger Sensitivity

Sometimes sensitivity signals an issue with the filling itself:

High Filling

A filling that’s higher than the surrounding tooth can alter how your teeth come together and put too much pressure on the tooth. In this case, your dentist may need to adjust or replace the filling.

Cracked or Broken Filling

If a filling breaks or develops a leak, it can expose the internal part of the tooth to bacteria, air, and temperature changes. This can lead to pulpitis or even infection.

Pulp Damage or Infection

Severe tooth decay or trauma during the filling procedure can injure the nerve inside the tooth. If inflammation or infection sets in, root canal therapy may be necessary.

Learn more about root canal therapy and how it can help save an affected tooth.

Tips to Manage Tooth Sensitivity at Home

While it’s always best to speak directly with your dentist, you can try a few at-home strategies to manage temporary discomfort after a dental procedure:

• Use desensitizing toothpaste – Look for toothpaste with potassium nitrate or tin(II) fluoride, ingredients that target tooth nerves.
• Switch to a soft-bristle toothbrush – Gentle brushing reduces irritation to both teeth and gums.
• Avoid extreme temperatures – Skip ice cream or hot coffee that could trigger sensitivity to hot or cold.
• Chew on the opposite side – Give your treated tooth a break as it adjusts to the new filling.
• Use over-the-counter analgesics – Ibuprofen or paracetamol can manage inflammation and pain. Always take medications as directed.
• Stay away from sticky or hard foods – These can damage a new filling or aggravate a sensitive tooth.

What to Expect Over Time

In most cases, sensitivity resolves gradually. Here’s a typical healing timeline:

• Within a few days: Mild sensitivity with chewing or temperature changes
• Two to four weeks: Treated tooth adjusts to the new filling
• Beyond four weeks: If pain or sensitivity persists, visit your dentist

Remember, fillings are designed to protect the tooth enamel and inner structure, not irritate it long-term. If your sensitivity worsens, it’s not something to just wait out; it needs professional attention.

When to Return to Your Dentist

If your tooth still hurts or remains sensitive long after the expected window, it’s time to act. A dentist can assess for causes of sensitivity such as:

• High filling
• Pulpitis
• Underlying infection
• Cracked filling
• New tooth decay

They may take X-rays to look inside the tooth, apply a protective coating, replace the filling, or perform a root canal if needed.

Preventing Sensitivity Going Forward

The best way to avoid post-filling complications starts with proper oral hygiene and regular checkups. Your Edmonton dentist can also offer personalized guidance based on your history of sensitive teeth or previous fillings.

• Brush twice daily with a fluoride toothpaste
• Floss daily with care to avoid gum recession
• Use alcohol-free mouthwash
• Avoid overuse of whitening products that can weaken enamel
• Maintain regular dental visits for cleaning and exams

Dental fillings are safe and effective, but like with any dental procedure, some temporary sensitivity is possible. With the right care and advice from your dentist, you’ll be back to comfortable chewing in no time.

Final Thoughts: Is Tooth Sensitivity After Filling Cause for Concern?

Tooth sensitivity after a filling is common, and in most cases, nothing to worry about. However, understanding tooth sensitivity and what causes tooth sensitivity can help you respond if discomfort after a filling hangs around too long.

Most people feel better within a few days or weeks as the tooth adjusts to the new filling. But if sensitivity persists, worsens, or becomes severe sensitivity, it’s worth seeking professional advice. Your Edmonton dentist is here to help, and that filled tooth could just need a small tweak to feel right again.

If you’re experiencing tooth sensitivity following a filling or have questions about dental fillings, don’t wait; schedule a visit today. The sooner you get the attention your mouth needs, the sooner you’ll feel that sweet relief.

Keep smiling, and don’t let a sensitive tooth get in the way of a healthy grin.