Dental fillings are essential for treating cavities and preserving tooth structure—but they don’t last forever. Over time, fillings can wear down, crack, or even fall out, leaving your teeth vulnerable to further decay or damage. So how do you know when it’s time to replace dental fillings? In this blog, we’ll cover the lifespan of different types of fillings, warning signs to watch for, and how your dentist determines when a replacement is necessary.
TLDR Quick Guide
- Fillings can wear out, crack, or loosen over time
- Signs you may need to replace dental fillings include sensitivity, pain, visible damage, or recurring decay
- Regular dental exams help detect problems early
- Replacing old fillings prevents bigger issues like infections or tooth fractures
- Most fillings last 5–15 years depending on the material and care
How Long Do Dental Fillings Last?
The lifespan of a filling depends on the material used, your oral hygiene, and bite pressure.
Filling Material | Average Lifespan |
Composite (Tooth-colored) | 5–10 years |
Amalgam (Silver) | 10–15 years |
Gold | 15+ years |
Ceramic or Porcelain | 10–20 years |
Even the most durable fillings eventually break down due to chewing pressure, temperature changes, and time.
Top Signs It’s Time to Replace Dental Fillings
1. Tooth Sensitivity
Increased sensitivity to hot, cold, or sweet foods may signal a filling has worn down or separated from the tooth.
2. Pain or Discomfort
Persistent discomfort when biting or chewing can indicate:
- A loose filling
- An underlying cavity beneath the filling
- Cracks in the tooth or restoration
3. Visible Damage
If you can see:
- Cracks or chips in the filling
- A dark line around the edges
- A piece of the filling missing
—it’s time for a replacement.
4. Staining or Discoloration
Composite fillings may darken or stain over time, especially with coffee, tea, or tobacco use.
5. Recurrent Decay
Decay can form underneath an old filling. Your dentist may detect this on X-rays or during a physical exam.
Why Replacing Old Fillings Matters
Delaying replacement of a damaged filling can lead to:
- Bacterial leakage beneath the restoration
- Larger cavities
- Root canal infections
- Tooth fractures or loss
Early replacement helps avoid more invasive (and expensive) treatments later.
What Happens During a Filling Replacement?
- Your dentist examines the filling and takes an X-ray if needed
- The old filling is removed, and decay (if any) is cleaned out
- A new filling is placed—usually matched to the tooth’s color
- The bite is checked and adjusted for comfort
The entire process is typically completed in a single visit.
How to Extend the Life of Your Fillings
- Brush and floss daily to prevent new decay
- Avoid chewing hard objects (ice, pens, etc.)
- Wear a night guard if you grind your teeth
- Visit your dentist twice a year for checkups
- Minimize acidic and sugary foods that weaken enamel
Key Takeaways
- Dental fillings have a limited lifespan and need replacement over time
- Signs like sensitivity, pain, cracks, or visible wear should never be ignored
- Regular exams help catch problems before they turn into serious dental issues
- Replacing fillings is a simple process that protects your long-term oral health
- Modern materials make replacements more durable and aesthetically pleasing