What to expect — and how to make your filling last longer.
Dental fillings are one of the most common — and effective — treatments for cavities. They help restore the structure of your tooth, stop decay from spreading, and bring back normal function and appearance.
But just like any dental work, fillings aren’t forever. So how long can you expect your filling to last — and is there anything you can do to make it last longer?
Let’s take a closer look.
🔍 What Is a Dental Filling?
A dental filling is used to repair a tooth that has been damaged by decay, wear, or minor fractures. The dentist removes the damaged portion of the tooth and fills it with a restorative material, which seals and strengthens the tooth.
There are different types of materials used, and their durability can vary depending on where the filling is placed and how well you care for it.
🧪 Types of Fillings and Their Typical Lifespan
| Filling Type | Material | Average Lifespan |
|---|---|---|
| Composite (white) | Tooth-coloured resin | 5–10 years |
| Amalgam (silver) | Metal alloy | 10–15 years or more |
| Gold | Gold alloy | 15–30 years |
| Ceramic (porcelain) | Tooth-coloured ceramic | 10–15 years |
| Glass Ionomer | Resin + glass | 3–7 years (often temporary) |
🦷 Composite fillings are most commonly used in Canada today due to their natural appearance, especially for front teeth or visible areas.
🦷 What Affects the Longevity of a Filling?
Several factors can influence how long your filling lasts:
1. Location in the Mouth
Fillings on back teeth (molars) endure more bite pressure and wear faster.
Fillings on front teeth tend to last longer because they face less force.
2. Size of the Filling
Smaller fillings last longer. Larger fillings may weaken the tooth over time and are more prone to cracking.
3. Material Used
Gold and ceramic are more durable but also more costly.
Composite is aesthetic but more prone to wear, staining, or shrinkage.
4. Your Oral Hygiene
Daily brushing, flossing, and dental checkups reduce the risk of decay around the filling.
5. Diet and Habits
- Chewing ice, grinding your teeth, or eating sticky/hard foods can wear down or dislodge a filling.
- Acidic or sugary foods may contribute to decay around fillings.
⚠️ Signs Your Filling May Need Replacement
Even though fillings are durable, they don’t last forever. Watch for these signs that yours may be wearing out:
- Tooth sensitivity (especially to cold or pressure)
- Pain or discomfort when biting down
- Visible cracks or worn edges in the filling
- Food getting stuck in the same spot repeatedly
- A filling that feels loose or falls out entirely
If you notice any of the above, book a dental exam — waiting too long can lead to further decay, infection, or the need for a crown or root canal.
🛡️ How to Make Your Fillings Last Longer
- Brush twice daily with fluoride toothpaste
- Floss at least once a day
- Avoid biting hard items like pens, nuts, or ice
- Wear a nightguard if you grind or clench your teeth
- Visit your dentist every 6 months for cleanings and early detection of wear or damage
Regular checkups allow your dentist to monitor existing fillings and recommend repairs or replacements before problems arise.
Final Thoughts
Most dental fillings last anywhere from 5 to 15 years, depending on the material and how well they’re cared for. By keeping up with your oral hygiene and avoiding damaging habits, you can help your fillings — and your smile — last for years to come.
Not sure how old your filling is or if it needs replacing?
Book an exam with our team today — we’ll assess your fillings and keep your smile strong, healthy, and pain-free.