How Long Should a Filling Last Before It Needs Replacing?
Sep 18, 2025
How Long Should a Filling Last Before It Needs Replacing?
At La Mirada One Dental, we often get asked: “How long will my filling last?” The truth is, there isn’t a one-size-fits-all answer. The lifespan of a dental filling depends on several factors—including the material used, how well it was placed, your oral habits, and how you care for it. Let’s walk through what you can expect and what to watch out for.
What Influences Filling Longevity
A filling’s durability depends on:
Material type – Some materials are more wear-resistant than others.
Size and location of the filling – Fillings on molars or teeth used for heavy chewing tend to undergo more stress.
Oral hygiene habits – Brushing, flossing, defending against decay.
Diet and habits – Sugary foods, acidic drinks, teeth grinding (bruxism), chewing ice or hard objects.
Regular dental checkups – Being monitored allows early detection of issues before they become bigger.
Signs Your Filling May Need Replacing
These are red flags that suggest your filling might be failing or nearing the end of its useful life:
Sensitivity or pain — especially when eating hot, cold, sweet, or biting down.
Visible cracks, chips, or breaks in the filling or around it.
Discoloration or dark lines at the edges of the filling.
Roughness or wear — the filling may start to lose its shape.
Leakage or gaps — if the seal between the tooth and the filling is compromised, decay can develop underneath.
Filling feels loose or the tooth feels different when chewing.
Recurring decay around the edges of an old filling.
What Happens When a Filling Fails
Bacteria can enter under the filling and create decay which is more difficult to treat.
The structural integrity of the tooth may weaken, possibly requiring more extensive restoration (e.g. crown, root canal).
Discomfort can worsen or sensitivity can increase.
How to Prolong the Life of Your Fillings
At La Mirada One Dental, we recommend these practices to help your fillings last longer:
Brush twice daily with fluoride toothpaste and floss daily.
Maintain regular dental cleanings and checkups (usually every 6 months).
Limit sugary and acidic foods and drinks.
Avoid habits like chewing ice, biting nails, or chewing hard objects.
If you grind or clench your teeth (especially at night), ask about a night guard.
Promptly address any signs of trouble rather than waiting.
When It’s Time to See the Dentist
If any signs above show up, or if it's been many years since your last exam, call us. We’ll evaluate your filling, possibly take X‑rays, and help you decide whether a replacement or other treatment is the best path.
At La Mirada One Dental — Our Approach
We believe in balancing durable, high‑quality materials with aesthetic results. When we place fillings, we ensure:
Proper technique and fully sealing margins.
Matching material to the tooth type, location, and bite forces.
Monitoring and maintenance over time to catch problems early.
Our goal is for your fillings not just to last, but to give you comfort, function, and beauty for as long as possible.
Conclusion
Fillings are durable, but they do not last forever. Depending on material, location, and oral care, a filling may last anywhere from 5 to 30 years. Keeping up with good dental hygiene and regular dental visits helps ensure you get close to the upper end of that range. At La Mirada One Dental, we’re here to help you monitor your restorations and make decisions when the time is right.
Feel free to book appointment now