How Long Does a Dental Filling Last?
Dental fillings are one of the most common and effective ways to restore teeth affected by decay or minor damage. If you’ve been told you need a filling (or already have one) it’s natural to wonder how long a dental filling will last and what you can expect over time.
While dental fillings are designed to be durable, they are not permanent. Their lifespan depends on several factors, including the type of material used, the size and location of the filling, and how well the tooth is cared for afterward.
In this blog, we explain how long different fillings typically last, what affects their longevity, and how to look after your teeth following dental filling treatment.
What Is a Dental Filling?
A dental filling is a restorative treatment used to repair a tooth that has been damaged by decay, wear or minor fractures. After removing the affected portion of the tooth, the dentist fills the space with a suitable material to restore shape, strength and function.
The goal of dental filling treatment is to:
- Stop decay from progressing
- Restore normal chewing function
- Protect the tooth from further damage
- Maintain overall oral health
Fillings are a routine part of preventive and restorative dental care.
How Long Do Dental Fillings Last on Average?
There is no single answer to how long a filling will last, as outcomes vary between individuals. However, general timeframes can be helpful.
As a general guide:
- Some fillings may last 5–7 years
- Others may last 10–15 years or longer
Regular dental check-ups are essential, as fillings can wear or fail gradually without causing immediate symptoms.
Types of Dental Fillings and Their Longevity
The type of filling material plays a significant role in how long it may last. Your dentist will recommend an option based on the tooth’s location, function and your individual needs.
Composite (Tooth-Coloured) Fillings
Composite fillings are made from a resin material that blends with natural tooth colour. They are commonly used for visible teeth.
- Typical lifespan: around 5–10 years
- Advantages: natural appearance, bonds well to tooth
- Considerations: may wear faster in high-biting areas
Amalgam (Silver) Fillings
Amalgam fillings are made from a mixture of metals and have been used for many decades.
- Typical lifespan: 10–15 years or more
- Advantages: strong and durable
- Considerations: more noticeable in appearance
Glass Ionomer Fillings
These are often used in areas with low biting pressure or in children’s teeth.
- Typical lifespan: shorter than composite or amalgam
- Advantages: releases fluoride
- Considerations: less durable
There is no single best dental filling material for every situation. Suitability depends on the tooth, bite forces and long-term oral health goals.
Factors That Affect How Long a Filling Lasts
Several factors influence the longevity of dental fillings:
Location of the Filling
Fillings in molars experience more chewing pressure and may wear faster than those in front teeth.
Size of the Filling
Larger fillings tend to have a shorter lifespan, as less natural tooth structure remains to support them.
Oral Hygiene
Consistent brushing, flossing and professional cleaning help prevent decay around the filling edges.
Diet and Habits
Frequent sugary foods, acidic drinks, teeth grinding or biting hard objects can shorten a filling’s lifespan.
Signs a Dental Filling May Need Replacement
Fillings do not always fail suddenly. Warning signs may include:
- Sensitivity to hot, cold or pressure
- Pain when chewing
- Rough or chipped edges
- Visible cracks or discolouration
- Food trapping around the filling
Early assessment allows your dentist to address issues before further damage occurs.
What Happens When a Filling Wears Out?
When a filling begins to fail, bacteria can enter the gap between the filling and the tooth. This may lead to further decay or structural weakness.
Depending on the situation, your dentist may recommend:
- Replacing the filling
- Repairing a small section
- Considering a crown if the tooth is significantly weakened
Prompt care helps preserve the natural tooth for as long as possible.
How to Make Dental Fillings Last Longer
You can help extend the lifespan of your fillings by:
- Brushing twice daily with fluoride toothpaste
- Cleaning between teeth every day
- Limiting sugary and acidic foods
- Wearing a night guard if you grind your teeth
- Attending regular dental check-ups
According to a research study, good oral hygiene and preventive care significantly improve the longevity of dental restorations.
Making Informed Decisions About Fillings
Understanding how long do dental filling last helps set realistic expectations. While fillings are not permanent, they are an effective and reliable way to restore teeth when monitored and maintained appropriately.
At Blue Gum Dental, we tailor our dental filling treatment to suit each patient’s needs, considering comfort, function and long-term oral health. We also guide patients in choosing suitable materials and maintaining their restorations over time.
Schedule a consultation today for personalised advice and care for your dental fillings.
Frequently Asked Questions
1. How long do dental fillings usually last?
Dental fillings can last anywhere from several years to over a decade. Longevity depends on the material used, tooth location and oral care habits.
2. What is the best dental filling material?
There is no single best dental filling material for everyone. The most suitable option depends on the tooth, biting forces, appearance preferences and clinical needs.
3. Can a dental filling last forever?
No. Dental fillings are not permanent and may eventually need repair or replacement due to wear or changes in the tooth.
4. Do tooth-coloured fillings last as long as silver fillings?
Tooth-coloured composite fillings generally last slightly less time than amalgam fillings, especially in high-pressure areas, but they offer aesthetic benefits.
5. Is replacing a filling painful?
Replacing a filling is usually straightforward and performed under local anaesthetic, making it comfortable for most patients.
6. What happens if a filling is left too long?
A worn or damaged filling can allow decay to develop underneath, potentially leading to more extensive treatment.
7. How can I tell if my filling is failing?
Sensitivity, pain when chewing, rough edges or visible cracks may indicate a problem. A dental check-up is the best way to assess it.
8. How often should fillings be checked?
Fillings are typically assessed during routine dental check-ups, allowing early detection of wear or damage.