How Long Can A Tooth Filling Last?

Tooth fillings are a common dental treatment used to restore teeth affected by decay, fractures, or wear. If you have ever had a filling, you might wonder how long it will last before it needs a replacement. Most dental fillings last between 5 to 15 years, depending on factors like the filling material, location, and oral hygiene habits. Regular dental check-ups can help monitor your fillings and ensure they remain in good condition.

Fillings play a crucial role in protecting your teeth from further decay and damage. Understanding the types of fillings, how long they last, and when they need to be replaced can help you maintain your dental health and avoid more invasive treatments. If you are concerned about a worn filling, scheduling a visit with your family dentist can provide peace of mind.

What is a Tooth Filling?

Tooth fillings or dental fillings are typically required when a part of the tooth structure, damaged by decay, is removed. Fillings involve cleaning the cavity to remove decayed tissue, then filling the resulting empty space with a material that restores the tooth’s form and function. 

If a cavity is left untreated, it can become bigger, leading to pain and possible tooth loss. Signs of a cavity can include the following:

• Toothache
• Tooth sensitivity
• Tooth pain
• Noticeable holes
• Pits in the tooth

What Affects the Longevity of a Tooth Filling?

The lifespan of a filling depends on several key factors, including the material used, oral hygiene, and lifestyle habits.

The Type of Filling Material

Different filling materials have varying durability:

• Composite resin fillings – Tooth-coloured and aesthetically pleasing, composite fillings may last 5–15 years.
• Amalgam fillings – Made of a blend of metals, amalgam fillings are durable and may last 10–15 years.
• Gold fillings – Highly durable, can last 15–30 years, but they are more expensive.
• Ceramic fillings (porcelain) – Resistant to stains and wear, these can last 10–15 years.
• Glass Ionomer fillings – Common in children’s dentistry, these last 5–7 years and release fluoride to protect teeth.

Oral Hygiene Habits

Brushing twice a day, flossing daily, and visiting your dentist for regular cleanings and check-ups help extend the life of your fillings. Neglecting oral hygiene can cause decay around the filling, dramatically shortening its lifespan.

Size and Location of the Filling

Fillings in high-pressure areas, like molars, experience more wear and tear and may not last as long as those in front teeth. Larger fillings are also more susceptible to breaking down.

Teeth Grinding & Clenching

Grinding or clenching (bruxism) your teeth can weaken fillings over time. A custom night guard can protect your teeth and fillings from excessive wear.

Diet & Lifestyle Choices

Eating hard, sticky, or acidic foods can weaken fillings, causing them to wear down or even break over time. Crunching down on ice, chewing hard candies, or eating tough foods like popcorn kernels can put excessive pressure on fillings, leading to cracks or dislodgement. 

Additionally, habits like chewing ice, biting nails, or using your teeth to open packaging can cause stress fractures in both natural teeth and fillings. Making small adjustments to your diet and being mindful of how you use your teeth can help prolong the lifespan of your dental work.

Regular Dental Visits

Routine dental check-ups help identify potential issues early, allowing for timely intervention before a small problem becomes a major concern. Your dentist will monitor your fillings for signs of wear, fractures, or decay, ensuring they continue to protect your teeth effectively. 

Regular cleanings also help prevent cavities from forming around fillings, reducing the likelihood of needing further restorative treatments. By scheduling check-ups every six months, you can maintain a healthy, long-lasting smile.

Signs That a Filling Needs to Be Replaced

Even well-maintained fillings eventually wear out. Look for these warning signs that indicate it is time for a replacement:

• Pain or sensitivity: If you experience tooth sensitivity or pain when eating or drinking, especially with hot, cold, or sweet foods, your filling may be deteriorating.
• Visible wear or damage: A cracked, chipped, or discoloured filling is a sign that it is no longer protecting your tooth effectively.
• Rough or sharp edges: If your filling feels rough or jagged, it may be breaking down, increasing the risk of decay and discomfort.
• Food getting stuck in the tooth: If food frequently gets trapped around a filling, it could indicate a gap or breakdown in the material, leading to further decay.
• Persistent bad breath or unpleasant taste: A damaged filling can trap bacteria and food particles, causing chronic bad breath or a bad taste in your mouth.

If you notice any of these symptoms, schedule an appointment with your dentist to assess your filling and determine if it needs to be replaced.

What Happens If You Do Not Replace a Worn Filling?

Delaying the replacement of a damaged filling can lead to serious dental issues, including:

• Tooth decay beneath the filling: Bacteria can seep into the tooth, leading to further decay and potential infection.
• Cracked or fractured teeth: A failing filling weakens the tooth, increasing the risk of cracks or fractures.
• Tooth infections: If decay reaches the inner tissue (pulp), a root canal or even extraction may be necessary.

Timely filling replacement is key to preventing more invasive and costly dental procedures.

How to Extend the Life of Your Fillings

To keep your dental fillings in top condition and avoid the need for early replacements, follow these best practices:

Maintain Excellent Oral Hygiene

A strong oral hygiene routine is key to preventing new cavities and keeping existing fillings intact. Make sure to:

• Brush at least twice a day with a fluoride toothpaste to strengthen enamel and protect against decay.
• Floss daily to remove plaque and food particles from between teeth, especially around the edges of fillings.
• Use an alcohol-free mouthwash to help eliminate bacteria without drying out your mouth (a dry mouth can lead to other dental issues).

Visit Your Dentist Regularly

Routine dental check-ups allow your dentist to monitor the condition of your fillings and catch any signs of wear, cracking, or leakage early.

• Regular cleanings remove plaque and tartar buildup, reducing the risk of decay around fillings.
• If it has been a while since your last visit, schedule an appointment to ensure your fillings are still providing full protection.

Avoid Hard & Sticky Foods

Certain foods can put excess pressure on fillings, leading to fractures or dislodgement. To prevent damage:

• Limit hard foods like ice, unpopped popcorn kernels, and hard candies, which can cause fillings to crack or break.
• Reduce sticky foods like caramel, toffee, and chewing gum, which can pull fillings loose or create gaps where bacteria can enter.
• If you do indulge in these foods, chew carefully and avoid biting down too hard.

Wear a Night Guard If You Grind Your Teeth

Bruxism, or teeth grinding, puts tremendous pressure on fillings, leading to premature wear or breakage. If you grind your teeth at night:

• Consider a custom night guard to protect your fillings and natural teeth from excessive force.
• If you experience jaw pain, morning headaches, or worn-down teeth, talk to your dentist about solutions to reduce grinding.

Reduce Acidic & Sugary Foods

Acidic and sugary foods weaken tooth enamel and increase the risk of decay around fillings. To minimize their effects:

• Limit consumption of citrus fruits, soft drinks, and vinegary foods, all of which can erode the edges of fillings.
• Drink water or rinse your mouth after consuming acidic or sugary foods to help neutralize acids and wash away lingering particles.
• Choose tooth-friendly snacks, such as cheese, nuts, and crunchy vegetables, to support enamel health.

Replace Fillings Before They Fail

Waiting too long to replace a damaged filling can lead to more serious dental issues, such as deep decay, infections, or even tooth loss.

• If your dentist notices signs of wear, cracks, or leakage, it’s best to replace the filling before it fails completely.
• Proactive treatment can prevent costly and painful complications, such as needing a root canal or a dental crown.

By following these steps, you can prolong the lifespan of your fillings, protect your teeth, and maintain excellent oral health for years to come. If you are unsure about the condition of your fillings, book a check-up with your dentist.

Protect Your Smile with Expert Dental Care

While tooth fillings can last anywhere from 5 to 15 years, their longevity depends on the material, daily habits, and regular dental care. By maintaining good oral hygiene, avoiding harmful habits, and scheduling regular dental check-ups, you can extend the lifespan of your fillings and protect your teeth from further damage.