A dental filling is one of the most common treatments to repair cavities or minor damage in a tooth. While fillings are strong and durable, they are not meant to last forever. Over time, they can weaken, wear down, or become loose—sometimes without you even noticing.

Here’s how long fillings usually last, why they may need to be replaced, and the signs that suggest it's time to visit your dentist. It also explores how regular dental visits play a key role in maintaining the health of your teeth and dental work.

How Long Do Fillings Usually Last

Dental fillings are designed to last several years, but their lifespan depends on the material used, your oral habits, and how well you care for your teeth. Here is a quick detail: 

• Amalgam (silver) fillings usually last between 10 to 15 years.
• Composite (tooth-colored) fillings usually last 5 to 10 years.
• Gold fillings may last up to 20 years or more.
• Ceramic fillings fall somewhere in between, often lasting around 15 years.

Chewing hard foods, grinding teeth, and poor brushing habits can shorten a filling's life. Even with the best care, no filling lasts forever.

Why Fillings Need Replacement

Fillings go through constant pressure from chewing and biting. Over time, this can cause cracks, leaks, or wear on the filling. When this happens, the filling no longer protects the tooth properly.

Gaps can form between the filling and the natural tooth. These spaces allow food particles, bacteria, and plaque to enter, leading to tooth decay beneath the filling. If this decay goes unnoticed, it can cause infection or even damage the tooth structure further.

In some cases, a filling may fall out completely. This leaves the tooth exposed and increases the risk of pain or damage.

The Signs That a Filling Needs to Be Replaced

Some signs are easy to spot, while others require a dental exam. Common signs include:

• Tooth sensitivity when eating hot, cold, or sweet foods
• Pain when biting down
• A visible crack or hole in the filling
• A filling that feels loose or has fallen out
• Discoloration around the filling
• Food gets stuck in the filled area

You may not always feel discomfort right away. This is why regular dental checkups are important—your dentist can detect problems before they become painful or costly.

What Happens If You Delay Replacement

Waiting too long to replace a damaged or worn-out filling can lead to serious dental problems. The decay under the filling can spread deeper into the tooth, reaching the pulp or nerves. When this happens, a root canal may be needed, or the tooth might need to be removed altogether.

Replacing a filling early helps protect the tooth and reduces the need for complex treatments later on. It also helps maintain proper chewing function and keeps your bite aligned.

The Process of Replacing a Filling

If your dentist finds that a filling needs replacement, the process is usually quick and simple. First, the old filling is removed, and the area is cleaned to get rid of any decay or debris. Then, a new filling is placed into the space and shaped to match your bite, and the process is done under local anesthesia to keep you comfortable. Depending on the material used, you can usually eat and drink within a few hours after the procedure.

Choose the Right Material for Your New Filling

If you need a replacement, your dentist may recommend a different type of filling based on your tooth’s condition, the location of the filling, and your personal preference. Composite fillings are popular for front teeth because they match the color of natural teeth. 

Amalgam or gold fillings are often used for back teeth, where strength is more important. Modern filling materials are safe, long-lasting, and more natural-looking than ever before.

Maintain Your Fillings with Good Oral Care

Good dental habits help your fillings last longer. Brush your teeth at least twice a day, floss daily, and avoid chewing on hard items like ice or pens. If you grind your teeth at night, your dentist might suggest using a night guard.

Regular checkups every six months are important. They allow your dentist to spot early signs of filling damage and take action before it leads to bigger problems.

Final Thoughts

Fillings are not permanent. They will wear out over time and may need to be replaced to keep your teeth healthy. Watch for signs like pain, sensitivity, or a loose filling, and visit your dentist regularly to catch any problems early.

By replacing fillings when needed and following good oral habits, you can avoid serious dental issues and keep your smile strong for years.

Ready to protect your smile for the long run? Schedule your appointment with our team at Gateway Family Dentistry and let our trusted team take care of your dental health, starting with a simple check of your fillings. Your comfort and care come first.