Short answer
Most fillings last somewhere between 5 and 15 years, and many last longer. We place tooth-colored composite fillings only. How long one lasts depends on the material, how big the filling is, where it sits in your mouth and how well you care for it. Regular checkups let your dentist spot a worn or leaking filling before it causes pain.
How long does each type of filling last?
Every filling eventually wears, but some materials hold up longer than others. The ranges below are typical, not guarantees. A small filling in a front tooth may outlast a large one on a back molar made of the same material.
At our office we place composite (tooth-colored) fillings only. The other materials in the table are ones you may already have from past dental work, so it helps to know how long they tend to last.
| Material | What it is | Typical lifespan | Good to know |
|---|---|---|---|
| Composite (tooth-colored) | Resin mixed with fine glass particles | About 5 to 10 years, often longer | Blends in with your tooth and bonds to it, so less healthy tooth is removed |
| Amalgam (silver) | A mix of metals | About 10 to 15 years or more | Very strong on back teeth, but dark in color; common in older fillings, and we don’t place it |
| Glass ionomer | Tooth-colored material that releases fluoride | Often 5 years or less | Usually used for small areas near the gumline; not a material we place |
| Ceramic or gold inlays | Made outside the mouth and cemented in | Often 15 years or more | Used for larger repairs; we don’t make inlays, and large repairs here are usually crowns |
If you need a new or replacement filling, we use composite. If the cavity is too large for a filling to hold up, we will explain whether a crown is the better choice. You can learn more on our dental fillings page and in our guide to tooth-colored fillings.
What makes a filling wear out faster?
A filling is a patch, and the edge where the filling meets your natural tooth is the weak spot. Anything that stresses that edge or lets bacteria in can shorten its life.
Size and location
Small fillings tend to last longer than large ones. Back teeth take most of the chewing force, so fillings there wear faster than those in front teeth. When a filling replaces more than about half of a tooth, the remaining tooth can crack around it.
New decay around the edges
Plaque that sits along the edge of a filling can cause a new cavity underneath it. This is the most common reason fillings need to be replaced. Brushing twice a day with fluoride toothpaste and cleaning between your teeth once a day helps protect those edges.
Grinding and clenching
Grinding your teeth at night puts heavy force on fillings and can chip or crack them. If you wake with a sore jaw or your teeth look flat, ask about a custom night guard.
Diet and habits
Frequent sugary snacks and acidic drinks feed the bacteria that cause decay. Chewing ice, biting pens or opening packages with your teeth can break fillings outright.
Dry mouth
Saliva helps wash away food and neutralize acid. Many medicines cause dry mouth, which raises the risk of decay around old fillings. Tell us if your mouth often feels dry.
What are the signs a filling needs to be replaced?
Sometimes a failing filling causes no symptoms at all and is only spotted on an exam or X-ray. Other times you will notice:
- Sensitivity to hot, cold or sweets in a tooth that used to feel fine
- Pain when you bite down
- A rough or sharp edge your tongue keeps finding
- Food catching in the same spot every time you eat
- A visible crack, chip or dark line around the filling
- A gap or hole where part or all of the filling has come out
A lost or broken filling is not usually an emergency, but don’t wait long. The exposed tooth can decay quickly and may break. Keep the area clean, avoid chewing on that side and call us.
What happens when a filling fails?
If the filling is worn but the tooth around it is healthy, we can usually remove it and place a new one. If decay has spread or the tooth is cracked, a bigger repair may be needed.
| What we find | Likely next step |
|---|---|
| Worn or slightly leaking filling, healthy tooth | Replace the filling |
| Large old filling with cracks in the tooth | A dental crown to hold the tooth together |
| Decay that has reached the nerve | Root canal treatment, then usually a crown |
| Tooth too damaged to save | Extraction, followed by a plan to replace the tooth |
Catching a problem early almost always means a simpler, less costly fix. Our post on fixing early cavities explains why timing matters.
How can I make my fillings last longer?
- Brush twice a day with fluoride toothpaste and clean between your teeth daily.
- Keep up with regular exams and cleanings so worn edges are spotted early.
- Wear a night guard if you grind. Guards wear out too, so check how long night guards last.
- Limit sugary snacks and sipping on soda or sports drinks.
- Don’t use your teeth as tools or chew ice and hard candy.
Cost depends on the size of the filling and how many surfaces of the tooth are involved. We give you a written estimate before treatment, and our dental prices page lists other common services. After a new filling, our filling aftercare guide explains what is normal.
When to call us
Call us if a filling falls out or breaks, if a filled tooth becomes sensitive or hurts when you bite, or if you notice a crack or food trap around an old filling. Call (832) 612-2831 — we’re open Tuesday, Wednesday and Saturday, 9am–3pm. Same-day visits for broken fillings are available during office hours when you call first.
Frequently asked questions
Not usually. If an amalgam filling is intact and the tooth is healthy, removing it means losing more tooth structure. We recommend replacing it only when it is cracked, leaking or there is decay under it.
Yes. Decay at the edge, grinding or biting something hard can loosen a filling that has been in place for years. Keep the area clean and call us to have it checked.
Replacing a filling is done with local anesthetic to numb the tooth, so you should feel pressure but not pain. The tooth may be a little sensitive for a few days afterward.
Our fillings are tooth-colored composite, which is hardened before you leave, so you can usually eat once the numbness wears off. Wait until you can feel your lip and tongue so you don’t bite them by accident.
Sources
This guide is general information, not a diagnosis. Every mouth is different — the right treatment for you depends on an exam.