Aspenwood Dental Associates and Colorado Dental Implant Center

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How Long Do Teeth Fillings Last in Aurora, CO?

Written by the Aspenwood Dental Team

Last updated: November 11, 2026

Table of Contents

This post is general information, not advice for your own mouth. Ask your dentist whether it applies to you.

Key Takeaways

  • No dental filling lasts forever. The American Dental Association says so directly, and Cleveland Clinic gives a general range of 10 to 20 years, depending on the material used.
  • Filling size, the material, the tooth’s position, grinding and clenching, and how well the tooth is cared for all affect how long a filling stays sound.
  • Decay can start again at the edge of an old filling, and that is one of the main reasons fillings are replaced. It often cannot be seen without an exam and x-rays.
  • A filling does not need replacing just because it is old. A dentist decides based on the filling’s condition and the tooth underneath it.
A dentist in a face mask and blue gloves holds a dental mirror while a patient in the chair touches her cheek, beside the title How Long Do Teeth Fillings Last in Aurora, CO?

Dental fillings last for years, often a decade or more, but not indefinitely. The American Dental Association (ADA) states on its MouthHealthy site that no dental filling lasts forever, and Cleveland Clinic gives a general range of 10 to 20 years, depending on the material used. The range is wide because the answer depends on the tooth, the filling and the person.

That is a useful starting point and an incomplete answer. A filling that is 15 years old and in good shape may need nothing at all. A filling that is 5 years old can fail early if the tooth cracks or decay returns at its edge. At Aspenwood Dental Associates and Colorado Dental Implant Center, we check fillings against the tooth they sit in, not against a calendar.

What a filling does, and why it does not last forever

A filling replaces the part of a tooth that decay has removed. After the decayed area is cleaned out, the space is filled with a material that restores the shape of the tooth so you can chew on it again and keep bacteria out. Every day that filling takes the same bite pressure as the rest of the tooth, along with heat, cold, acid from food and drinks, and the bacteria that live in everyone’s mouth.

Over years, those forces add up. Materials wear, tiny gaps can open at the edges, and the tooth around the filling can crack. None of this means the original work was done badly. It is the ordinary reality of a small repair in a part of the body that is used several times a day.

What affects how long a filling lasts

The material

Most fillings today are tooth-colored composite resin. Older fillings are often silver amalgam. The ADA notes that composites are suited to small to mid-size fillings and have to withstand the constant stress of chewing, and that some studies show composite fillings can be less durable and need replacing more often than amalgam.

The research is more careful than that sound bite. A 2025 systematic review in the journal Operative Dentistry looked at randomized trials of larger posterior fillings and concluded that the evidence was low in quality and not enough to say either material performs better (PubMed record). A second 2025 review in Cureus (PubMed 40873828) found that amalgam appeared more durable in back teeth, and that patient factors such as oral hygiene and teeth grinding affected how long fillings lasted (PubMed record). Reading the two together, the honest summary is that material matters, and so does everything else.

Material choice is also not only about durability. Color match, the size of the cavity, how much tooth is left and where the tooth sits all play into the decision. That is a conversation to have with your dentist about your own tooth.

The size and position of the filling

A small filling on the chewing surface of one tooth is a different job from a large one that spans several surfaces of a molar. The more of the tooth a filling has to replace, the less natural structure is left to support it. The ADA describes composites as best suited to small to mid-size restorations for that reason. When too little healthy tooth remains, a dentist may talk with you about an inlay or onlay or a dental crown, which cover and support more of the tooth than a filling can. If you are weighing a crown, our post on the average cost of a crown in Aurora explains what shapes that cost.

Grinding and clenching

Biting down hard on a tooth that has a filling in it adds load, and so does grinding at night. The Cureus review above lists bruxism among the patient factors that influenced how long fillings lasted. If you wake with a sore jaw or your dentist sees flat, worn spots on your teeth, ask whether a protective appliance would help. We cover options on our occlusal and sports guards page.

Decay around the edges

Both reviews name secondary decay, which is new decay that starts at the edge of an existing filling, as a common reason fillings fail. The filling itself does not decay. The tooth next to it does, usually where plaque collects along the margin. Brushing, flossing and regular cleanings are the practical defense, and that part is in your hands as much as ours.

Chewing habits

Ice, hard candy, pen caps and fingernails are tough on fillings and on natural enamel alike. The ADA’s own description of composite fillings stresses the constant pressure of chewing, so it is reasonable to go easy on anything you would not want to bite on with a chipped tooth.

Signs a filling needs a second look

Some problems announce themselves. Others do not. These are the signs that are worth a call:

  • A filling that has broken, chipped or come out. Cleveland Clinic advises contacting your dentist right away if a filling breaks.
  • Pain when you bite down. Cleveland Clinic notes that pain on biting can often be fixed by reshaping the filling.
  • Sensitivity to hot, cold or sweet foods around one particular tooth.
  • A rough edge you can feel with your tongue, or a spot where floss shreds or catches.
  • A dark line or shadow at the edge of the filling, or a visible gap.
  • A throbbing toothache. Cleveland Clinic says this can mean decay has reached the pulp, and that once it has, a filling will not fix the problem. For a broken filling after hours, see what to do in a dental emergency.

The reverse is also true. Many failing fillings cause no symptoms at all, which is why checkups and dental x-rays matter. A cavity growing under or beside an old filling is often found on an x-ray before you feel anything.

When a tooth needs more than a new filling

If decay has reached the soft tissue inside the tooth, Cleveland Clinic explains that a filling will not solve the problem, and the tooth may need root canal treatment instead. Swelling of the face or jaw, a fever, or pain that medicine does not ease are reasons to be seen promptly. See our page on dental emergencies for what to do, and go to an emergency room if you have trouble breathing or swallowing. Our guide to the signs you may need a root canal explains what to look for.

Replace, repair or leave it alone?

Age by itself is not a reason to replace a filling. What matters is whether the filling is still sealed against the tooth, whether the tooth around it is sound, and whether there is new decay. A dentist decides this by examining the tooth, looking at x-rays and comparing the filling over time.

In some cases, a partially fractured composite filling can be repaired instead of fully replaced. Researchers have compared repair with replacement in a 2025 systematic review. Whether that option fits your tooth is something to settle at an exam, because it depends on how much of the filling is damaged and what is happening underneath.

The same goes for old silver fillings. People sometimes ask about replacing them for appearance or because they worry about them. Having a filling that is sound and has no decay under it replaced just because it is old is a decision to make with your dentist, with the pros and cons in front of you. A good dentist will tell you when waiting is a reasonable choice.

How to help your fillings last

  • Brush twice a day and clean between your teeth daily, paying attention to the line where the filling meets the tooth.
  • Keep up with regular dental cleanings and exams so small changes are caught early.
  • Treat grinding and clenching instead of ignoring them.
  • Avoid biting on ice, hard candy and other very hard items.
  • Call about a rough edge, a chip or new sensitivity when you notice it, not months later.

How Aspenwood checks fillings in Aurora

If you are new to us, your first visit is a complimentary consultation. You meet with a dentist for a real conversation first, and then we examine your teeth, take the images that are warranted and explain what we see in plain language. Our approach to tooth-colored fillings, part of our general dentistry care, starts with an examination, so you hear what the tooth needs before any treatment is planned.

Before anything is scheduled, you will know what is recommended and why, and how payment works. Our financial information page and membership plan set out the options. If you want to know what to expect at a first appointment, read about your first visit.

Frequently Asked Questions

How long do tooth-colored fillings last?

It varies. The American Dental Association says no dental filling lasts forever, and some studies show composite fillings can need replacing more often than amalgam. Cleveland Clinic gives a general range of 10 to 20 years for fillings, depending on the material. The size of the filling, grinding, home care and decay at the edges all play a part, so a dentist has to judge the specific tooth.

Does a filling need to be replaced when it gets old?

Not automatically. A filling that is intact, sealed at the edges and free of decay underneath can stay in place. A dentist decides by examining the tooth and the x-rays, and comparing them with earlier records.

What are the signs that a filling is failing?

Common signs include a chip, crack or missing piece, pain when biting, sensitivity around one tooth, a rough edge, a visible gap or a dark line at the margin. Some failing fillings cause no symptoms and are found on an x-ray, which is why regular checkups matter.

Can a tooth get a cavity under an old filling?

Yes. Decay can start at the edge of an existing filling or work its way underneath. It is one of the main reasons fillings are replaced, and it is often found on an x-ray before it hurts.

Is it better to have a crown instead of a large filling?

It depends on how much healthy tooth is left. When a tooth has too little structure to support a large filling, a dentist may discuss an inlay, onlay or crown. That decision comes from examining the tooth, not from a rule that applies to everyone.

What should I do if a filling comes out?

Call your dentist right away. Cleveland Clinic advises contacting a dentist if a filling breaks. Keep the area clean, avoid chewing on that side, and go to an emergency room for swelling of the face or jaw, fever, or trouble breathing or swallowing.

Not sure about an old filling?

Book a visit and we will check the filling, the tooth and the x-rays, and explain every option before anything is scheduled. Reach us through the contact page or call (303) 529-2913. If you have facial swelling, a fever or trouble breathing or swallowing, go to an emergency room.

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