A dental filling repairs a tooth damaged by decay or a minor fracture. The dentist removes the decayed portion of the tooth, cleans the area, and fills the space with a durable material — most often tooth-colored composite resin — restoring the tooth’s shape and function in a single visit.
Inside this article
- What is a dental filling?
- How do dental fillings work?
- What are the different types of dental fillings?
- Which type of dental filling is the safest?
- How long do dental fillings last?
- Why do dental fillings fall out?
- How much do dental fillings cost?
- Does dental insurance cover fillings?
- Do dental fillings hurt?
- Dental fillings for children
- How can you avoid needing a filling?
- Frequently asked questions
What Is a Dental Filling?
A dental filling is a restoration that repairs a tooth after decay or a small fracture has damaged it. Once the damaged tissue is removed, the filling material takes its place, sealing the tooth against further decay and rebuilding enough structure for the tooth to bite and chew normally again.
Fillings are the most common repair in restorative dentistry, the branch of dental care focused on repairing damaged teeth and replacing missing ones. Catching decay while a filling is still enough to fix it — before it reaches the point of needing a crown or a root canal — is one of the central reasons routine exams matter.
How Do Dental Fillings Work?
A filling works by removing decay and replacing the lost tooth structure with a material that bonds to or seals the tooth. Dental fillings follow a simple process:
- Numbing. The dentist applies a local anesthetic so the tooth and surrounding area are fully numb before any work begins.
- Removing the decay. The decayed portion of the tooth is cleared away, leaving only healthy structure behind.
- Cleaning the space. The area is cleaned to remove bacteria and debris so the filling bonds to a clean surface.
- Placing the filling. The material is layered into the space and shaped to match the tooth’s natural contours.
- Curing and polishing. Composite fillings are hardened with a curing light, then the filling is adjusted for a comfortable bite and polished smooth.
Most single fillings are finished in one visit. If a tooth is bothering you, our team at Tulsa Dental Center places dental fillings daily and can usually treat the tooth in a single appointment.
What Are the Different Types of Dental Fillings?
Dental fillings are made from five main materials, each with a different balance of durability, appearance, and cost. The right one depends on where the tooth sits in your mouth, how much structure was lost, and whether you want the repair to be invisible.
Composite Resin
Tooth-colored resin that bonds directly to the tooth and blends with the surrounding enamel. It’s the most common choice today and the standard for teeth that show when you smile.
Amalgam
A silver-colored alloy of metals known for strength and long service life. Amalgam is typically reserved for back teeth, where the darker color is out of sight and heavy chewing forces demand a tough material.
Gold
Cast gold is the most durable filling material available and can last for decades. It’s rarely chosen now because of its cost and appearance, but it remains the longest-lasting option.
Porcelain / Ceramic
Tooth-colored ceramic that resists staining and is often used for larger restorations like inlays and onlays. It’s fabricated to match your tooth and cemented into place.
Glass Ionomer
A material that releases fluoride over time, used for small fillings, areas below the gumline, and children’s teeth. It’s less durable than the others and is chosen for specific situations rather than heavy-load surfaces.
Which Type of Dental Filling Is the Safest?
Every filling material a dental office uses today is considered safe. The most common concern patients raise is the mercury in amalgam fillings, but the mercury in amalgam is bound within a stable alloy, and the evidence does not support the idea that amalgam fillings harm the general population.
Composite resin is often preferred over amalgam, but the reason is appearance and the ability to bond to the tooth — not a safety problem with amalgam. Certain groups, including pregnant patients and very young children, may be advised to favor alternatives to new amalgam fillings as a precaution, and our team can walk you through the best material for your specific situation.
How Long Do Dental Fillings Last?
How long a filling lasts depends mostly on the material and on how well the tooth is cared for afterward. These are the typical service lives for each type:
| Filling Material | Typical Lifespan |
|---|---|
| Composite resin | 5–10 years |
| Amalgam | 10–15 years |
| Gold | 15–30 years |
| Porcelain / ceramic | 10–15 years |
| Glass ionomer | ~5 years |
Good oral hygiene, regular cleanings, and avoiding habits like grinding or chewing ice all extend the life of a filling. Grinding and clenching are among the fastest ways to wear a filling down or crack it early.
Why Do Dental Fillings Fall Out?
Dental fillings fall out when the seal between the filling and the tooth breaks down. A well-placed filling should last for years, but that seal can fail early for several reasons:
- New decay forming around the edge of the filling, breaking the seal
- Grinding or clenching that stresses the bond over time
- Biting down on something hard, like ice or a popcorn kernel
- A very large filling with little healthy tooth left to hold it
- Normal wear finally catching up with an older filling
A filling that falls out isn’t an emergency in most cases, but the exposed tooth is vulnerable and sensitive, so it should be looked at promptly before decay sets back in.
How Much Do Dental Fillings Cost?
The cost of a filling depends on the material, the size of the cavity, and how many surfaces of the tooth need repair. A small composite filling on a front tooth costs far less than a large ceramic inlay on a molar. These are typical ranges before insurance:
| Filling Material | Typical Cost Per Filling |
|---|---|
| Amalgam | $100–$300 |
| Composite resin | $150–$450 |
| Glass ionomer | $90–$300 |
| Gold | $500–$1,500+ |
| Porcelain / ceramic | $500–$1,500+ |
Larger fillings and back teeth with multiple surfaces sit at the higher end of each range. An exam is the only way to know exactly which material and size a tooth needs.
Does Dental Insurance Cover Fillings?
Most dental insurance plans cover fillings, usually classifying them as basic restorative care and paying a significant share of the cost after your deductible. Coverage commonly lands in the range of 70 to 80 percent, though the exact figure varies by plan.
One detail catches patients off guard: some plans cover composite fillings only up to what an amalgam filling would have cost, leaving you to pay the difference for the tooth-colored material on back teeth. Checking the specifics of your plan before treatment is the best way to avoid a surprise, and our front-desk team can help you understand what your plan covers.
Do Dental Fillings Hurt?
Getting a filling should not hurt. The tooth is fully numbed with local anesthetic before the dentist begins, so what you feel during the procedure is pressure and movement rather than pain.
It’s normal for the tooth to be sensitive to hot, cold, or pressure for a few days afterward as it settles. That sensitivity fades on its own; if it lingers beyond a week or two or turns into a sharp pain when you bite, the filling may need a small adjustment.
Dental Fillings for Children
Children get fillings for the same reason adults do — to stop decay before it spreads — and treating cavities in baby teeth matters even though those teeth eventually fall out. A decayed baby tooth can cause pain and infection, and losing it too early can crowd the permanent teeth trying to come in behind it.
Fillings for children are usually composite resin or glass ionomer, and glass ionomer’s slow fluoride release makes it a common choice for young patients. When a baby tooth has extensive decay, a small crown sometimes protects it better than a filling until the tooth is ready to come out naturally.
How Can You Avoid Needing a Dental Filling?
Most cavities are preventable, and the habits that stop decay are the same ones that keep the rest of your mouth healthy. To lower your odds of needing a filling:
- Brush twice a day with fluoride toothpaste
- Floss daily to clear plaque between teeth where brushing misses
- Cut back on how often you have sugary and acidic food and drinks
- Drink fluoridated tap water through the day
- Ask about dental sealants for cavity-prone back teeth
- Keep up with routine cleanings and exams so decay is caught early
- Address dry mouth, which lets cavity-causing bacteria thrive
Regular exams do the heavy lifting here. Decay caught at its earliest stage can often be managed before it ever reaches the point of needing a filling.
Nervous About Getting a Filling?
Dental anxiety keeps a lot of people from treating a cavity while it’s still small, and that delay is what turns a simple filling into a bigger repair. If sitting through the appointment is the part that worries you, nitrous oxide — laughing gas — can take the edge off and wears off within minutes of the mask coming off. Ask our team whether it’s a fit for your visit.
Take Care of That Tooth at Tulsa Dental Center
A cavity only gets more expensive to fix the longer it waits. If a tooth is sensitive, aching, or you’ve lost an old filling, our team at Tulsa Dental Center can take a look and get it restored — comfortably and usually in a single visit.
Call (918) 446-6100, email [email protected], or schedule online. We’re located at 4824 S Union Ave, Tulsa, OK 74107.
Frequently Asked Questions About Dental Fillings
How often do dental fillings need to be replaced?
Fillings are replaced when they wear out, crack, leak, or develop new decay around the edge — not on a fixed schedule. Depending on the material, that’s anywhere from about 5 years to well over a decade. Your dentist checks the condition of existing fillings at every routine exam.
Are dental fillings permanent?
No filling is permanent, and none lasts forever. A well-cared-for filling can last many years, but every filling eventually needs replacement as it wears or the tooth around it changes.
Do dental hygienists do fillings?
No. Dental hygienists handle cleanings, exams, and preventive care; placing a filling is a restorative procedure performed by the dentist.
How long does getting a dental filling take?
A single filling usually takes about 20 minutes to an hour, depending on the size of the cavity and the material used. Larger or multiple fillings take longer.
Can you get dental fillings while pregnant?
Yes. Getting a filling is considered safe during pregnancy, and treating active decay is better than leaving it. The second trimester is often the most comfortable time, and you should always tell the office you’re pregnant so care can be tailored to you.
Can you use an HSA or FSA for dental fillings?
Yes. Dental fillings are a qualified medical expense, so you can pay for them with a health savings account or flexible spending account.
How much do dental fillings cost with insurance?
With a typical plan covering 70 to 80 percent of basic restorative care after the deductible, out-of-pocket cost for a standard filling is often modest. The exact amount depends on your plan, the material, and the size of the filling.
How common are dental fillings?
Very common. Approximately 91% of U.S. adults aged 20–64 have had dental caries in their permanent teeth, according to the CDC — which means the vast majority of adults have had at least one filling.
How strong are dental fillings?
Modern filling materials are strong enough to handle normal biting and chewing for years. Gold and amalgam are the most durable, while composite and ceramic are strong and bond well to the tooth — though hard habits like chewing ice can damage any of them.
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