Crown vs Filling: Which Does Your Tooth Need?
Quick answer: crown vs filling
A filling repairs a small to mid-size area of damage and leaves most of your tooth in place. A crown is a custom cap that covers the whole visible tooth. Dentists use a crown when too little tooth is left to hold a filling, when a tooth is cracked, or after a root canal. Your dentist decides after an exam.
Fillings fit smaller repairs. Crowns fit teeth that need full coverage.
The main question is how much healthy tooth remains.
A filling is usually one visit. A crown usually takes two, unless the office makes it in one visit.
Your dentist said the word "crown" and you were expecting a filling. Now you want to know what the difference is, and whether you really need the bigger fix. At Smyrna Dental Studio in Smyrna, GA, our team can walk you through it, so here is the plain version: what each one does, how a dentist decides, and what to ask at your visit.
What is the difference between a crown and a filling?
A filling replaces the part of the tooth that was lost to decay or a small break, and the rest of your natural tooth stays as it is. A crown is a cap that fits over the entire tooth above the gum. A filling repairs a spot. A crown protects the whole tooth.
What a filling does
Your dentist removes the damaged part and fills the space. The ADA's MouthHealthy site says tooth-colored composite fillings have good durability and resistance to fracture in small to mid-size fillings. We place tooth-colored fillings for repairs like these.
What a crown does
MouthHealthy says a crown can restore a tooth to its normal shape and size, strengthen it, and improve its look. Cleveland Clinic lists more uses: covering a weak tooth, protecting a cracked tooth, covering a tooth after a root canal, and topping an implant.
How does a dentist decide between a crown and a filling?
The deciding factor is how much healthy tooth remains once the damage is removed. If enough strong tooth is left to hold a filling under your chewing force, a filling is usually enough. If not, the tooth may need a crown to hold together.
When a large filling is not enough
MouthHealthy says a crown can strengthen a tooth with a large filling when there is not enough tooth left to hold the filling.
When a tooth is cracked
Cleveland Clinic says cracked tooth treatment depends on how much damage there is. Options range from tooth-colored resin for a crack, to a porcelain or ceramic cap over the tooth. It also notes that fine surface lines called craze lines do not hurt, and that a crack can form around an existing filling. Any crack deserves a dentist's look. Our post on signs you may need a dental crown lists what to watch for.
After a root canal
Cleveland Clinic lists "cover a root canal-treated tooth" as a reason for a crown. If you are in that spot, read about whether you need a crown after a root canal.
A quick side-by-side
Question | Filling | Crown |
|---|---|---|
How much tooth does it cover? | The damaged spot | The whole visible tooth |
Usually suited to | Small to mid-size damage | Weak, cracked or root canal-treated teeth |
Usual visits | One | Two, or one with an in-office crown |
Want this checked? Our team can look at the tooth and talk through your options. You can request a visit online or call (770) 863-0005.
Is there something between a filling and a crown?
Yes. Cleveland Clinic describes inlays and onlays as a middle step. They can restore a tooth that is too damaged for a filling but too healthy to warrant a crown. An inlay or onlay covers only the affected part, while a crown covers the whole tooth.
Ask your dentist whether an inlay or onlay is an option for your tooth.
How many visits does a crown take compared with a filling?
A filling is usually done in one visit. Cleveland Clinic says a crown usually takes two visits, because a dental lab often needs two to three weeks to make it. Some offices can design and mill a crown in one visit.
What happens at a two-visit crown
At the first visit the dentist removes some enamel, may build up the tooth with filling material, and takes impressions. You wear a temporary crown. At the second visit the dentist checks the fit and bonds the new crown.
What about same-day crowns?
Cleveland Clinic says in-office design and milling can let you get a crown in one visit, but it is not right for everyone. If this interests you, ask whether you are a candidate for same-day crowns. For more on timing, see our guide to how long a crown procedure takes.
How long do fillings and crowns last?
Cleveland Clinic gives an average crown lifespan of five to 15 years. MouthHealthy says no filling lasts forever, and that some studies show composite fillings may need to be replaced more often than amalgam (silver-colored) ones. How long yours lasts depends on the tooth, your bite and your care.
What helps either one last
Cleveland Clinic says to avoid ice, hard nuts, popcorn kernels and very sticky candy with a crown, and to ask about a mouth guard if you grind. Brushing, flossing and checkups protect both. Read more about how long fillings last.
What are the downsides of a crown?
Cleveland Clinic lists the trade-offs. A crown means removing some natural enamel. It may cause sensitivity in the first few weeks. It can break over time, and a poor fit can trap bacteria and lead to decay.
Which one should you choose if your tooth hurts?
You do not choose by pain. Pain tells you a tooth needs a look, not which repair it needs. A dentist checks the tooth, takes X-rays, and then explains your options. The aim is the most conservative repair that will hold up.
Signs to book a visit soon
Sharp pain when you bite down
Sensitivity to hot, cold or sweet
A visible crack, chip or a filling that has come out
A filling or crown that feels loose or rough
Which sign means call right away?
Call the office if you have pain that will not go away, swollen gums, or a fever. Go to the ER or call 911 for swelling with trouble breathing or swallowing, a high fever, or swelling that spreads to your eye, face or neck.
Frequently asked questions
Is a crown better than a filling?
Neither is better for every tooth. A filling keeps more of your natural tooth, so it is often the first choice for smaller damage. A crown gives full coverage when a tooth is weak, cracked or has little structure left. The right fit depends on your tooth, which a dentist has to examine.
Can a tooth with a filling need a crown later?
Yes. MouthHealthy says a crown can help a tooth with a large filling when there is not enough tooth left to hold it. Cleveland Clinic also notes a crack can form around a filling. Your dentist may suggest a crown if the tooth weakens over time.
Does a crown mean no filling is needed?
Not always. Cleveland Clinic says the dentist may build up the tooth with filling material before the crown goes on. That material helps rebuild the shape of the tooth so the crown has a solid base. The crown then covers it. Your dentist can explain what your tooth needs.
Does a crown hurt more than a filling?
The sources we read do not compare the two for pain. Cleveland Clinic says sensitivity to heat and cold is normal for a couple of weeks after a crown, and gum soreness should fade within a few days. Ask your dentist how comfort is managed at your visit.
What happens if you wait?
Waiting can let a problem grow. Cleveland Clinic says that without treatment, a cracked tooth may lead to an infection. A small repair can turn into a larger one if a problem is left. If a crack worries you, read how long you can wait to fix a cracked tooth.
Book an exam to find out which repair fits your tooth
You do not have to guess between a crown and a filling. Our team, including Dr. Raheel Thobhani, who provides general, restorative and cosmetic dentistry, can examine the tooth and explain your options. You can book an exam online or call (770) 863-0005, and we will help find the earliest visit available. We welcome patients from Smyrna and nearby areas. To compare crown types, see what type of dental crown suits which tooth. This is general information, not a diagnosis. A dentist needs to examine you to advise on your situation.