What is an onlay in dentistry?
Emily Ross
Published Jan 22, 2026
A dental onlay is larger than a dental inlay but smaller than a dental crown. It fits within the grooves but wraps up and over the cusps and covers more of the tooth's surface. A dental onlay is often used to repair a tooth that has more extensive damage affecting the cusp or potentially the biting surface.
Is an onlay better than a crown?
Compared to a crown, an onlay is a less aggressive restoration when one can be performed, as less tooth structure needs to be removed in order to place the onlay. The costs are similar, but an onlay is a little cheaper than a crown. As such, an onlay is actually the preferred restoration when possible.
How long does an onlay last?
When you care for your teeth and smile, your dental crowns and onlays can last between five and fifteen years. In some cases, dental restorations can last even longer.
Are onlays better than fillings?
An inlay is a restoration that repairs the top portion of a tooth, and an onlay replaces the cusp of a tooth. They offer many advantages over tooth-colored fillings since they are stronger, more durable, and more stain resistant.
Is getting an onlay painful?
Most people experience little to no discomfort following placement of a crown or onlay, but call us right away if you have: Pain or swelling that develops after 24 hours.
43 related questions foundAre onlays safe?
Getting Inlay or Onlays is a very safe and effective treatment. The procedure has very few risks and complications. Some patients might experience: Getting an allergic reaction to the inlay onlay.
What should I eat after onlay?
You may be numb for a period of time after the procedure; avoid chewing, biting, and eating on this side until the numbness wears off. If hungry, try smooth yogurt or other soft foods until the anesthesia wears off. flossing, taking extra care not to loosen the temporary restoration.
Can an onlay fall off?
So, seldom do patients have a permanent onlay fall out. But it can happen, which constitutes a dental emergency. At that time, the person should contact the dentist right away. When the individual has the onlay reset, the dentist will go through the same procedure.
How much should an onlay cost?
How Much do Onlays Cost? You can expect to pay around $900 for the average onlay. If you have dental insurance, you might be able to get it for a bit cheaper, and if you don't have insurance, try to find a dentist that can work with you to get a better price. Out of pocket, dental payments can be expensive.
Are veneers onlays?
A veneer is a tooth-shaped shell that is cemented to the front part of a tooth, while onlays are partial crowns that are used to protect severely-damaged teeth and restore their function.
Is an onlay necessary?
Dental onlays and inlays are necessary to remedy damaged rear teeth that are not in bad enough shape to need a crown. These oral health restorations are primarily used to correct fractured, cracked or decayed teeth when the damage is mild or moderate.
How do you prepare for an onlay?
The procedure to fit and place an onlay usually requires two dental appointments: The first will typically involve your dental professional numbing a portion of your mouth with a local anesthetic. After your tooth is numb, they'll remove the decayed or damaged portion to prepare your tooth for the onlay.
Can you get an onlay after a root canal?
Onlays also protect fractured or broken teeth from further deterioration, and they are considered a great alternative to dental crowns after undergoing a root canal.
Are onlays strong?
Durability: inlays and onlays are stronger than traditional fillings and due to their fit, they are more resistant against damage and last a long time. Easy to clean: the fit of inlays and onlays also makes them much easier to clean than a cap or crown.
What is a gold onlay?
Gold fillings, also called inlays or onlays, are composed of an alloy of gold, copper and other metals. This type of dental filling is usually considered the most durable, lasting 20 years or more, but it is also the most costly.
What is veneer teeth?
Dental veneers (sometimes called porcelain veneers or dental porcelain laminates) are wafer-thin, custom-made shells of tooth-colored materials designed to cover the front surface of teeth to improve your appearance. These shells are bonded to the front of the teeth changing their color, shape, size, or length.
What does Endo mean in dentistry?
“Endo” is the Greek word for “inside” and “odont” is Greek for “tooth.” Endodontic treatment, or root canal treatment, treats the soft pulp tissue inside the tooth. An endodontist is a dentist who specializes in saving teeth.
When do you use an onlay?
When to Use Inlays/Onlays
The dentist near you will recommend inlays/onlays when you have chipped or cracked teeth or are suffering from tooth decay. A crack or chip is not only a cosmetic issue but also affects the function of a tooth when it comes to chewing and biting.
What is the difference between onlay and overlay?
Onlay is bigger and it fills in the damaged tooth in places where the cusps (crowns) of the tooth have to be augmented and makes contact with the opposite teeth when biting, while Overlay covers both inner and outer parts of the crown preserving the tooth substance.
Why do my crowns smell?
Poor hygiene can lead to plaque and buildup that forms around the crown. If this happens, the bacteria present can produce bad breath. Poorly sealed crown margins may lead to leakage in which bacteria can seep under the crown and cause decay. Decay around or under a crown can also lead to bad crown smells.
What are the alternatives to a dental crown?
3 alternatives to traditional dental crowns
- Inlays. Inlays are a tooth restoration option that can often be used instead of a dental crown if the area that needs treatment is located at on the top of the tooth, also known as the cusp. ...
- Onlays. ...
- Porcelain veneers.
Does a root canal last forever?
According to the American Association of Endodontists, root canals have a success rate of over 95% and in most cases they last a lifetime.
Can I chew gum with an onlay?
Gum chewing is inadvisable immediately following certain dental procedures. From crowns and inlays to onlays and bridges, dental procedures come in all varieties and aim to restore broken, weak or missing teeth so they can return to normalcy or become better functioning than before.
Why does my inlay hurt?
Does it hurt? Occasionally you may get sensitivity after having an inlay or onlay placed. In most cases this is usually transient and tends to go away. In teeth that are heavily compromised with restorations that are close to the nerve, the sensitivity may not go away.
Can Pulpitis spread?
Irreversible pulpitis may lead to a type of infection called periapical abscess. This infection develops at the root of the tooth, where it causes a pocket of pus to form. If not treated, this infection can spread to other parts of the body, such as the sinuses, jaw, or brain.