Inlays and Onlays

Conservative restorations for moderate decay — stronger than large fillings, less invasive than crowns.

Inlays and onlays are restorations that fall between fillings and crowns in size and purpose. At Austin Longevity , we use inlays and onlays to repair teeth that have damage too large for a traditional filling but not severe enough to require a full crown. Made from porcelain, gold, or composite materials and fabricated outside the mouth, they offer a more durable and conservative restoration option than large fillings while preserving more natural tooth structure than crowns. The difference between inlays and onlays is the area they cover. An inlay fits within the cusps (the raised points) of a back tooth, similar to a filling but made in a lab for a more precise fit. An onlay covers one or more cusps in addition to the area between them, extending up over the chewing surface to protect a more significantly damaged tooth. Onlays are sometimes called partial crowns because they protect a substantial portion of the tooth without covering the entire visible surface like a full crown. Modern inlays and onlays are typically made from porcelain or zirconia, which look natural and bond strongly to the tooth. The procedure usually takes two visits: the first for tooth preparation and impression, the second for placement of the lab-made restoration. Some practices offer same-day inlays and onlays using CEREC or similar in-office milling technology. With proper care, inlays and onlays typically last 15 to 30 years, often outlasting traditional fillings significantly while preserving more natural tooth than crowns require.

When a tooth has damage that's too large for a filling but doesn't truly need a crown, many dentists default to a crown anyway because it's faster and more familiar. At Austin Longevity , we believe in matching the restoration to the actual damage. An inlay or onlay preserves significantly more of your natural tooth structure than a crown while providing comparable strength and longevity for medium-sized restorations. We work with experienced dental labs to fabricate restorations that fit precisely and look natural. For onlays especially, where a portion of the tooth is replaced, we focus on color matching and proper anatomy so the restored tooth looks indistinguishable from the surrounding teeth. We also discuss the trade-offs between inlays, onlays, and crowns honestly so you can make an informed decision about which restoration is right for your specific situation.

How it works

A clear path from consultation to confident result.

Every patient’s journey looks a little different, but the road map is the same: thoughtful planning, careful preparation, precise treatment, and lasting protection.

Evaluate

We examine the tooth, take X-rays, and determine whether an inlay, onlay, or different restoration is the best choice based on the extent of damage.

Prepare

Under local anesthesia, decay or damage is removed and the tooth is shaped to receive the restoration, then impressions or digital scans are taken.

Fabricate

A custom inlay or onlay is made in a dental lab from porcelain, zirconia, or composite material to fit precisely.

Place

The custom restoration is bonded permanently to the tooth, restoring full strength, function, and natural appearance.

Frequently asked

Questions we hear most often.

Still wondering whether this is the right path for you? Schedule a consultation and we’ll talk through your specific goals.

What's the difference between an inlay and an onlay?
An inlay fits within the cusps (raised points) of a back tooth, similar to a filling but made in a lab. An onlay covers one or more cusps and extends over the chewing surface to protect a larger area of damage. Onlays are sometimes called partial crowns because they protect a substantial portion of the tooth without covering the entire visible surface.
How much do inlays and onlays cost?
Inlays and onlays typically cost $650 to $1,500 per tooth, depending on the material used and the size of the restoration. They generally cost more than fillings but less than full crowns. Most insurance plans cover inlays and onlays at 50% to 80% after the deductible. Same-day in-office milled restorations and lab-fabricated restorations are typically priced similarly.
How long do inlays and onlays last?
Inlays and onlays typically last 15 to 30 years with proper care, often outlasting traditional fillings significantly. Longevity depends on the material used, the location and size of the restoration, your bite, and habits like grinding. Porcelain inlays and onlays last well, and gold restorations (less common today) can last 30 years or more.
Are inlays and onlays better than fillings?
For medium-sized restorations, yes. Inlays and onlays are more durable than large composite fillings, fit more precisely (which reduces the risk of decay around the restoration), and don't shrink or expand the way large fillings can. For small to medium restorations, traditional fillings are still the best choice because they're more affordable and equally effective at that size.
Are inlays and onlays better than crowns?
When the damage is the right size for an inlay or onlay, yes, because they preserve more natural tooth structure. Crowns require removing more healthy tooth to place. For severely damaged teeth, root-canal-treated teeth, or teeth with very large restorations, a crown is the better choice because it provides full coverage and protection. The right restoration depends on the specific tooth.
Are inlays and onlays painful to get?
The procedure is comfortable. Local anesthesia numbs the tooth completely during preparation and placement. Some patients experience mild sensitivity for a few days after placement, particularly to hot or cold, which typically resolves on its own. The appointment itself feels similar to getting a filling or crown.
How are inlays and onlays placed?
The traditional process takes two visits. At the first, the tooth is prepared, decay is removed, and an impression or digital scan is taken. A temporary restoration is placed while the permanent restoration is made in a lab. At the second visit, the temporary is removed and the permanent inlay or onlay is bonded into place. Some practices offer same-day options using in-office milling technology.
Will my insurance cover inlays and onlays?
Most dental insurance plans cover inlays and onlays as major restorative procedures, typically at 50% to 80% after the deductible. Coverage may be limited to specific materials (some plans cover porcelain at the same rate as composite fillings, leaving a balance). We verify benefits before treatment so you know your specific coverage and out-of-pocket cost.
Can I get a same-day inlay or onlay?
Yes, practices with CEREC or similar in-office milling technology can fabricate and place inlays and onlays in a single appointment, typically lasting 1 to 2 hours. Same-day restorations offer convenience and eliminate the need for a temporary, but the results are very similar to lab-fabricated options. Both are excellent choices, and the right one depends on your situation and the practice's technology.

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