You have a tooth that needs attention. The cavity is too large for a basic filling, but the tooth isn’t damaged enough to need a full crown. So what do we do? For a lot of patients, this situation feels like being stuck in the middle. A filling won’t hold up. A crown feels like overkill. Is there really nothing in between? There is. They’re called inlays and onlays. And honestly? More patients should know about them.
What Inlays and Onlays Actually Are
An inlay is a custom-made restoration that fits inside the grooves of your tooth, right between the cusps (those raised points on the chewing surface). Think of it like a filling that’s made in a lab instead of placed directly in your mouth.
An onlay is similar, but it covers one or more of those cusps. It’s larger than an inlay but smaller than a full crown. If a filling is a small patch and a crown is a full helmet, an onlay is something in between.
Both are made from durable materials like porcelain or ceramic. They match your natural tooth color. And because they’re fabricated in a lab, they’re stronger and more precise than what we can shape by hand in a single appointment.
When We Recommend Them
Inlays and onlays aren’t right for every situation. But when they are, they’re often the best possible choice.
We typically recommend an inlay or onlay when:
- A cavity is too large for a standard filling to handle safely
- The tooth has minor fractures that don’t require a full crown
- You want a more durable solution than composite filling material
- You want to preserve as much healthy tooth structure as possible
That last point matters more than patients realize. Crowns require removing a significant amount of enamel to make room for the cap. Inlays and onlays are much more conservative. We remove only the damaged or decayed portion, then bond the restoration directly into place.
The Two-Visit Process
Getting an inlay or onlay takes two appointments. First, we numb the area and remove the decay or old filling material. Then we take a digital impression of your tooth. That impression gets sent to a dental lab where skilled technicians fabricate your custom restoration.
Before you leave, we place a temporary filling to protect your tooth. You’ll wear that for about two weeks while the lab works.
You’ll come back once your permanent inlay or onlay is ready. We remove the temporary and check the fit of the new restoration. If everything looks right, and we’re picky about this, we bond it permanently in place.
The result often is a restoration that looks and feels like natural tooth structure.
How They Compare
- Vs. a filling: Fillings are faster and less expensive upfront. But for larger cavities, they’re more likely to fracture or wear out over time. Inlays and onlays last significantly longer, often 10 to 15 years or more.
- Vs. a crown: Crowns cover the entire tooth and are extremely strong. But they require removing more healthy tooth structure. Inlays and onlays are more conservative, preserving enamel that doesn’t grow back.
Are You a Candidate?
If you have a tooth with a large filling that’s failing, or a cavity that feels too big for a simple filling, an inlay or onlay might be exactly what you need. The best way to know is to let us take a look. We’ll examine the tooth, take an x-ray if needed, and walk you through your options. No pressure. Just information.
Our team at AH Smiles serves patients from Arlington Heights, Buffalo Grove, Long Grove, Deerfield, and Northbrook. If you’ve been told a tooth needs a crown and you’re wondering whether there’s a more conservative option, give us a call. We’ll help you figure out what’s right for your smile.