If your dentist has told you that you need a crown when you were expecting a filling — or vice versa — you might be wondering whether it’s really necessary. It’s a fair question. Crowns cost significantly more than fillings, take longer, and remove more tooth structure.
Here’s how we think about the choice at A Smile By Design, and how to evaluate whether your recommendation makes sense.
The simple version
- Filling: for small to moderate damage where most of the tooth is still solid
- Crown: for significant damage where the remaining tooth structure isn’t strong enough to withstand chewing forces on its own
When a filling is enough
- The cavity is small to medium and surrounded by solid tooth
- The tooth has plenty of natural enamel and dentin remaining
- The damage doesn’t extend close to the nerve
- The tooth has no cracks or fractures
- The bite forces on the tooth aren’t too high (front teeth, mostly)
Modern composite (tooth-colored) fillings are excellent. They bond to the tooth, look natural, and last a long time when the tooth has good support around them.
When a crown is the right call
- More than half the tooth is missing or damaged
- The tooth has a crack — even a small one
- You’ve had a root canal (the tooth becomes brittle without nerve blood supply)
- An old filling has failed and there’s not enough tooth left to support a new one
- A back tooth has heavy chewing forces and a large filling that’s likely to fracture
The job of a crown is to wrap the entire tooth and hold it together. Think of it like putting a helmet on a tooth that’s lost too much of its own armor.
The honest gray area
Some teeth fall in the middle. The cavity is bigger than a typical filling but not so big that a crown is obvious. In these cases, we lay out the trade-offs:
- A large filling costs less today but is more likely to crack the tooth in 5-10 years
- A crown costs more today but typically protects the tooth for 15-20+ years
Sometimes the right answer is a filling now and a crown later if it cracks. Sometimes it’s a crown now to avoid the worse problem. We’ll show you the X-ray, walk through both paths, and you decide.
What about an onlay?
An onlay is the middle ground — a custom-made restoration that covers part of the tooth (like a crown) but not all of it (like a filling). They’re great for teeth that need more than a filling but where there’s still enough tooth structure to avoid a full crown. Worth asking about.
Cost considerations
A composite filling is typically $150-$400 depending on size. A crown is typically $1,000-$1,800. Most insurance plans cover at least part of both. We always provide a clear estimate before treatment so you know what’s covered and what isn’t.
If we recommend a crown and you’d rather try a filling first, tell us. There are situations where that’s reasonable — and we’ll be honest about whether yours is one of them.
Get a clear answer
Want a second opinion or a fresh look at a tooth that’s been worrying you? Schedule an exam at A Smile By Design or call (585) 335-2120. We’ll show you exactly what we see and what we’d recommend, with no pressure either way.