A filling is the smallest repair in dentistry. Our site spends a lot of time on complicated work, but fillings still deserve their own page, because the whole point of everything else we do is to need less of it.
When decay is found early enough, a filling is the whole treatment. The tooth keeps its walls, keeps its shape, and keeps doing its job. There’s nothing bigger to plan, and you’re done in one appointment.
We use composite
Every filling we place is composite, the tooth-colored material. There’s no long menu, and there doesn’t need to be one.
Composite bonds to the tooth. That matters most, because it means we only have to remove the part that’s actually decayed, instead of cutting the tooth into a shape that holds a filling in mechanically. The repair follows the damage, not the other way around. It’s the same idea behind everything else we do: keep what’s yours, because nothing we can put in your mouth is better than your own enamel.
Small is the whole idea
Most of the fillings we place are small, and that’s on purpose, not luck. Decay caught early, while it’s still shallow, needs a small repair. The same decay found two years later often doesn’t, because by then it has weakened enough of the tooth that a filling isn’t the right answer anymore.
That’s the plain argument for keeping up with exams and X-rays, and it’s the only one that really matters. The difference between a small filling and a crown is often just time.
It’s also why we take photos and X-rays routinely, not just when you ask. A cavity between two teeth is invisible to you, and often invisible to us without an image, until it’s big enough to feel. You can’t make an early decision about something nobody has found yet.
Repairing around an existing crown
This comes up all the time, and almost nobody writes about it.
A crown can’t decay, but the tooth right where the crown meets it can. Over a long enough life, most people end up with an edge somewhere that starts to go. It gets more common with age, as gums recede and the root surface below a crown is exposed, and it’s one of the most common things we find in patients who had good dental work done decades ago.
What to do about it is a judgment call. Here’s how we think about it:
- Ideally, the crown gets replaced. That’s the complete fix. It deals with the whole edge, not just one spot, and starts the clock over.
- But if it’s caught early, a repair can extend the crown’s life. A small composite repair at the edge, done while the decay is still limited, can add years to a crown that’s otherwise perfectly good.
Which way we go depends on how far the decay has spread, how much solid tooth is left around it, how the rest of the crown is holding up, and what makes sense for you. For an older patient with a crown that’s still serving them well, turning a crown replacement into a small repair is a good outcome, not a compromise.
The key word there is early. An edge caught on a routine X-ray can often be repaired. The same edge found because the tooth started hurting usually can’t, and by then we’re talking about replacing the crown, or sometimes whether the tooth can be saved at all. That’s what regular checkups buy you.
When a filling isn’t the right answer anymore
A filling restores a tooth. It doesn’t strengthen it. Once enough of the tooth is gone, adding more filling stops helping, and you end up with a tooth that’s mostly repair, held together at the edges.
Signs we’ve reached that point:
- There’s now more filling than tooth.
- The remaining walls are thin enough to flex or crack when you bite.
- A crack is already running through the tooth.
- It’s a back tooth that has had a root canal.
At that point, we start talking about an onlay or a crown, depending on how much solid tooth is still standing. We explain that reasoning in detail on the crowns page, including why we still place onlays when a tooth suits one.
What to expect, and how long it lasts
A filling usually takes one appointment. We numb the tooth, remove the decay, bond the composite in layers and shape it, and check your bite before you leave. The tooth may be a little sensitive to cold for a few days, especially if the cavity was deep.
What eventually ends a filling is almost always the same thing that caused it: new decay, usually starting at the edge where the filling meets the tooth. Fillings can also chip, and a filling in a mouth that grinds hard has a tougher life than one that doesn’t.
Two things make fillings last longer than anything we do in the chair: your care at home, and coming in often enough that a small problem gets found while it’s still small.
If something feels rough, sharp or sensitive
If a filling feels high when you bite, an edge catches your tongue or your floss, or sensitivity is getting worse over a week or two instead of settling down, give us a call. These are quick fixes, and they’re much easier to sort out early. Call us at 702-734-0776.