Why do different dental clinics find a different number of cavities?
Because they differ in how far they count early cavities as needing treatment. “Another clinic said six, so why do you say two?” is something I often hear in the treatment room. An early cavity that stays only in the enamel (the outer layer of the tooth) can sometimes stop progressing with fluoride and good care, so opinions differ on whether to fill it now or check it again in a few months. Each dentist’s standard for how conservatively to approach it can differ slightly.
On the other hand, there are cases where even an early cavity should not be left to watch: when it is progressing on a surface between the teeth, when your mouth is prone to cavities, or when it is hard for you to come to regular checkups. So the difference in number alone does not tell you which side is right, and what matters is the evidence for each tooth. Treatment at each stage is summarized in Why cavities are treated differently at each stage.
Which cavities can be watched?
| Condition | Possible choice | Reason |
|---|---|---|
| Early cavity that has stopped progressing (enamel) | Watch at regular checkups, fluoride | Once a tooth is drilled, it cannot be undone |
| Cavity progressing between the teeth | Treat with a composite filling or similar | The inside grows faster than the outside |
| Cavity that has reached the dentin | Composite filling or inlay | Hard to stop on its own |
| Cavity close to the nerve | Consider root canal treatment and a crown | Risk of pain and infection |
A tooth that has been drilled and filled once loses a little more structure each time it is treated again later. So for spots that have stopped progressing, keeping them under checkups rather than removing tooth structure is sometimes the right choice. A cavity between the teeth can grow on the inside even when it looks fine from the outside; I have written about this in Can a cavity form between teeth that look fine from the outside?
How do I check the basis for the diagnosis?
Look at the intraoral photos and X-rays together and get an explanation like, “This surface is at this depth, so it needs this treatment.” That is different from an explanation that ends with, “You have this many cavities, so get them treated.” Even for the same condition there can be several approaches, so it is good to hear the options along with the limits of each and how long each is expected to last. If you still do not understand after the explanation, you can ask to see the photos again. Showing the evidence means disclosing the information so that patients can make their own judgment.
What should I ask during a consultation?
- How many of these teeth really need treatment now?
- Are there teeth that can be watched without treatment?
- Are there any items not included in this cost?
- How will follow-up checks work after treatment?
If you are facing major treatment, it is fine to get a diagnosis at two or more clinics and compare. If the plans differ a lot, simply asking each clinic why that difference exists will tell you a great deal.
How we handle it at Wonjin Dental
I start by telling you whether there are teeth that do not need to be touched right now. I do not add no-prep layers onto front teeth that already stick out, I do not place porcelain veneers for a skeletal protruding mouth, and I do not move teeth in a direction the bone cannot support. Treatment prices are published item by item on all treatment fees, so you can check in advance what goes into an estimate. Prosthetics and implants are not finished on the day they are placed, so I also explain the follow-up check plan.
Frequently asked questions
How often is a cavity that we decided to watch checked?
Usually at regular checkups every 6 months to 1 year, we look at changes in size using photos or X-rays. If your mouth is prone to cavities, we set a shorter interval.
Can early cavities be reversed with fluoride?
At the very early stage, when the surface has turned white from demineralization, fluoride and good care can sometimes make it hard again or stop it from progressing. A cavity that has formed a hole does not reverse and needs treatment.
Are there cavities that do not show on X-rays?
Very early cavities or narrow surfaces between teeth sometimes do not show clearly on X-rays, so we look at a visual exam and photos together. If it is unclear, we take another image under the same conditions a few months later and compare the change.
Can I get a cavity check during insurance-covered scaling?
Scaling is covered by Korean National Health Insurance once a year, and many people get a cavity check during the same visit. Scaling by itself does not treat cavities.
