Different Cavity Diagnoses: Why Clinics Find Different Numbers of Cavities and How to Check
In the analysis of patient comments about Cavities, Overtreatment concerns formed a question cluster of about 1,500 comments. Clinics find different numbers of cavities because dentists judge differently when to treat early or arrested decay. Covers painless cavities, what evidence to ask for and how to compare. SOURCE Analysis of patient comments on YouTube dental content (DentStat) · public sources listed under References · Data as of June 28, 2026
Key facts
| Why the count differs | Dentists may use different criteria for treating early or arrested decay now vs. monitoring it [1] |
|---|---|
| Painless cavities | Decay between teeth or inside a tooth often progresses without pain [1] |
| Covered filling treatment | Amalgam and glass ionomer fillings are covered by National Health Insurance [2] |
| Comments analyzed | 1,500 questions on checking for overtreatment and comparing quotes [3] |
Why do different clinics find a different number of cavities?
The main reason is that dentists may use different criteria for what counts as a “cavity to treat now.” Besides rapidly progressing decay, there is early demineralization before a hole forms and arrested decay that has stopped progressing [1]. There is little disagreement that active decay should be treated, but whether to treat early or arrested decay right away or to monitor it is an area where opinions can differ [1]. Depending on which stages are included in the “number of cavities,” one clinic may report several while another may advise monitoring [1].
DentStat analyzed 1,500 patient comments about checking for overtreatment and comparing quotes on YouTube dental content. Questions about which clinic to trust after receiving very different diagnoses and quotes came up repeatedly, and many comments showed anxiety about dental care in general [3].
Can I be diagnosed with a cavity when there is no pain and no hole?
Yes. Cavities often progress without pain, and decay between teeth (proximal surfaces) or inside a tooth that looks fine on the outside is frequently found on X-rays [1]. Pain can be a late sign that decay has advanced deep into the dentin or is close to the nerve (pulp) [1].
On the other hand, not every dark-looking area needs treatment. Arrested decay that has stopped progressing and left only stain, or simple discoloration, can be monitored instead of drilled right away [1]. In other words, “if it doesn’t hurt, it’s not a cavity” and “if it’s dark, it’s definitely a cavity” are both inaccurate, and the evidence for distinguishing them comes from visual examination, probing and X-rays [1].
What can I check when diagnoses differ a lot?
The starting point for comparison is the “evidence” rather than the “number.” Things you can check include:
- Ask which surface of which tooth is affected, using diagnostic materials such as X-rays and intraoral photos [1]
- Ask whether each tooth has active decay or early or arrested decay that can be monitored [1]
- Check whether the treatment plan lists National Health Insurance covered items (such as amalgam and glass ionomer fillings) separately from non-covered items (not paid by National Health Insurance) [2]
- Ask the dentist who examined you directly about the treatment plan and the diagnostic evidence
In the comment analysis, trust differed sharply between patients who heard the explanation while looking at the diagnostic images themselves and those who did not [3].
How do I compare diagnoses from several clinics?
The approach seen in practice is to compare the diagnosis for each tooth rather than the total quote. Even with the same total, a simple comparison is difficult if the number of teeth included, the treatment level (filling, inlay, crown, root canal treatment) and the mix of covered and non-covered items differ [2]. In the comment analysis, many patients reported getting a second diagnosis from another clinic before treatments that are hard to reverse, such as root canal treatment, crowns or extractions, while others described the time and cost burden of visiting several clinics [3].
For early decay where opinions differ, one option is to monitor it by tracking changes at regular checkups instead of treating right away, and this is not neglect but assumes you keep to the checkup schedule [1].
Common myths and facts
| Common myth | What the evidence shows |
|---|---|
| ”The clinic that finds more cavities is overtreating” | It may be a difference in whether early or arrested decay is counted, so check the evidence first [1] |
| “No pain and no hole means no cavity” | Decay between teeth or inside a tooth often progresses without symptoms [1] |
| “If it looks dark, it must be treated” | Stain and arrested decay can be monitored [1] |
| “A clinic that recommends treatment can’t be trusted” | Active decay requires less tooth removal the earlier it is treated while small [1] |
| “All cavity treatment is non-covered” | Some items are covered, such as amalgam and glass ionomer fillings [2] |
For cavity stages, filling materials and health insurance in general, see the cavity guide. For dental clinics by area, see find a dentist.
Frequently asked questions
- One clinic says I have several cavities and another says none. Who is right?
- It is hard to say either one is wrong. Besides active decay, there are stages such as early demineralization and arrested decay where dentists may differ on treating now vs. monitoring, and results can vary depending on what is counted. One approach is to ask both clinics to explain the diagnostic evidence, such as X-rays.
- Can I be diagnosed with several cavities when I have no pain at all?
- Yes. Decay between teeth (proximal surfaces) or inside a tooth that looks fine on the outside often progresses without pain and is frequently found on X-rays. Pain can be a late sign that appears after decay has advanced close to the nerve.
- How can I tell whether it's overtreatment?
- Checking the evidence rather than the number of cavities is the approach seen in practice. You can ask which surface of which tooth is affected on the X-rays or intraoral photos, whether each tooth has active decay or is at a stage that can be monitored, and whether covered and non-covered items are listed separately.
- Visiting several clinics costs too much time and money. What can I do?
- Many comments in the analysis expressed the same burden. Patients reported getting a second diagnosis from another clinic only for treatments that are hard to reverse, such as root canal treatment, crowns or extractions, or for large treatment plans.
- Is every tooth that looks dark a cavity?
- No. It may be arrested decay that has stopped progressing and left only stain, or simple discoloration, so appearance alone cannot tell them apart. Visual examination, probing and X-rays are used to distinguish them, and arrested decay can be monitored instead of drilled right away.
Find a dental clinic
Compare dental clinics by area and treatment in the area shortlists, or see nationwide figures in dental clinic statistics for South Korea.
Related topics
Root Canal TreatmentProsthetics: CrownsScaling
References
- National Health Information Portal: Dental Caries (Tooth Decay) · Korea Disease Control and Prevention Agency (KDCA)
- National Health Insurance Coverage Criteria for Cavity Fillings (Amalgam, Glass Ionomer, etc.) · Ministry of Health and Welfare · National Health Insurance Service (NHIS)
- Analysis of Patient Comments on YouTube Dental Content: 1,500 Cavity Comments on Overtreatment Concerns (collected 2026-06-28) · DentStat (Osamil Inc.)
This content is general information based on public sources and does not replace diagnosis, prescription or treatment for any individual. If you have symptoms, consult a dentist.