Pediatric Dentistry Guide for Korea: Infant Oral Checkups, Sealants, Fluoride and Resin Coverage

Pediatric dental care runs from the first baby teeth through the teen years, when permanent teeth settle in. In Korea, the national infant oral checkup is free of charge four times between 18 and 65 months of age, and National Health Insurance covers molar sealants for ages 18 and under and resin fillings in permanent teeth for ages 5 to 12. Preventive treatments such as fluoride application are mostly non-covered, so it helps to confirm which items are insured before your child's treatment begins.

Published 2026-11-08 · Updated 2026-11-08 · DentalStatics editorial team

Key facts

Infant oral checkup timing	4 checkups, at 18-29, 30-41, 42-53 and 54-65 months of age (source: National Health Insurance Service (NHIS, 국민건강보험공단))
Infant oral checkup cost	No out-of-pocket cost (the NHIS pays in full for insured members) (source: National Health Insurance Service (NHIS))
Sealant coverage eligibility	Ages 18 and under, first and second molars without cavities (source: National Health Insurance Service (NHIS))
Sealant out-of-pocket share	10% of the cost (source: Health Insurance Review and Assessment Service (HIRA, 건강보험심사평가원))
Light-cured composite resin coverage	Cavities in permanent teeth at ages 5-12 on the treatment date (expanded to age 13 and under from January 2027) (source: HIRA and Ministry of Health and Welfare)
Preventive topical fluoride	Non-covered by insurance; professional application recommended every 3-6 months (source: NHIS and Korea Disease Control and Prevention Agency (KDCA, 질병관리청))
Outpatient copayment, ages 1 to under 6	70% of the standard patient copayment rate (source: Health Insurance Review and Assessment Service (HIRA))
Baby (primary) teeth	The lower central incisors start erupting around 6 months; all 20 are in by age 2-2.5 (source: Korea Disease Control and Prevention Agency (KDCA))

When should a child's dental care begin?

In Korea, the KDCA advises starting oral care between 6 and 12 months of age, when baby teeth begin to appear. Before teeth erupt, wipe the gums with damp gauze; once teeth come in, switch to an infant toothbrush.

The first national oral checkup is at 18-29 months. Even before that, if you notice white opaque areas or brown spots on the front teeth, it is safer to have a dental clinic that treats children take a look rather than wait for the checkup window.

What is checked at an infant oral checkup?

Korea's infant oral checkup is held four times in total: at 18-29, 30-41, 42-53 and 54-65 months. The 30-41 month checkup was added on June 30, 2022 to help manage cavities as the primary dentition is completed.

The checkup consists of an oral questionnaire and examination for cavities, gum enlargement and tooth abnormalities, plus guidance for caregivers on tooth brushing and eating habits. The NHIS covers the cost for insured members, and the state and local governments cover it for Medical Aid recipients.

The period for each checkup depends on the child's date of birth, so checking the start and end dates in the infant checkup date lookup on the NHIS website helps you avoid missing it. Oral checkups are done at dental clinics registered as infant oral checkup providers.

Do baby-tooth cavities really need treatment?

All 20 baby teeth come in by age 2-2.5 and help with chewing and speech until they are replaced, while also holding space for permanent teeth. Leaving a baby-tooth cavity untreated can lead to pain and infection, and losing a baby tooth too early can narrow the space for the permanent tooth.

In Korea, National Health Insurance coverage of light-cured composite resin applies only to cavities in permanent teeth of children aged 5-12 on the treatment date, not to baby teeth. The Ministry of Health and Welfare announced that from January 2027 the upper age limit for this resin coverage will rise to 13 and under.

Coverage is also widening for quantitative light-induced fluorescence (QLF) cavity detection, which finds children's cavities using light. In December 2024 the Ministry of Health and Welfare decided to recognize this test for children aged 15 and under, up to once every 3 months per mouth.

What preventive treatments exist for children's cavities?

A sealant (pit-and-fissure sealant) fills the narrow grooves on the chewing surface of molars so food and bacteria cannot settle there. For cavity-free first and second molars of children aged 18 and under, it is covered by National Health Insurance, with a 10% out-of-pocket share.

Professional fluoride application is a preventive treatment the KDCA recommends every 3-6 months, but topical fluoride for prevention is not covered by National Health Insurance. If you live in an area with a public health center fluoride program or the pilot Children's Dental Family Doctor program, your costs may be lower, so ask your local public health center first.

Sealants and fluoride do not replace each other. A sealant blocks the grooves on the chewing surface of molars, while fluoride protects the whole tooth surface, so both are sometimes recommended together when a child's cavity risk is high.

How is the out-of-pocket cost of children's dental care set?

When a child aged 1 to under 6 receives outpatient care, the copayment rate for insured items drops to about 70% of the standard patient rate. For children aged 15 and under who are hospitalized, the copayment for insured items is 5% of the total insured medical cost, and it is waived for infants under 2.

These age-based reductions do not apply to non-covered items, so prices for non-covered children's treatments differ from clinic to clinic. When you hear a treatment plan for your child, asking for an estimate that separates insured and non-covered items makes it easier to compare clinics.

Insured examples: molar sealants for ages 18 and under, resin fillings in permanent teeth at ages 5-12
Non-covered examples: preventive topical fluoride, sealants on baby teeth
Items to confirm in advance: treatments that vary by method and material, such as space maintainers and sedation

What if my child is afraid of the dentist?

In pediatric care, tension is eased by showing instruments beforehand and splitting treatment into short steps. When there are many cavities or cooperation is difficult, options such as inhalation sedation, oral sedatives, injectable sedation and general anesthesia are discussed with the dental team.

Fasting times and caregiver preparations differ by sedation method, so if sedation is recommended, decide only after the risks and alternatives of each method have been fully explained. Caregivers can also help by not using injections or pain as a scare in front of the child.

How do I care for my child's teeth at home?

According to the KDCA's infant checkup guidance, brushing twice a day is the basic routine for children, and before age 7 children cannot clean thoroughly alone, so a caregiver should finish the job. The amount of toothpaste and the points to check change with the child's age in months.

However, the more often snacks and drinks are consumed, the longer a child's teeth are exposed to acid. Giving snacks at set times and building a habit of rinsing with water or brushing afterward helps prevent baby-tooth cavities.

18-41 months: rice-grain-sized toothpaste; use floss if teeth are touching
42-53 months: pea-sized children's fluoride toothpaste twice a day
Do not let the child fall asleep with a bottle; give drinks in a cup
54-65 months: permanent teeth begin to erupt, so get a dental checkup

Detailed guides

Frequently asked questions

Must children be seen only by a pediatric dentist?

General dental clinics can also treat children. However, if your child has difficulty cooperating or many cavities to treat, check whether the clinic has a pediatric dentistry specialist or plenty of experience with children and a wide range of sedation and behavior-guidance methods. You can see the pediatric dentistry label in a clinic's listed treatment fields.

What if I miss the infant oral checkup period?

The checkup must be taken within the month range set for each round to be free of charge. For a missed round, follow up at the next round's checkup, and if you are worried about cavities in the meantime, it is better to have the teeth examined first as a regular visit.

Is a sealant on baby molars covered by insurance?

National Health Insurance sealant coverage applies only to cavity-free first and second molars at ages 18 and under, that is, permanent molars. A sealant on a baby molar is treated as preventive care and paid for as a non-covered item.

From what age should a child receive fluoride application?

The Korean Academy of Dental Science guideline introduced by the KDCA recommends fluoride application at least twice a year for children aged 3 and over and for adolescents. The infant checkup guidance also advises periodic fluoride application when needed around 54-65 months.

Is baby-tooth cavity treatment covered by National Health Insurance?

Basic services such as examinations are billed to National Health Insurance, but resin filling coverage applies only to permanent teeth. Whether baby-tooth treatment is covered depends on the material and method, so ask for the out-of-pocket cost of each item before treatment.

Can anyone use the Children's Dental Family Doctor program?

The second pilot program, started in July 2024, runs until February 2027 for elementary school students in 9 areas: Gwangju, Sejong, Seoul, Daejeon, Wonju, Jangseong, Gyeongju, Uiseong and Gimhae. Each semester includes one oral assessment and services such as fluoride application, with a 10% out-of-pocket share of the oral health management fee. Eligible grades widen by year, so check the NHIS website.

References

Korean version →