Dental sealants are thin layers of protective material that are applied to the chewing surfaces of teeth, usually molars and premolars. Their main task is to prevent cavities by physically securing the grooves and pits where food debris and bacteria easily accumulate. Dental sealants are especially popular among children but are also increasingly used in adults. One of the most frequently asked questions by patients and parents is: How long do dental sealants stay on teeth, and how often do they need to be replaced?
Average durability of sealants
Dental sealants are designed to last for many years, but their actual durability depends on many factors. In ideal conditions, sealants can stay on teeth from 2 to even 10 years.
According to the American Dental Association (ADA), about 80% of sealants remain in place after a year of placement, about 50-60% are still functional after 5 years, and some well-placed sealants can work effectively for a decade.
However, it is crucial that they are checked regularly and refilled, if necessary, because even partial loss of the sealant can reduce its effectiveness in preventing caries.
Factors influencing the durability of sealants
Technique of application
The method of application has the greatest impact on durability. Proper cleaning, drying and preparation of the tooth before applying the material and proper curing of the sealant with UV light significantly increase its adhesion.
Type of material used
There are different types of fissure sealants - from traditional composites to fluoride sealants. Some are more resistant to abrasion and durable, others - intended for shorter use. The choice of material depends on the needs of the patient and the dentist's decision.
Position and function of the tooth
Molars, which take part in intensive chewing, are more susceptible to sealant abrasion than, for example, premolars. Teeth in the lower arch, which are more difficult to dry during the procedure, may have a slightly shorter sealant durability.
Oral hygiene
Patients who keep their teeth clean are less likely to have plaque and tartar that break down the sealant material. Regular brushing and flossing indirectly help maintain sealants.
Eating habits and parafunctions
Frequent chewing of gum, biting of nails, or hard objects can shorten the life of sealants. Similarly, a diet high in sugar and acidic foods can cause the protective coating to wear off.
Why are regular check-ups necessary?
Sealants do not last forever. Even the best material can become damaged over time - it can crumble, chip, or fall off completely. That is why it is so important for the dentist to check their condition during regular check-ups. If necessary, the dentist fills in the material, reapplies the sealant to the entire tooth, and decides whether the tooth requires another form of treatment or prevention. Neglecting check-ups can lead to a situation in which cavities develop under the damaged varnish, making it more difficult to notice and treat.
In conclusion
Dental sealants are an effective and safe form of preventing caries, but their durability is not unlimited. On average, they stay on the teeth from 2 to 5 years, although with proper care and regular check-ups, they can last up to a decade. Their effectiveness depends on the correct installation, the quality of the material, the patient's hygiene, and the care for regular visits to the dentist. To fully benefit from the benefits of sealants, remember that this is not a one-time procedure, but part of long-term oral health prevention. Contact us today to get started with a care plan designed just for you!