It is important to prevent tooth decay to avoid long-term pain and complications:

- The best way to prevent tooth decay is with a thorough oral care routine.
- The back molars are susceptible to decay due to their uneven surface trapping food, so additional protection can be applied in the form of a thin protective coating of plastic known as sealants.
- Sealants can be applied to healthy teeth or when there are early signs of decay.

"Sealants will often last for several years before they need to be reapplied."
Read the full story here: https://www.mouthhealthy.org/en/az-topics/s/sealants