Children get their first set of molars around the age of 6 and the second set of molars around the age of 12.
The deep grooves (pits and fissures) of newly erupted teeth along with the inability of children to clean these areas properly make them a target for decay. Diet also plays a big role in the development of decay. Many foods are very “gummy” and will be retained in the deep grooves making them more susceptible to decay.
After placement, the dental sealants will fill in those deep pits and fissures so foods cannot “stick” in the grooves and can then be easily washed away.