The surfaces of the molar and premolar teeth are vulnerable to decay. This is because the back teeth have grooves or fissures which make food and plaque rest in these areas, and therefore, become susceptible to cavities.
To prevent cases like these, dental sealants can be the right option. These are plastic coatings which are placed on the chewing surface of your back teeth. It provides extra protection for the grooved areas by covering the area.