There is no set best age to get a fissure sealant. There are different ages for different teeth. Newly erupted teeth often have deep grooves on their surfaces, which makes it easy for food to be trapped there and caries to occur, so it is sometimes necessary to seal the grooves on the teeth by sealing them. The age of socket sealing varies for different teeth. It is generally recommended that it is appropriate to have the sockets closed at 3 to 4 years of age for the milk molars, 6 to 7 years of age for the first permanent molars, and 11 to 13 years of age for the second permanent molars. To prevent the occurrence of dental caries. When children need to do fossa sealing, they should be hospitalized and consult a professional doctor, and then choose the appropriate age and time.