Sixth-aged teeth are the first permanent molars that erupt in children around 6 years old, and they are the pillar teeth of the permanent tooth series, bearing the main occlusal function. If it suffers from decay or loss, it will bring a series of serious consequences to people’s life, such as affecting chewing, tilting and shifting of neighboring teeth, secondary food embedding and decay, etc. Therefore, it is crucial to maintain the health of the sixth-aged teeth. Besides paying attention to the daily oral hygiene and reasonable nutrition, we should visit the pediatric dentist regularly, preferably once every 3 months to half a year, and we should seal the deep sulcus on the tooth surface and fill the sulcus in time when we find the caries.