Many parents have a lot of questions about the comparative gutter closure to prevent caries, “When should my child do the gutter closure?” “Where should I go to do the gutter closure?” “If you do the closure, will there be no future problems and no caries?” What is “groove”? Groove refers to the groove and furrow on the uneven surface of the molar in the mouth, which can increase the chewing area, increase the friction, and help to chew the food fully. The groove area is sometimes deeper and more likely to accumulate caries-causing bacteria. Once the bacteria invade the teeth, cavities will occur and gradually damage the whole teeth and shorten the life span of teeth. It is a kind of organic polymer resin material which is harmless to human body and is synthesized by light curing, and is applied in the cross-shaped sulcus of teeth. It forms a protective barrier to prevent bacteria and food residues from entering the sulcus, just like putting on a protective coat and armor for the teeth. Is every child suitable for vulgarization? Vulcanization is mainly for the prevention of dental caries (worm teeth), so it is mainly for the newly erupted permanent molars of children and teenagers. Sixth-aged teeth are the teeth that bear the most important function of chewing, because of early eruption, if not pay attention to protection, it is easy to get caries (insect tooth), so it becomes the main target of the socket closure. Usually, six-year-old teeth are fully erupted at the age of 7-8, which is the best age for closure. Not every child needs to do the treatment. Therefore, before judging whether to do the treatment, we must go to a professional dental hospital for consultation and examination, if the child’s fossa is found to be deep and fissured, it is more suitable for the fissure closure treatment. Will the gutter closure damage the child’s teeth? It only applies the sealing material to the sulcus on the occlusal surface of the crown and the buccal and lingual surfaces to prevent the erosion of cariogenic bacteria and acidic metabolites to the teeth, so as to prevent the sulcus caries. The principle is that the liquid resin cures and hardens after entering the sulcus, forming a protective barrier that covers the sulcus and prevents cariogenic bacteria from entering outside, thus preventing sulcus caries. Closure is fast and painless. Will I never get cavities if I have a fissure closure? It is only effective to prevent the caries. The so-called sulcus closure is a health care measure to prevent the occurrence of sulcus caries by sealing the newborn permanent teeth or milk teeth with deep sulcus without damaging the tooth. However, this preventive effect is not 100% effective and the sealant is not permanent. If the sealant wears out or falls off, sulcus caries may still occur. Secondly, the occurrence site of caries is not only limited to the sulcus, for children, the incidence of adjacent surface caries is also not low, and the sulcus closure has no preventive significance for smooth surface caries, adjacent surface caries and root surface caries. It is very important to develop good brushing habit to keep oral hygiene, and parents are suggested to observe children’s teeth regularly and see the dentist in time if problems are found, so that prevention is better than cure. The gum closure is only a small part of a child’s lifetime cavity-free plan. Brushing, flossing, proper diet, controlling snacks and regular visits to the dentist are very important for children to have healthy teeth. About how long does it take? Medically, there are four zones in the mouth: upper, lower, left and right. If the child cooperates, all four zones can be done at once, and it does not take long, only 20-30 minutes, because there is no grinding of the dental tissues, so there is no pain, what needs the child’s cooperation is to open the mouth. Do I need to review after closure? It is usually not recommended for children to chew with the same side of the teeth on the same day after the closure. Although the effect of chewing is not particularly significant, there is still a concern that chewing may affect the effectiveness of the sealant. If both sockets are closed, it is recommended to take soft or liquid food on the same day. It is not always possible to keep the sealant with the teeth and regular check-ups are still needed after the closure. The dentist suggests that regular review should be done in 3 months, 6 months, 1 year and every year after the sealing, in order to find out whether the sealant is lost, whether the edge is missing, whether there is suspected caries, etc. If it is lost, the sealing should be redone, then the retention rate of sealant and the reduction rate of caries will be improved.