With the increasing attention to the oral cavity, some oral professional terms are becoming familiar to all parents and children, such as fissure sealing, fluoride application, orthodontics and so on. Today we will first introduce what is the fissure closure. First, what is fissure sealing Fissure sealing is a harmless bonding resin, in the teeth of the joint surface, buccal or lingual surface of the point gap fissure coating, so as to protect the teeth from bacterial metabolism products erosion, to achieve the purpose of preventing the occurrence of caries. It is like putting a protective coat on the teeth. Principle: After the fossa is closed, the original bacteria in the fossa are cut off from the source of nutrition and gradually die; the caries-causing bacteria outside can no longer enter, so as to achieve the purpose of preventing fossa caries. Second, who needs to do fissure sealing? There are many factors involved in deciding whether or not to do fissure sealing, the most important of which is the shape and evaluation of the fissure. 1.Deep fossa, especially those that can catch the probe (including suspected caries). 2, The patient’s other teeth, especially the contralateral teeth of the same name, are carious or have a tendency to become carious. 3.Tooth eruption to reach the occlusal plane, the surface is not covered by soft tissue. 4.Generally within 4 years of tooth eruption. Fissure closure belongs to preventive measures, for the teeth already suffering from caries can not do fissure closure. Third, the best time to close the fossa? The best time for fissure closure is when the teeth are fully erupted and caries has not yet occurred, so children are the most important to do fissure closure. Children’s teeth erupt and reach the occlusal plane, which is suitable for fissure closure. The molar teeth should be closed at the age of 3-4 years, the first permanent molars at the age of 6-7 years and the second permanent molars at the age of 11-13 years. Poor oral hygiene for children with disabilities, although older or teeth eruption oral time is longer, can consider relaxing the age of fossa closure. Fourth, the fossa closed when there is pain? How much is the price? The method of fissure sealing is very simple, by cleaning the teeth, acid etching, rinsing and drying, applying sealant and curing several steps can be completed. If your child is cooperative, all four zones of the mouth can be done at once and it only takes 20-30 minutes. Since there is no grinding of the tooth tissue, there is no pain, and all that is needed is for the child to cooperate is to open his or her mouth. The price is much cheaper compared to the filling and extraction of teeth after caries or even root canal treatment in severe cases, and the price is generally tens of dollars to more than one hundred dollars a piece depending on the material (for example, imported versus domestic). Fifth, how to maintain the fossa after sealing? Will there be caries again? Fissure sealing can effectively reduce the risk of caries, but if the child can not maintain good oral hygiene still have the possibility of caries. Because the fissure sealing is mainly on the occlusal surface of the teeth, there is gradual abrasion in the long-term occlusal process, and the sealing material will be easily dislodged if the child slobbers a lot during the operation. Parents should always observe their children’s teeth and find a doctor to redo the sealing material if it falls off. Parents are also advised to check their children’s teeth regularly in the hospital every year to prevent dental diseases from occurring, as early treatment of dental diseases not only saves money, but also achieves optimal treatment results. Lastly, I would like to remind you that you should go to a professional dental hospital to have your child’s teeth sealed. Let your child’s teeth win at the starting line!