Adults need to do fissure sealing if necessary according to the condition of teeth. 1. Fissure sealing, mainly for newly erupted teeth, deeper fissures, poor self-cleaning teeth, the use of polymer resin material, relying on its mobility into the fissure fissures, to prevent the invasion of food debris and bacteria, thereby reducing the chances of dental caries. The main indications are newly erupted permanent teeth. 2. adult teeth, eruption time is longer, due to the wear and tear of daily meals, the fossa becomes shallow, relatively good self-cleaning effect, relative adult self-discipline is better than the children, oral hygiene is relatively good, there is generally no need to do fossa closure, such as the adult teeth, deeper fissure fissure, self-cleaning effect is poor, which can easily lead to dental caries, but also necessary for fossa closure to prevent dental caries. It is recommended to brush your teeth every day after meals, pay attention to oral hygiene, regular scaling, to prevent periodontal disease, caries, maintain oral health.