Fossa sealing generally lasts for 3 to 10 years, depending on the individual. Fossa sealing refers to not damage the tooth tissue, through the fossa sealing coating applied to the teeth fossa point gap, to achieve the role of the treatment, generally after the fossa sealing, keep time is relatively long, can be in the 5 to 10 years; but there are a few patients may be due to improper maintenance, such as often chewing hard objects, resulting in effective time interruption, may be 3 to 5 years. After the fossa sealing, must pay attention to the protection of teeth, usually pay attention to oral hygiene, avoid often chewing hard objects, if partial detachment occurs, should promptly consult the doctor to use resin to fill in the missing.