Can I eat immediately after a fossa closure? You can eat immediately after the closure of a fossa because the sealant has completely solidified under the action of the curing light. It will feel a little strange at first, but you will get used to it after two or three days. Can I be sure that my child will be cavity-free with a sealant? No. Cavity sealing can only reduce the chance of tooth decay. Good oral hygiene is the most important factor in determining the risk of tooth decay. Is the closure permanent? No. Generally, a sealant can be maintained for 3-5 years and can be easily refilled if it wears out or falls off. With regular oral examinations, these problems can be detected in time and the chance of developing cavities on the occlusal surface will be reduced by repairing the teeth that have been socket sealed. To make the sealings last long, children should be encouraged not to bite into ice, too hard or too sticky candies.