During the procedure, the dentist will clean the teeth and make sure they do not have any cavities or decay before starting. Next, the doctor will make the surface of the tooth rough and apply the material to the back teeth. Then, a special light is used to harden the material to make sure that it bonds to the tooth. Once the sealants are done, they should last for several years. It’s important to attend regular check-ups to make sure that they are in good condition or to fix anything that needs protecting.