Your oral & dental health A-Z oral health information Pit and fissure sealants What are sealants? Sealants are a safe and painless way of protecting your teeth from tooth decay. A sealant is a protective plastic coating, which is applied to the biting surfaces of the back teeth. The sealant forms a hard shield that keeps food and bacteria from getting into the tiny grooves in the teeth and causing decay. Which teeth should be sealed? Sealants are only applied to the back teeth - the molars and premolars. These are the teeth that have ‘pits' (small hollows) and ‘fissures' (grooves) on their biting surfaces. Your dental team will tell you which teeth should be sealed after they have examined them, and checked whether the fissures are deep enough for sealing to help. Some teeth naturally have deep grooves which will need to be sealed; others have shallow ones which will not need sealing. What is involved? The process is usually quick and straightforward, taking only a few minutes for each tooth. The tooth is thoroughly cleaned, prepared with a special solution, and dried. The liquid sealant is then applied and allowed to set hard - usually by shining a bright light onto it. Will I feel it? No, it is totally pain free, and the teeth do not feel any different afterwards. How long do pit and fissure sealants last? Sealants usually last for many years, but your dental team will want to check them regularly to make sure that the seal is still intact. They can wear over time, and sometimes the dental team need to add or replace some sealant to be sure that no decay can start underneath it. How do pit and fissure sealants work? The sealant forms a smooth, protective barrier by covering all the little grooves and dips in the surface of the tooth. Dental decay easily starts in these grooves if they are not sealed. When should this be done? Sealants are often applied as soon as the first permanent teeth start to come through. This is usually between 6 and 7 years of age. The rest are usually sealed as soon as they appear which can be any time between 11 and 14 years of age. Do I still have to clean my teeth? Yes. It is still very important to do this. The smooth, sealed surface is now much easier to keep clean and healthy with normal brushing. Using a fluoride toothpaste, last thing at night and at least one other time during the day, will help to protect your teeth. Pit and fissure sealing reduces tooth decay and the number of fillings you might need. Who do I ask about the treatment? If you would like to know more about the treatment, ask your dental team. They will tell you if fissure sealing will help your teeth, and if it is the right time to do it. People who viewed this page also visited... Caring for my teeth Tooth decay My teeth Need more advice? If you need free and impartial advice about your oral health, contact our Dental Helpline by email or call 01788 539780 (local rate call in the UK). Our Dental Helpline is completely confidential and has helped almost 400,000 people since opening over 20 years ago. Contact our experts by telephone, email or online enquiry, Monday to Friday, 09:00 - 17:00.