Dental sealants provide protection to the pitted and grooved surfaces of the teeth. Using a clear or shaded plastic, a dentist applies the sealants to help keep teeth cavity-free. This is especially effective on the chewing surfaces of back teeth, where most childhood cavities are found. Cleaning the surfaces of back teeth can be difficult or sometimes impossible, which can cause food and bacteria to build up in the crevices. This leaves your child’s teeth in danger of tooth decay. Sealants reduce the risk of decay by sealing out food and plaque. When properly cared for, dental sealants can last for many years. This means your child can remain protected throughout the years they are most cavity prone. Good oral hygiene habits will help sealants last longer.