What is the purpose of a dental sealant?

The purpose of a dental sealant is to seal the grooves and pits of the teeth, primarily the molars, to prevent cavities. This process involves applying a thin, protective coating to the tooth's surface, which acts as a barrier against food particles and bacteria. The grooves and pits in molars can be difficult to clean effectively with a toothbrush, making them susceptible to decay. By applying a sealant, dental professionals help protect these vulnerable areas, contributing to overall oral health and reducing the risk of cavities.

Other options, such as holding or mounting x-ray films and cleaning under bridges, relate to different dental procedures or uses. They do not address the specific preventive role that sealants play in cavity prevention, which is the key function of dental sealants.