What is one primary function of dental sealants?

• A. To whiten teeth
• B. To prevent cavities by sealing the pits and fissures of teeth
• C. To strengthen the tooth structure
• D. To replace missing teeth

Answer: (B)

The primary function of dental sealants is to prevent cavities by sealing the pits and fissures of teeth. Sealants, which are typically made of a plastic resin, are applied to the chewing surfaces of molars and premolars, where the deep grooves can easily trap food particles and plaque. These areas are often difficult to clean effectively with a toothbrush, making them susceptible to decay. By creating a smooth, protective barrier over these vulnerable surfaces, sealants significantly reduce the risk of cavities developing.

This protective measure is especially beneficial for children and adolescents, as their first molars typically erupt around the ages of six and twelve, during which they are more prone to dental caries. Sealants have been shown to decrease the incidence of cavities in these tooth surfaces effectively, making them a proactive approach in preventive dentistry. Other options mentioned, such as whitening teeth, strengthening tooth structure, or replacing missing teeth, do not align with the specific purpose of sealants which is to prevent decay.