How does the placement of dental sealants help in dental care?

The placement of dental sealants is primarily intended to protect against decay. Sealants are thin, plastic coatings applied to the chewing surfaces of the back teeth, where decay often starts. These areas, especially the pits and fissures on the molars, are prone to trapping food particles and bacteria, which can lead to cavities. By providing a barrier that seals these grooves, sealants help prevent food and bacteria from accumulating, thereby significantly reducing the risk of dental caries.

The other options do not accurately reflect the purpose of dental sealants. While enhancing the appearance of teeth or relieving sensitivity may be desirable outcomes in dental care, these benefits are not associated with the application of sealants. Instead, sealants focus specifically on maintaining the integrity of tooth structure by preventing decay.