What is the best isolation technique when applying sealants?

The rubber dam is considered the best isolation technique when applying sealants because it provides a dry and clean operating field, which is critical for the effective application of dental sealants. The use of a rubber dam prevents moisture from saliva and blood from contaminating the tooth surface, ensuring that the sealant adheres properly and provides optimal protection against decay.

A rubber dam also allows for greater visibility and access to the tooth being treated, facilitating the precise application of the sealant material. This isolation technique minimizes the risk of any inadvertent ingestion of materials by the patient, and it helps keep the tooth free from contamination during the procedure.

While cotton rolls and saliva ejectors can help manage moisture to some extent, they do not offer the same level of isolation as the rubber dam. Isolating sponges can be useful in certain procedures, but they also do not provide the same comprehensive protection from saliva and debris.