What is the main reason sealants fail in dental procedures?

The main reason sealants fail in dental procedures is contamination. Contamination refers to the presence of moisture, saliva, or blood on the tooth surface when the sealant is being applied. This can significantly hinder the bond between the sealant material and the tooth, preventing effective adhesion. For sealants to work effectively, the surface must be clean and dry during application; even a small amount of contamination can lead to the breakdown of the bond, ultimately resulting in sealant failure.

While factors like insufficient bonding agents, poor application technique, and inadequate sealing materials can contribute to sealant issues, the presence of contaminants during application is often the most critical factor leading to their failure. Proper isolation and meticulous surface preparation are essential for ensuring the success of sealants in dental treatments.