Oklahoma Pit and Fissure Sealants State Practice Exam

What is the primary reason for sealant failures?

1. Material degradation

2. Moisture contamination

3. Improper application technique

4. Types of sealants used

The correct answer is: Moisture contamination

The primary reason for sealant failures is moisture contamination. When moisture is present during the application of pit and fissure sealants, it can compromise the bond between the tooth surface and the sealant itself. Effective bonding is essential for the sealant to adhere properly and provide a barrier against decay. If the enamel or the sealant surface is wet, the sealant may not properly flow into the grooves or pits of the tooth, ultimately leading to a breakdown of the sealant and allowing bacteria to enter, which can result in caries. Moisture contamination can occur not only from saliva but also from any residual moisture on the tooth before the sealant is applied. Therefore, proper isolation of the tooth during the application process is crucial to avoid moisture contact and enhance the longevity and effectiveness of the sealant. While material degradation, improper application technique, and types of sealants used can also contribute to sealant failure, they are secondary factors compared to the critical impact of moisture on the bonding process. Understanding the significance of moisture control during the application is fundamental to ensuring successful sealant placement.