What is the most common cause of sealant loss?

Moisture contamination during the placement of dental sealants is a critical factor that can lead to sealant loss. When moisture, such as saliva or blood, is present on the tooth surface during the application of the sealant, it can interfere with the bond between the sealant material and the enamel. This bond is essential for the sealant to effectively protect the tooth from decay. If the sealant does not adhere properly due to moisture, it may become dislodged over time, leading to its premature loss.

The other factors, while they can potentially influence the effectiveness of sealants, do not play as significant a role as moisture contamination. For instance, improper application technique and insufficient curing time can cause issues, but they are often less prevalent compared to the impact of moisture during the critical bonding phase. Similarly, poor tooth surface preparation is important but does not directly relate to contamination, which is often the immediate challenge during the application process. Understanding moisture's impact helps dental professionals take necessary precautions to ensure that sealants last as long as intended.