What is one of the most common reasons for sealant failure?

Incomplete sealing of the tooth surface is one of the most common reasons for sealant failure. Sealants work by creating a barrier that prevents food particles and bacteria from entering the pits and fissures of the teeth, which are difficult to clean. If the tooth surface is not properly cleaned or the sealant is not adequately applied to fully cover the surface, voids or gaps may be left behind. These gaps can allow bacteria and plaque accumulation, leading to caries, which ultimately compromises the effectiveness of the sealant. This underscores the importance of meticulous application techniques and thorough cleaning of the tooth prior to sealant placement to ensure optimal adhesion and coverage.

In contrast, while factors like excessive fluoride exposure, expiration dating, and training deficiencies can influence overall treatment quality, they are not as directly related to the sealing process itself. The core issue lies in ensuring a complete and effective seal to reduce the risk of tooth decay in areas where sealants are applied.