Which technique error most commonly leads to sealant failure?

Moisture is indeed a critical factor that can lead to sealant failure. When applying dental sealants, the teeth must be dry prior to application. If there is moisture present from saliva or water, it can interfere with the bonding process of the sealant material to the tooth surface. This interference may prevent the sealant from adhering properly, leading to a weakened seal that may fail, allowing cavities to form beneath the sealant.

Moreover, maintaining a dry field during the procedure is essential to ensure effective penetration and bonding of the sealant in the pits and fissures of the teeth. If moisture contaminates the area, even the best sealant may not perform as intended, ultimately compromising its protective capabilities. Therefore, ensuring a moisture-free environment during sealant application is paramount for the sealant's success in preventing dental caries.