What is the most important factor in the success of sealant placement?

The most important factor in the success of sealant placement is that it be placed properly. Proper placement ensures that the sealant adheres effectively to the tooth surface and that it adequately covers the pits and fissures where decay is likely to begin. This involves ensuring that the tooth is thoroughly cleaned and prepared, applying the sealant in the correct thickness, and ensuring that it flows into all the crevices without trapping air. Proper placement maximizes the sealant's protective capabilities against caries, making it critical to the overall effectiveness of this preventative measure.

While having dry teeth during application does play a significant role in the bonding process, proper placement encompasses a broader range of techniques and considerations, including the assessment of the tooth surface and the curing process. A high viscosity sealant may have specific applications but is not universally required for successful sealant placement. Additionally, light-curing is a method used for some types of sealants but does not apply to all, and thus is not the primary factor for success in sealant placement.