What can be used to improve the adhesion of sealant to the tooth surface?

The use of phosphoric acid etchant is crucial in improving the adhesion of sealant to the tooth surface. This etching process creates micro-mechanical retention by roughening the enamel, which increases the surface area available for the sealant to bond. When the enamel is etched, it opens up the pores of the tooth surface, allowing for better penetration of the sealant material, leading to a stronger bond and a more effective seal against caries.

While other methods may seem relevant at first glance, they do not contribute to adhesion in the same way. For instance, the application of varnish can actually create a barrier that prevents proper adhesion. Durable composite resins, while useful in restorative dentistry, do not specifically enhance sealant adhesion. Similarly, increased pressure during the application of the sealant may not necessarily improve adhesion, as it does not effectively alter the chemical bonding characteristics or the surface topography of the enamel. Overall, phosphoric acid etching is a well-established technique specifically designed to enhance the sealant's ability to adhere to the tooth structure.