Which statement about acid etching of enamel for composite restorations is false?

The statement that the acid-etching agent is flooded onto the surface and rubbed vigorously is false because the technique for applying acid etch is more controlled. When etching enamel, it is important to follow a more careful application process, usually involving a gentle application to create a uniform etching pattern without excessive agitation. Rubbing too vigorously can disrupt the gel's effectiveness, potentially leading to uneven etching and a compromised bond between the enamel and the composite material.

In contrast, acid etching is intended to create a micro-roughened surface on the enamel, which enhances mechanical bonding by increasing the surface area available for adhesion. This is best achieved by allowing the acid to remain on the prepared surface without aggressive scrubbing, which can interfere with the intended results.

The other methods described emphasize correct practices that contribute to effective acid etching. Using applicators designed specifically for the etching material ensures appropriate application and maximizes effectiveness. Additionally, rinsing the etchant from the tooth after the recommended time is critical, as leaving the acid on for too long can damage the tooth structure and diminish the potential for a strong bond with the composite material.