What could happen if the liquid etch is rubbed or burnished during application?

When liquid etch is rubbed or burnished during application, it can lead to damage of the etched enamel rods. The purpose of etching is to create micro-roughness on the enamel surface, which enhances the bonding of restorative materials. However, if excessive pressure is applied or if the etching agent is rubbed too vigorously, it can disrupt the delicate structure of the enamel rods, potentially leading to a weakened bond strength for subsequent dental materials.

This mechanical disruption can compromise the integrity of the enamel, possibly leading to a less effective etching process. It is essential to apply etchants gently to avoid negatively impacting the structure of the enamel and to ensure optimal bonding for restorative procedures.