Before filling a class V abrasion cavity with GIC, what is the first step?

The best first step before filling a class V abrasion cavity with Glass Ionomer Cement (GIC) is to clean the cavity with pumice, using a rubber cup, water, and a weak acid. This cleaning process is essential because it removes debris, plaque, and any contaminating substances from the cavity's surface, ensuring that the bond between the GIC and tooth structure is optimal.

Using pumice helps to provide a smooth surface free of contaminants. Following this, rinsing the cavity with water ensures that all particles and remnants are eliminated. Applying a weak acid can help etch the tooth surface slightly, enhancing the adhesion characteristics of the GIC. This preparatory step is crucial as it lays the groundwork for a good seal and retention of the filling material, ultimately contributing to the longevity and success of the restoration.

Other options, while they mention important steps in the process, would be second to the initial cleaning requirement. Drying the cavity first would not address the need for cleaning, which is vital for effective bonding. Acid etching prior to cleaning might lead to bonding failures if contaminants are still present, and applying a bonding agent is not typically necessary or recommended for GIC, as it is designed to bond to the tooth structure through