**3. Material and method**

Bio-Art microblaster (Bio-Art, Brazil) is a pneumatic, portable, ergonomic, and easy to install and use air abrasion handpiece. It is specially designed for simple, small-scale clinical inter‐ ventions, being practical, precise, and ensuring accuracy in use (Figure 1).

**Figure 1.** Bio-Art microblaster, Bio-Art, Brazil [16].

The handpiece is produced in two models:


The equipment package contains: microblaster, quick coupling, handpiece connector, various nozzles, tank for abrasive powder, and user manual.

The aluminum oxide abrasive powder used in the survey was 75 µ grit, which was suitable for removing fissure stains and questionable incipient caries [16].

The occlusal fissures of 20 teeth (molars and premolars) were prepared (14 extracted teeth and 6 clinical cases). The following materials were used:


The following principles [14–18] were considered when using the air abrasion device:

