Air polishing on occlusal surfaces uses what angulation?

• A. 90°
• B. 60°
• C. 80°
• D. 45°

Answer: (A)

Direct the nozzle perpendicular to the occlusal surface. This 90-degree orientation lets the abrasive particles strike the enamel squarely, effectively reaching pits and fissures while minimizing contact with soft tissues and reducing the chance of enamel abrasion. Angles that are more oblique tend to skim along the grooves or direct spray toward the gingiva, making cleaning less efficient and increasing tissue irritation risk.