Air Abrasion in Dentistry

Air abrasion is a minimally invasive dental technique that uses a stream of fine abrasive particles (typically aluminum oxide) propelled by compressed air to remove tooth decay and prepare teeth for restorations. It offers a drill-free alternative that preserves more healthy tooth structure and often eliminates the need for anesthesia. The technology works by directing a focused stream of 27-50 micron particles at the tooth surface, selectively removing decayed or damaged enamel and dentin. The procedure is quieter, vibration-free, and generates less heat than traditional drilling, making it more comfortable for patients, especially those with dental anxiety. Air abrasion is particularly effective for small cavities, sealant preparation, removing old composite fillings, and surface preparation for bonding. However, it has limitations — it cannot remove silver amalgam fillings, is less effective for large cavities, and creates a dust-like spray that requires rubber dam isolation and protective eyewear. Its conservative approach aligns with modern minimally invasive dentistry principles.