The air-polishing technique uses a specifically designed handpiece with a nozzle that delivers a high-pressure stream of warm water with what additive?

The air-polishing technique is utilized in dental practices to remove stains and debris from the tooth surface and is particularly effective for cleaning teeth prior to procedures like sealant application or before orthodontic treatment. The high-pressure stream delivered by the specially designed handpiece is combined with sodium bicarbonate, commonly known as baking soda.

Sodium bicarbonate is a mild abrasive that effectively removes plaque and surface stains without damaging the enamel. It also has a neutral pH, which makes it gentle on the oral tissues. This additive is well-suited for the air-polishing system as it dissolves easily in the water stream, allowing for an efficient and effective cleaning process.

Other options such as sodium chloride and potassium nitrate are not used in this technique. Sodium chloride is more commonly found in saline solutions and does not possess the necessary abrasive properties for effective stain removal, while potassium nitrate is typically used for desensitizing agents rather than cleaning or polishing. Calcium carbonate, while used in some abrasive agents, is not the standard additive for the air-polishing technique, as it is less soluble in water compared to sodium bicarbonate. Hence, sodium bicarbonate is the ideal choice for this application.