Which instrument is typically used to gently scrape and clean teeth during a dental cleaning?

The scaler is specifically designed for dental cleanings as it effectively removes plaque, tartar, and debris from the surfaces of the teeth. This instrument is typically hand-held and has a pointed end that allows the dental hygienist or dentist to access and clean areas between teeth and along the gum line, which are critical areas prone to plaque accumulation.

Using a scaler, the dental professional can perform scaling, which is a crucial step in maintaining oral hygiene and preventing periodontal disease. The adjustments in the angle and the various shapes of scalers allow for effective cleaning of both smooth surfaces and interproximal areas.

In contrast, other instruments mentioned serve different purposes. A curette is primarily used for root planing and scaling subgingivally, but it's not solely intended for the cleaning you typically think of in a standard dental hygiene appointment. Mirrors are essential for visibility, allowing the clinician to see areas in the mouth but do not actually clean teeth themselves. Chisels are used in restorative dentistry to shape enamel and dentin but are not designed for the purpose of cleaning. Thus, the scaler is the most appropriate tool for the task of gentle scraping and cleaning of teeth during a dental cleaning.