Which tool is commonly used for coronal polishing?

The tool commonly used for coronal polishing is a slow-speed handpiece equipped with a rubber cup. This combination is specifically designed to perform coronal polishing effectively. The slow-speed handpiece allows for controlled, gentle movement, which is essential for polishing the surfaces of the teeth without causing damage to the enamel or gingival tissues. The rubber cup, often used with polishing paste, provides a soft yet effective means to smooth surfaces and remove plaque and stains, promoting a healthy and clean tooth appearance.

In contrast, an ultrasonic scaler is primarily utilized for scaling and removing calculus rather than for polishing, and a high-speed handpiece is typically reserved for cutting and shaping tooth structure, not for coronal polishing. Meanwhile, a dental mirror is a diagnostic tool and does not function in the polishing process. Thus, the use of a slow-speed handpiece with a rubber cup is the most effective and appropriate method for coronal polishing procedures.