In which situation should a dental professional stop the coronal polishing procedure?

Stopping the coronal polishing procedure is warranted when the patient shows signs of discomfort. The comfort and safety of the patient must always be the priority during any dental procedure. If a patient expresses discomfort, whether it's through verbal communication or non-verbal cues such as flinching or tensing up, it indicates that they may be experiencing pain or anxiety. Responding to these signs not only ensures the patient's well-being but also helps maintain a trusting relationship between the patient and the dental professional.

While the duration of the procedure, the cleanliness of the tooth surface, or the assistant's fatigue may influence the course of the practice, none of these factors take precedence over the immediate experience of the patient. It’s crucial for dental professionals to remain attentive and responsive to the patient's needs throughout the procedure. Therefore, stopping when discomfort is observed is the appropriate action.