In which situation is coronal polishing likely to be least effective?

Coronal polishing is a procedure designed primarily to remove extrinsic stains and plaque from the surfaces of teeth. In patients with severe gingivitis or advanced periodontal disease, the periodontal tissues are typically inflamed and may bleed easily. Performing coronal polishing in such conditions can be counterproductive because the inflamed tissues may already be compromised, and the use of a polishing tool could cause further irritation or trauma to the gums.

Additionally, coronal polishing is usually meant to be a part of a broader oral hygiene plan and is more effective when done on healthy teeth and gums. In cases of severe gingivitis or periodontal disease, the focus should be on addressing the underlying issues, such as thorough periodontal treatment, before considering aesthetic procedures like coronal polishing. This approach ensures that any scaling or root planing necessary is performed first, allowing for improved tissue health before any polishing is conducted.

In contrast, coronal polishing may be effective in other situations where the patient's periodontal health is stable, such as after a routine dental check-up, in those with mild gingivitis, or in patients undergoing orthodontic treatment, where the focus may be on maintaining aesthetic dental surfaces and plaque control.