Which condition would contraindicate performing a coronal polish?

The presence of calculus is a significant factor that contraindicates performing a coronal polish because calculus, or tartar, is hard mineralized plaque that cannot be effectively removed through polishing. Polishing is designed to smooth and shine the tooth surface by removing plaque and stains, but it does not address the underlying issue of calculus. If calculus is present, it indicates that the patient requires scaling and periodontal care to properly remove the deposits before any polishing is performed.

In contrast, the absence of stains does not affect the ability to perform a coronal polish, as the primary goal of polishing is not solely to remove stains, but also to provide a smooth surface. Healthy gums are actually indicative of good oral hygiene and do not contraindicate polishing. Recent dental whitening could also be performed alongside polishing, as long as it is within the appropriate time frame, as it may help enhance the effects of the whitening. Therefore, recognizing the presence of calculus is key to determining when coronal polishing should not be done.