Which factor is NOT a consideration when performing coronal polishing?

Polishing worn enamel is not a consideration during coronal polishing because this practice can exacerbate existing damage to the tooth surface and potentially lead to further wear or sensitivity. Worn enamel is already compromised, meaning it has lost its protective mineral content and is more susceptible to decay and abrasion. Consequently, applying abrasive materials during polishing may not only fail to restore the surface but can also make the situation worse.

In contrast, using high-speed equipment is an approach that demands careful handling and proper technique during polishing to prevent tooth and gum damage. Avoiding grit too deep into the sulcus is essential to maintain periodontal health and avoid aspiration or contamination. Furthermore, avoiding polishing teeth that are permanently discolored is a critical consideration, as such teeth may have intrinsic stains that won’t respond to polishing methods and could lead to further issues if abrasive materials are used unnecessarily.