Which of the following is true regarding coronal polishing?

Coronal polishing is a dental procedure specifically designed to remove plaque and stain from the coronal surfaces of the teeth, which are the parts visible above the gum line. When performed correctly, it is generally safe and often beneficial for maintaining oral health. However, option C is correct because if coronal polishing is done excessively or with inappropriate technique, it can lead to enamel wear. The enamel is the hard outer layer of a tooth, and over-polishing can remove this protective layer, making the teeth more susceptible to decay, sensitivity, and other issues.

In contrast, the other options present misconceptions about coronal polishing. The procedure does not specifically target the root surfaces of teeth, nor is it exclusive to children; it can be performed on patients of all ages as part of routine dental care. Additionally, while regular brushing is essential for oral hygiene, it does not eliminate the need for professional dental cleanings, including coronal polishing, especially to remove tartar and stains that cannot be managed at home.