Why should exposed cementum be avoided during polishing?

Exposed cementum should be avoided during polishing because it can be easily scratched. Cementum is a tissue that covers the roots of teeth and serves to help anchor them in the jawbone. It has a softer texture compared to other dental hard tissues like enamel and dentin. When polishing, the abrasives used in the polishing agents can cause damage to the cementum if it is exposed, leading to surface irregularities that may contribute to further dental issues, such as increased susceptibility to decay and sensitivity. Protecting the cementum during dental procedures is essential to maintain the integrity of the tooth structure and overall oral health.

The other options do not accurately address the primary concern regarding exposed cementum during polishing. Better stain removal and polishing efficiency are not relevant degrees of impact when it comes to managing the health of the tooth surface. Additionally, oral health is deeply impacted by the condition of cementum, making it highly relevant rather than inconsequential.