Final answer:
The statement is false; patients at high risk for caries or with thin demineralized enamel are not automatically contraindicated for coronal polishing, as it can remove plaque and stains. However, overall oral hygiene and professional assessment are crucial for these patients.
Step-by-step explanation:
The statement is false. Patients at high risk for caries or with areas of thin demineralized enamel are not contraindications for coronal polishing. In fact, polishing can remove some plaque and extrinsic stains, which might otherwise contribute to the caries process. However, it is important to note that while coronal polishing removes stains and plaque, it is not necessarily a preventive treatment against dental caries on its own. Proper oral hygiene and the use of fluoride treatments are essential for patients at high risk for caries. Furthermore, removing too much enamel can be harmful, but this is usually avoided with professional care. Special care and assessment are always required by dental professionals when performing any procedures on patients with demineralized enamel to prevent further damage.