Coronal Polish Certification Practice Test

How should the rubber cup be held for effective polishing?

1. Upright against the tooth

2. Flat against the tooth

3. At an angle to the tooth

4. Loosely around the tooth

The correct answer is: Flat against the tooth

For effective polishing, holding the rubber cup flat against the tooth is the optimal technique. This positioning allows for even distribution of the polishing paste and maximizes surface contact, enabling a thorough cleaning and polishing action. When the rubber cup is held flat, it ensures that the entire surface area of the tooth is engaged, effectively removing plaque and stains without uneven pressure that could lead to discomfort or ineffective polishing. Other positions, such as upright against the tooth or at an angle, may limit contact with the tooth surface, resulting in uneven polishing or incomplete coverage. Additionally, holding the cup loosely around the tooth would not provide enough control or pressure needed for effective removal of debris and stains. Therefore, the flat position is preferred for achieving optimal polishing results.