What is the recommended motion when polishing teeth?

The recommended motion when polishing teeth is a light, circular motion. This method is effective because it allows the polishing cup or brush to cover the surface of the tooth evenly without causing damage to the enamel. The circular motion helps to distribute the polishing paste uniformly and facilitates the removal of plaque and stains gently. This technique also reduces the risk of creating grooves or scratches in the enamel, which can occur with more abrasive motions.

The other methods suggested—back-and-forth scraping, constant straight line, and zigzag patterns—are less ideal. A back-and-forth scraping motion can be too harsh on the tooth surface, potentially leading to enamel wear and gum irritation. A constant straight line may not provide adequate coverage of the diverse surfaces of the teeth, especially in areas with contours. The zigzag pattern might also be less effective in achieving a uniform polish while increasing the chances of missing some areas altogether. Therefore, a light, circular motion is the most effective and safest choice for effective coronal polishing.