To avoid injury, the rubber polishing cup is directed in what manner relative to the gingival third?

The correct approach when using a rubber polishing cup is to direct it away from the gingival third and to apply a light touch. This technique minimizes the risk of damaging the delicate gum tissue during the coronal polishing process. By directing the cup away, the operator ensures that the pressure is not applied directly onto the gums, which can lead to irritation or injury.

Using light pressure is crucial because aggressive or hard applications can cause trauma to the gingival tissues. Proper angling and gentle maneuvering allow for effective polishing of the tooth surfaces without compromising the health of the gingiva. This technique reflects the principles of patient safety and care in dental hygiene practices.