What is a common use for the saliva ejector during dental procedures?

The saliva ejector is primarily utilized in dental procedures to maintain a dry environment within the oral cavity. This small suction device effectively removes saliva and moisture from the patient's mouth, which is crucial for procedures that require a clear view and access to the teeth and gums. Keeping the area dry is essential to ensure that dental materials, such as fillings or crowns, adhere properly and that the clinician can work efficiently without obstruction from excess fluids.

The other options do not align with the primary function of the saliva ejector. For instance, while it may help to remove some debris, it is not designed for significant or large debris removal. Cutting soft tissue is performed with specialized instruments like scalpels or lasers, and polishing teeth involves different tools, such as polishing cups or brushes, rather than a saliva ejector. Thus, the correct answer highlights the saliva ejector's integral role in ensuring effective and accurate dental procedures by maintaining dryness and visibility.