Which dental instrument is necessary for isolating a tooth during a procedure?

The correct instrument for isolating a tooth during a dental procedure is the rubber dam clamp. This device is used in conjunction with a rubber dam, which serves to create a dry and clean operative field by isolating the tooth being worked on from the rest of the mouth. The rubber dam is essential for many procedures as it helps to prevent saliva and other fluids from interfering with the dental work, ensuring better visibility and control over the area.

A rubber dam clamp plays a crucial role in securing the rubber dam material around the tooth, allowing the dentist or dental assistant to isolate the area effectively. By maintaining a clean and dry environment, the rubber dam enhances the quality of the procedure, reduces the risk of contamination, and improves patient outcomes.

In contrast, while a cotton roll holder is useful for keeping cotton rolls in place to aid in isolation, it does not provide the same level of isolation as the rubber dam. A sharps container is necessary for the safe disposal of sharp instruments but does not assist with tooth isolation. A scalpel, primarily used for cutting soft tissue, is not relevant to the isolation of teeth during procedures.