A 35-year-old man in general good health arrives at the dental office complaining of upper right first
molar tooth sensitivity for the past month. This is triggered when he drinks cold beverages or when he
breathes cold air. This cold sensitivity does not last very long once the stimulus is removed. The tooth
does not hurt when he bites. After a clinical examination and evaluation of a radiograph, the dentist
informs the patient that there is a moderate-to-deep cavity in the tooth. The dentist decides to remove the
cavity in order to better evaluate the patient’s treatment and restorative options. How would the dental
assistant set up the room with respect to restorative materials?