When should he face mask be changed? 

The herpes virus remains latent in the nerves after the initial infection and may reoccur when triggered by which of the following? 

Pre-procedural rinsing and other oral hygiene measures help to prevent the spread of communicable diseases.  Pre-procedural rinsing and other oral hygiene measures decrease the number of microorganisms in the oral cavity.

Which of the following is the least preferred method of pre-cleaning instruments before sterilization?

Of all the nonverbal cues that establish good patient rapport, which one is the MOST important in the North American culture?

Which of the following is NOT a “tarter control” dentifrice ingredient?

Which one of the following is a loosely adherent mass of bacteria and cellular debris and is white or grayish-white in appearance? 

Which of the following professional topical fluorides has the potential to dissolve the filler particles of composite resin restorations (tooth colored)?

Gram-positive cocci enter the bacterial biofilm in how many hours? 

Alcohol based hand rubs have good or excellent antimicrobial activity against which of the following microorganisms?