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Patients who form heavy calculus deposits have higher salivary levels of calcium and phosphorus than do patients who form light calculus deposits.  Patients who form light calculus deposits have higher levels of pyrophosphate.

All of the following are posteruptive benefits of fluoride exposure except one.  Which one is the exception?

The ADA Seal of Acceptance Program is designed to study and evaluate products for safety and efficacy.

Which one of the following would be considered the least important feature for a toothbrush handle to have?

The following are therapeutic active ingredients in dentifrices except:

Dental biofilm located between the periodontal attachment and the gingival margin (within the sulcus) is called supragingival biofilm.  Dental biofilm occurs least frequently on the anterior surfaces.  

All of the following dental products are regulated by the FDA except:

Discoloration of the teeth of a child can result when tetracycline is administered to the mother during which month of pregnancy?

You are communicating with a patient who is blind.  The patient’s blindness is an example of which type of barrier to communication?

Subgingival biofilm is made up of four layers, which are predominately gram-negative anaerobic and motile organisms. Subgingival bacteria most associated with clinical signs of gingivitis and inflammation are Prevotella and Selenomonas.