California Registered Dental Assistant (RDA) Written Practice Exam

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The majority of the spray produced by dental hand pieces consists of?

Water
Disinfectant
Saliva
Blood

The correct answer is: Saliva

The majority of spray produced by dental hand pieces is saliva due to it being continually produced during dental procedures. While water is used as a coolant in some dental hand pieces, it is not the main component of the spray. Disinfectant is used to clean surfaces and instruments, but is not typically used in the spray produced by dental hand pieces. Blood may be present in the spray during certain procedures, but it is not the majority component.