California Registered Dental Assistant (RDA) Written Practice Exam

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What kind of moisture control is recommended for class III and IV procedures?

Rubber dam
Dental dam
Cotton rolls
Saliva ejector

The correct answer is: Dental dam

A dental dam is recommended for class III and IV procedures because it provides complete isolation of the area being treated. A rubber dam may be used in some cases, but it cannot provide the same level of isolation as a dental dam. Cotton rolls may help absorb excess moisture, but they cannot prevent saliva or other fluids from entering the area being treated. A saliva ejector is primarily used to remove saliva and not for moisture control during a procedure. Therefore, a dental dam is the most effective option for moisture control in class III and IV procedures.