Current dental office nitrous oxide/oxygen flow meters have a fail-safe system that will stop the flow of N2O whenever the percentage of O2 drops to below ______ percent.

Each of the following is a cause of paresthesia EXCEPT one. Which one is the EXCEPTION?

The tank or cylinder of __________ is always color-coded blue.

This type of clamp retracts the gingival tissues and permits visibility of facial caries:

The plastic, U-shaped frame is placed _______ the dam; the metal Young frame and the Ostby frame are placed ________ the dam.

Once the rubber dam clamp is in place, the operator should check the clamp for stability.

A smaller sized hole is punched for the anchor tooth in the dental dam.

When removing cotton roll isolation, the dental assistant must wet the cotton roll before removal because:

Overdrying of the dentin after etching can cause:

A #557 bur is a(n) ___________ and is used for ______________________.