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Post operative instructions should be:

At what distance from the CEJ can the mesial furcation on the maxillary second premolars be accessed?

The number of times a powered instrument produces a single stroke length per second is known as the: 

To make air polishing more effective and comfortable, the angle of the tip to the tooth is important.  What are the recommended angles?

One effective way to reduce the number of airborne organisms in the aerosols produced by an electronically powered instrument is: 

The fluid stream flowing through a powered instrument tip produces bactericidal effects.  Slim-diameter insrument tips penetrate deeper into periodontal pockets than do hand instruments.  

Obtaining a bacterial plaque sample for microscopic evaluation requires all of the following  EXCEPT:

Ultrasonic instruments are used with light stroke pressure. The very end (point/tip) of the ultrasonic tip should be directly adapted to the tooth surface.  

The power knob on an ultrasonic device controls which of the following? 

What mechanism does an ultrasonic use to remove calculus deposits fro the tooth surface?