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Which of the following is NOT required for success instrument sharpening?

All of the following oral conditions contraindicate the use of air polishing with aluminum trihydroxide air-polishing except:

Lubrication of sharpening stones is important for all of the following reasons EXCEPT:

Martha is unable to remove calculus deposits from the maxillary right posterior sextant. The medium-size deposits are located 3 mm beneath the gingival margin and Martha is using her universal curet.  She is beginning to wonder if the cutting edges on the universal curet are dull.  How can she evaluate the sharpness of the instrument? 

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.