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When adapted appropriately, thin ultrasonic tips provide excellent opportunities for access to root concavities and furcations areas.  The fluid lavage produced by ultrasonic instruments will disrupt unattached subgingival bacterial biofilm from the sulcus of pocket space. 

Lydia dos not lubricate her sharpening stone.  What is the major problem with not lubricating a sharpening stone?

From what surfaces can you access the furcations on maxillary molars? 

When evaluated visually, a sharp cutting edge will;

Which of the following power settings is necessary for removing biofilm on a six-month recare patient? 

Oral hygiene instruction should be initiated before the oral prophylaxis is started because the: 

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?