The Working Stroke Used with an Ultrasonic Tip Is in a Coronal

question 42

Multiple Choice

The working stroke used with an ultrasonic tip is in a coronal to apical direction (starting beneath the gingival margin and moving toward the junctional epithelium) . The working stroke with a hand instrument moves in an apical to coronal direction (starting at the junctional epithelium and moving toward the gingival margin) .

• A)Both statements are TRUE
• B)The first statement is TRUE; the second FALSE
• C)The first statement is FALSE; the second TRUE
• D)Both statements are FALSE

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