HESI General Chairside Assisting Practice Exam 2025 – The All-in-One Guide to Achieve Exam Success!

Question: 1 / 400

What is the recommended angle to hold an ultrasonic scaler during use?

0-10 degrees to the tooth surface

15-30 degrees to the tooth surface

The recommended angle to hold an ultrasonic scaler during use is 15-30 degrees to the tooth surface. This angle is optimal because it allows for effective removal of plaque and calculus without causing damage to the tooth surface or surrounding soft tissue. At this angle, the tips of the ultrasonic scaler can be directed effectively at the deposits while maximizing the cleaning efficiency.

Holding the scaler too flat (0-10 degrees) may not allow sufficient contact with the deposits, resulting in less effective cleaning, while an angle that is too steep (30 degrees or more) could risk injury to the tooth enamel or the gum tissue due to excessive force or incorrect application. Therefore, maintaining the 15-30 degree angle ensures a balance between effective treatment and patient safety.

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30-45 degrees to the tooth surface

45-60 degrees to the tooth surface

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