California Registered Dental Assistant (RDA) Written Practice Exam

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Prepare effectively for the California Registered Dental Assistant (RDA) Written Exam. Utilize our comprehensive quizzes and resources, featuring multiple-choice questions that enhance your understanding and readiness for the exam!

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Which of the following devices have been associated with dental water line biofilm?

Ultrasonic scalers
Dental drills
X-ray machines
LED curing lights

The correct answer is: Ultrasonic scalers

Ultrasonic scalers have been associated with dental water line biofilm due to their use of water during operation. The other options, dental drills, X-ray machines, and LED curing lights, do not require or use water during operation. This significantly reduces the risk of biofilm formation and subsequent contamination. Therefore, ultrasonic scalers are the only device among the choices listed that is commonly associated with biofilm.