California Registered Dental Assistant (RDA) Written Practice Exam

Question: 1 / 400

Prior to sterilization, loose contaminated instruments are processed in an ultrasonic cleaner to do what?

Sterilize instruments

Remove large debris

Ultrasonic cleaners are used to remove debris and other contaminants from instruments before they are sterilized. This process helps to ensure that the instruments are thoroughly cleaned before being sterilized, as sterilization does not work effectively if large debris is present. Option A is incorrect because ultrasonic cleaners do not sterilize instruments, they only clean them. Option C is incorrect because ultrasonic cleaners do not dry instruments, they only clean them. Option D is incorrect because ultrasonic cleaners do not disinfect instruments, they only clean them.

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Dry instruments

Disinfect instruments

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