ADC Practice Question — Visits to Residential Aged Care

rotary NiTi ProTaper files are not marked as…

Infection control in the ADC exam tests decision-making around exposure incidents, instrument classification, and decontamination protocols. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.

Dr Raj Mehta has just completed a root canal treatment on Patient A using hand K-files and rotary NiTi ProTaper files. He then has Patient B scheduled for a crown preparation requiring high-speed and low-speed handpieces. His dental assistant needs to reprocess the instruments from Patient A and prepare the handpieces for Patient B. The rotary NiTi ProTaper files are not marked as single-use by the manufacturer. How many times can they be reused, and what is the first step of the validated reuse protocol?

A. Up to 5 times; first step is ultrasonic cleaning in enzymatic solution
B. Up to 3 times; first step is removing stoppers and cleaning with 10 vigorous strokes in a CHX-soaked sponge
C. Up to 10 times; first step is soaking in glutaraldehyde solution
D. Unlimited reuse; first step is autoclaving without cleaning

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Sources cited

Therapeutic Guidelines v4 Odell's 3rd & 4th Ed IADT 2020 Code of Conduct CMS (Evans) Infection Control + more

Show the answer and cited explanation

Correct answer: B

Rotary NiTi files may be reused up to three times using a validated protocol. Step 1: remove stoppers and clean with 10 vigorous strokes in a CHX-soaked sponge. Step 2: soak 30 min in enzymatic solution (Empower). Step 3: 15 min ultrasonic cleaning in same solution. Step 4: rinse 20 seconds under running water. Step 5: package and steam sterilise. Files marked single-use cannot be processed. (ICG p.73)

Source: ICG Section F: Endodontic Files

Remy's study tip — The differentiator is usually the Spaulding classification level or the step order in a protocol.

Exam preparation FAQ

How do I approach an unfamiliar Visits to Residential Aged Care vignette?

Extract key clinical data from the stem before reading options. There are usually 3–4 critical variables that determine the correct answer.

How should I prepare for Infection Control in the ADC exam?

Build competence across all topics. The exam tests application of guidelines to clinical scenarios, not memorisation.

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rotary NiTi ProTaper files are not marked as…

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