AA full set of backup instruments is unavailable and an item is needed urgently
BRoutinely sterilizing implants
CSterilizing items for the next day's cases
DReplacing terminal sterilization of all trays
✓ Correct answer: A. A full set of backup instruments is unavailable and an item is needed urgentlyIUSS is reserved for situations where an item is needed immediately and no sterile replacement is available, such as a dropped instrument with no backup. It should not be used for routine processing or, ideally, for implants.
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