INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the working end of an instrument called?

Blade or nib
Handle
Shaft
Tip

The correct answer is: Blade or nib

While all the options are necessary parts of an instrument, only the blade or nib serves as the working end. The handle is the part that is held by the user and provides support and control, but does not have a direct role in the instrument's function. The shaft is the part that connects the blade or nib to the handle, but does not contribute to the instrument's use. The tip is a general term that could be applied to any part of the instrument, so it is not specific to the working end. Thus, the blade or nib is the most accurate and specific answer as the working end of an instrument.