INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the working surface of an instrument called?

Cutting edge, face, or point
Blade or nib
Handle
Shaft

The correct answer is: Cutting edge, face, or point

The working surface of an instrument is referred to as the cutting edge, face, or point because this is the part of the instrument that comes into direct contact with the material being worked on. The cutting edge, face, or point is specifically designed to perform a particular function, such as cutting, shaping, or smoothing. Option B, blade or nib, refers to other parts of the instrument that support or are adjacent to the working surface, but they are not synonymous with the working surface itself. Option C, handle, is the part of the instrument that the operator grips and uses to control the working surface, and option D, shaft, is the long portion of the instrument that connects the handle to the working surface.