# The shape of the shank of an instrument is described by:
A. Class
B. Subclass
C. Suborder
D. Order
The correct answer is B. Subclass.
Dr. G.V. Black established a nomenclature for hand instruments, similar to the biological classification.
1. Order : Purpose of instrument Eg : excavator or scaler.
2. Suborder : Position or manner of use Eg : Push, pull
3. Class : Form of working end, Eg : hatchet, chisel.
4. Subclass : Shape of shank Eg : Monoangle or binangle.
Naming usually moves from 4 to 1.
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