Page 29 - My FlipBook

'

INSTRUMENTS AND INSTRUMENTATION. 25

Class names,
Sub-class names.
Order names denote purpose, and answer the question
'
'
' what for.
Examples : Excav^ators,
Pluggers,
Separators,
Scalers,
Clamps, etc.
Sub-order names denote the manner or position of use,
'
and answer the question ' where or how used ? ' and are usually
'
a suffix to an order name.
Examples : Hand mallet.
Hand plugger,
Mallet plugger,
Enamel hatchet,
Push scaler.
Pull scaler,
Molar clamp, etc.
Class names are descriptive of the working point of the
instrument.
Examples : Hatchet,
Hoe,
Spoon,
Discoid,
Cleoid,
Serrated plugger.
Smooth plugger, etc.
These are also used as suffixes to order names, as in the last
two ; and also as in hatchet excavator, hoe excavator, etc.
Sub-class names describe the shape of the shank of the
instrument.
Examples : Mon-angle,
Bin-angle, '
Triple-angle,
Contra-angle,
Cow-horn,
Bayonet, etc.
These names are often combined for more complete descrip-
tions of the instruments named, thus : Mon-angle excavator, or,