Enamel Cutting Instruments
Parts of an Instrument
Handle 
Shank 
Working End 
Three-Number Instrument*
Function 
Numbers on handle indicate width, length, and angle of blade
Indicates width of blade in tenths of millimeters
Example: 20 indicates a width of 2 mm
Indicates length of blade in millimeters
Example: 8 indicates a length of 8 mm
Indicates angle of blade from long axis of shaft
Example: 12 indicates an angle of 12 degrees
The designation for the instrument described above is 20-8-12.
Four-Number Instrument*
Function 
Numbers on handle indicate width of blade, angle of cutting edge, length of blade, and angle of blade
Indicates width of blade in tenths of millimeters
Example: 20 indicates a width of 2 mm
Indicates angle of cutting edge of blade in relation to handle
Example: 95 indicates a cutting edge angle of 95 degrees
Indicates length of blade in millimeters
Example: 8 indicates a length of 8 mm
Indicates angle of blade from long axis of shaft
Example: 12 indicates a blade angle of 12 degrees
The designation for the instrument described above is 20-95-8-12.
Enamel Hatchet
Functions 
Characteristics 
Practice Note 
Enamel Hatchet is used on restorative tray setups.
Enamel Hatchet must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indi/>
Stay updated, free dental videos. Join our Telegram channel
VIDEdental - Online dental courses
