INSTRUMENT QUIZ Flashcards
THREE NUMBER FORMULA: when do we use it
when primary cutting edge is at 90 degrees
THREE NUMBER FORMULA: what is first number
WIDTH of blade -mm
THREE NUMBER FORMULA: what is second number
LENGTH of blade - mm
THREE NUMBER FORMULA: what is third number
ANGLE of blade from long axis of shaft - centigrade
FOUR NUMBER FORMULA: when do we use it
when primary cutting edge is NOT at a right angle w/ long axis of blade
FOUR NUMBER FORMULA: what is first number
WIDTH of blade
FOUR NUMBER FORMULA: what is second number
ANGLE of CUTTING EDGE from long axis of shaft
FOUR NUMBER FORMULA: what is third number
LENGTH of blade
FOUR NUMBER FORMULA: what is fourth number
ANGLE of BLADE from long axis of shaft
12 or 14
wheel bur
1/16-11
round bur
34
inverted cone
55 (50 series)
plain straight fissure
169
plain tapered fissue
556 (550 series)
crosscut straight fissure
699
crosscut tapered fissure
330
pear shaped
1156
dome end straight fissure
red band
carbide finishing bur
soflex disc colors
red - course
orange - med
light orange - fine
yellow - SUPER fine
rake face
TOWARDS direction of cutting (inside of a wave)
clearance face
AWAY from direction of cutting (outside of a wave)
