chair side unit 3 (study guide)

what are the hand instrument parts?

handle, shank, working end

what is a bevel on a hand instrument?

an angled surface on a working end - can be single or double

what is the difference between the 3 and 4 number instrument formula?

4 numbered instrument formula has: a degree of cutting edge of the blade to handle

what are the 4 numbered instruments?

angle former chisel and gingival margin trimmer

what instruments are in the basic setup?

mouth mirror, double ended explorer, and cotton pliers

what are the hand cutting instruments used for?

manually removing decayed tooth structure, smoothing cavity walls/floors, and place retention grooves

what instruments are classified as hand cutting instruments?

excavator, hoe, chisel, hatchet, and gingival margin trimmer

what instruments are condensing/insertation instruments?

amalgam carrier, condensers/pluggers, liner applicator, plastic instrument, and composite placement instrument

what re carving instruments used for?

removing excess material and carve anatomy into occlusal restoration before amalgam gets hard

list the carving instruments

• cleoid-discoid

• hollenback carver (walls 1)

• walls 3

• amalgam knife

• amalgam file

what are the polishing and finishing instruments?

burnishers and carvers

what is meant by a cone socket handle?

a hollow instrument handle that allow different working ends to be inserted and placed

what are the slow speed attachments?

straight, contrangle, prophyangle

what is a rheostat?

foot control for handpieces

what is the purpose of a fiberoptic on the handpiece?

better visibility

what type of chuck is in a high speed hand piece?

friction grip

what are the parts of a bur?

head, neck, shank

HP

Lab bur

RA/LA

latch type

FG

friction grip

what is a finishing bur?

• up to 30 flutes

• shallow

• remove “flash”

what is a cutting bur?

• capbide

• 9 basic shapes

• 6-8 flutes

what does an “L” after the bur number indicate?

long head/shank

What does an “SS” indicate?

short shank

what types of rotary instruments are abrasive?

mandrel, discs, stones, and rubber wheels/points

what is a mandrel used for?

holding polishing discs and other slow-speed attachments

what are the types of mandrels?

• screw type

• snap on

• friction grip - high speed

• latch type - low w/contrangle

what type of abrasive rotary instruments are designed to be used once?

sandpaper discs

what are diamond burs used for?

rapid cutting inter proximal surfaces

what is the advantage of using a present tray set up?

save time, organized, and ensure instruments are ready

how are instruments positioned on a tray?

in the order they will be used in during procedures