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Flashcards in Principles of Instrumentation Deck (36)
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1

Fulcrum=

Finger rest

2

Adaptation=

Rotation or rolling
*keeping the SIDE of the last 2mm of the working end on the tooth

3

Place the terminal shank _____ to the surface to be instrumented

Parallel

4

______ of tip adapted to conform to contour of surface

Side

*not middle or toe/tip

5

Tip should be pointed in the direction of the stroke; pointed distally if going ____, mesial if going _____

Distal, mesial

6

Scaler and curette surfaces:

Face, back, laterals, 2 CE's

7

The shank-

Connects the handle with the working end. Allows for adaptation of the working end to the tooth surface; may be angles, curved, or straight.

8

_______ of the shank reflect the intended use of the instrument

Design features

9

Diameter of instrument plays a role in ____ _____

Deposit removal

10

Thick diameter for ______

Heavier deposit

11

Thinner diameter for _______

Light deposit, root surface debridement

12

Rigidity is determined by ______

The shank

13

Grasp=

Stabilization

14

Long shank are for ______ teeth

Posterior

15

Shorter shank for _______ teeth

Anterior

16

Straight shank=

Simple shank

17

Multiple bends in shank=

Complex shank

18

Terminal shank=

KEY POINT

19

Portion of the shank closest to the blade

Terminal shank

20

Part which contacts tooth that does the work

Working end

*sharp cutting edge

21

Cross sectional shapes:

Half moon, half circle- curette
Triangular- scaler
Cylindrical- probe
Trapezoid- file, hose, chisel

22

Tips:

Blunt- probe
Sharp pin point- explorer
Rounded toe- curette

23

Back:

Angled/point- slightly sub
Rounded- meant to go deep in tissues

24

Working end ____ be perpendicular to the shank _____ degrees

May, 90

25

May be offset at an angle to the shank: _____ degrees

60-70 degrees

26

Blade size refers to ____ and _____

Width and thickness

Width- from cutting edge to cutting edge

Thickness- from face to back

27

Scalers are:

Paired or unpaired?

Unpaired

28

Scaler design features:

Pointed tip
Triangle cross section
C-sickle or jacquette
2 cutting edges
90 degree shank

29

Curette design features:

2 CE's
1/2 moon
60-70 degree gracey, 90 universal
Rounded toe- sub
Looks like spoon to scoop up debris
All paired

30

Gracey curette design features:

60-70 degree to terminal shank
1 useful cutting edge
Area specific
Shanks=long rigid, flexible
Curved in 2 places, length wise and to side