Principles of Instrumentation

Question 1

Fulcrum=

Answer 1

Finger rest

Question 2

Adaptation=

Answer 2

Rotation or rolling

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

Question 3

Place the terminal shank _____ to the surface to be instrumented

Answer 3

Parallel

Question 4

______ of tip adapted to conform to contour of surface

Answer 4

Side

*not middle or toe/tip

Question 5

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

Answer 5

Distal, mesial

Question 6

Scaler and curette surfaces:

Answer 6

Face, back, laterals, 2 CE’s

Question 7

The shank-

Answer 7

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

Question 8

_______ of the shank reflect the intended use of the instrument

Answer 8

Design features

Question 9

Diameter of instrument plays a role in ____ _____

Answer 9

Deposit removal

Question 10

Thick diameter for ______

Answer 10

Heavier deposit

Question 11

Thinner diameter for _______

Answer 11

Light deposit, root surface debridement

Question 12

Rigidity is determined by ______

Answer 12

The shank

Question 13

Grasp=

Answer 13

Stabilization

Question 14

Long shank are for ______ teeth

Answer 14

Posterior

Question 15

Shorter shank for _______ teeth

Answer 15

Anterior

Question 16

Straight shank=

Answer 16

Simple shank

Question 17

Multiple bends in shank=

Answer 17

Complex shank

Question 18

Terminal shank=

Answer 18

KEY POINT

Question 19

Portion of the shank closest to the blade

Answer 19

Terminal shank

Question 20

Part which contacts tooth that does the work

Answer 20

Working end

*sharp cutting edge

Question 21

Cross sectional shapes:

Answer 21

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

Question 22

Tips:

Answer 22

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

Question 23

Back:

Answer 23

Angled/point- slightly sub

Rounded- meant to go deep in tissues

Question 24

Working end ____ be perpendicular to the shank _____ degrees

Answer 24

May, 90

Question 25

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

Answer 25

60-70 degrees

Question 26

Blade size refers to ____ and _____

Answer 26

Width and thickness

Width- from cutting edge to cutting edge

Thickness- from face to back

Question 27

Scalers are:

Paired or unpaired?

Answer 27

Unpaired

Question 28

Scaler design features:

Answer 28

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

Question 29

Curette design features:

Answer 29

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

Question 30

Gracey curette design features:

Answer 30

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

Question 31

Advantages of gracey curettes

Answer 31

Specific surfaces
Longer shank
Round back
Incidental curettage

Question 32

Universal curette

design features:

Advantages:

Answer 32

90 degrees to terminal shank and face
Each end has 2 CE’s
Each end mirror images to each other
Rigid shank

Less time because used everywhere

Question 33

Instruments for detection and assessment

Answer 33

Explorer and probe

Question 34

Instruments for scaling and root debridement

Answer 34

Scaler and curette

Question 35

Working angulation (sub and supra)

Answer 35

60-80 degrees

Question 36

Stroke directions

Answer 36

Vertical or oblique