Principles of Instrumentation Flashcards

(36 cards)

1
Q

Fulcrum=

A

Finger rest

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2
Q

Adaptation=

A

Rotation or rolling

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

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3
Q

Place the terminal shank _____ to the surface to be instrumented

A

Parallel

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4
Q

______ of tip adapted to conform to contour of surface

A

Side

*not middle or toe/tip

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5
Q

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

A

Distal, mesial

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6
Q

Scaler and curette surfaces:

A

Face, back, laterals, 2 CE’s

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7
Q

The shank-

A

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

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8
Q

_______ of the shank reflect the intended use of the instrument

A

Design features

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9
Q

Diameter of instrument plays a role in ____ _____

A

Deposit removal

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10
Q

Thick diameter for ______

A

Heavier deposit

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11
Q

Thinner diameter for _______

A

Light deposit, root surface debridement

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12
Q

Rigidity is determined by ______

A

The shank

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13
Q

Grasp=

A

Stabilization

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14
Q

Long shank are for ______ teeth

A

Posterior

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15
Q

Shorter shank for _______ teeth

A

Anterior

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16
Q

Straight shank=

17
Q

Multiple bends in shank=

A

Complex shank

18
Q

Terminal shank=

19
Q

Portion of the shank closest to the blade

A

Terminal shank

20
Q

Part which contacts tooth that does the work

A

Working end

*sharp cutting edge

21
Q

Cross sectional shapes:

A

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

22
Q

Tips:

A

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

23
Q

Back:

A

Angled/point- slightly sub

Rounded- meant to go deep in tissues

24
Q

Working end ____ be perpendicular to the shank _____ degrees

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 ```
31
Advantages of gracey curettes
Specific surfaces Longer shank Round back Incidental curettage
32
Universal curette design features: Advantages:
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
33
Instruments for detection and assessment
Explorer and probe
34
Instruments for scaling and root debridement
Scaler and curette
35
Working angulation (sub and supra)
60-80 degrees
36
Stroke directions
Vertical or oblique