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
