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Flashcards in Exam 2 Deck (71)
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1

Used to carry out the purpose and function of the instrument
Blade

Working End

2

A very fine line where surfaces meet

cutting edge

3

Surfaces meet or are continuous to form the back of the instrument

lateral surfaces

4

Connects the working end with the handle

Shank

5

What shape of shanks are for unrestricted areas?

Straight shanks

6

What shape of shanks are for more restricted areas?

Angled shanks

7

Section of the shank adjacent to the blade. It is sometimes elongated to give better access to deeper pockets

Lower or terminal shank

8

Overall design

Handle

9

Has one working end

Single-ended instrument

10

May have paired or complementary working ends

Double-ended instrument

11

Are separable from the shank and working end. They permit instrument exchanges and replacements

Cone socket

12

Hollow handles are lighter and are preferred to solid handles because they have an enhanced tactile sensitivity and lessen fatigue

Weight

13

The ideal instrument for comfort and best tactile sensitivity

Light weight, serrated, hollow handle

14

The school or individual responsible for the design or development

Design name

15

The traditional number used to identify the specific instrument

Design number

16

Gracey after 5's

Shank is 3mm longer
Pocket depths beyond 5mm

17

Treatment sequence of instruments

Explorer
Ultra-Sonic
Scaler
Universal Curet
Area Specific(Gracey's)

18

Curets (in general)

One or two cutting edges on a curved blade
Curved around to meet the toe
Face is flat
Back is rounded
70-80
Shank (Anterior teeth)- flat plane
Shank (Posterior teeth)- angled for access to proximal surfaces

19

Can be adapted on any tooth surface
Face : 90 degree angle
Cutting edge: continuous around the face; used on both sides

Universal curet

20

Designed for adaptation to specific surfaces
Paired mirror image
Face: offset, 70 degree angle
Cutting edge: continuous around the face
Made for deeper pockets

Area Specific

21

Standard instrument made for subgingival scaling and root planning
Blade forms a 70 degree angle with the tooth
Pull stroke only; applied in vertical, horizontal, or oblique directions

Curets

22

Used for subgingival scaling for removal of as much of the calculus as possible

Universal curets

23

What instrument is best for fine scaling and root planning?

Area specific curets

24

What is the design of curets?

Slender shank allows entrance into the sulcus or pocket

Rounded back minimizes possible trauma at the base of the pocket

25

Two cutting edges on a curved blade
Face: Two lateral surfaces form tip of scaler
Cross section: triangle

Curved/Sickle scaler

26

Two cutting edges on a straight blade
Face: flat

Straight/Jacquette scaler

27

Purpose and Uses for Scalers:

Supragingival calculus
Using subgingival can can trauma & risk of scratching the cemental surface is greater
Tactile sensitivity is decreased with larger, heavier blades

70 degree angle
Pull stroke only

28

What is a modified pen grasp?

Holding an instrument between thumb pads and index finger, with the side of the middle finger supporting the shank or placed lower on the handle. The 4th finger is used as a fulcrum.

29

The support, or point of rest, on which a lever turns in moving a body

Fulcrum

30

Objectives of a Finger Rest:

Stability
Unit control
Prevention of Injury (Carpel tunnel)
Comfort for the patient
Control of length stroke