Module 20 ch. 21/44 Flashcards Preview

Dental Hygiene 1 > Module 20 ch. 21/44 > Flashcards

Flashcards in Module 20 ch. 21/44 Deck (50):
1

Discolorations of teeth happen in what 3 ways

adheres to the surfaces
is in calculus/biofilm
incorporated in tooth/restorative structure

2

Extrinsic Stain occur on the _____ surface and ___ be removed.

external
may

3

Intrinsic stains occur ______ substance and _____ be removed.

inside tooth
cannot

4

What stains develop from sources outside the tooth.

Exogenous

5

Endogenous stains develop _______ the tooth and are always the ______ type

within
intrinsic

6

Yellow stain is associated with?

biofilm

7

_____ stain has demineralization underneath it and _____ be scaled

Green
shouldn't

8

Green stain is mostly found on what surfaces

facial cervical 1/3 of MX anterior tooth

9

Green stain results from oral ____, ____bacteria, and gingival _____

uncleanliness
chromogenic
hemorrhage

10

What stain is highly retentive and forms along the gingival 1/3

Black-Line

11

Black Line Stain follows contour of __ about ___ above the crest

gingiva
1mm

12

Black-Line stain is most frequently on what surfaces

lingual/proximal of maxillary posterior

13

Black Line stain is more commonly found in _____

females

14

What stain appears light brown to dark leathery.

Tobacco stain

15

A ____ sometimes __ stain forms on teeth in pellicle after repeated use of stannous fluoride

light brown
yellowish

16

What chemotherapeutics can cause brown stain

Chlorhexidine
Alexidine

17

What causes a dark mahogany almost black stain and is common in eastern countries

Betel Leaf

18

What type of stains may be related to the period of tooth development.

Endogenous Intrinsic

19

What stain is caused by an antibiotic and can be absorbed by the bones and teeth and can be transferred through the placenta.

Tetracycline

20

What color is tetracycline stain

light green to dark yellow
gray-brown

21

Color of tetracycline stain depends on?

dosage
length of time used
type of tetracycline

22

Defective tooth development may result from ____ abnormality or ______ influences

genetic
environment

23

What hereditary disease is seen when the teeth appear translucent or opalescent

Dentinogenesis imperfecta

24

What hereditary disease is seen when the enamel is partially or completely missing and teeth are yellowish-brown to gray-brown

Amerlogenesis imperfecta

25

_____ is when teeth erupt with white spots or with pits that can discolor

Enamel Hypoplasia

26

What type of stains are inside the tooth but come from an outside source

Exogenous Intrinsic

27

What types of exogenous stains can become Intrinsic

Tobacco
Green

28

Polishing procedures can interrupt enamel _____

remineralization

29

Can you use polishing agents on restorative materials?

NO

30

What are the rules for using polishing agents

Light Pressure
Moist Agent

31

Is stain removal recommended after gingival and periodontal treatments?

NO

32

You should use _____ to polish if no unsightly stain is present

tooth paste

33

The rate of abrasion is controlled by the _ and __ of the particles as well as the manner in which they are _____

hardness
shape
applied

34

Enamel
Dentin
Cementum
MOHS Hardness values

5
3.0-4.0
2.5-3.0

35

__ shaped particles produce deeper grooves

irregular

36

Many abrasives used are _ times harder than tooth surface

10

37

Particles that fracture into smaller sharp-edged particles are _____ abrasive

more

38

smaller particles are _____ abrasive

less

39

You should use ___ agents and apply a rubber polishing cup using ____ speed and _____ touch

wet
low
light

40

You should apply polishing paste at a ___ angle to the tooth

90

41

Rubber polishing points can be used around ____, fixed ___ and in ___spaces

orthodontic
bridges
interproximal

42

What slow speed attachment is used selectively and limited to occlusal surfaces

bristle

43

The air-powder polisher should be kept in a constant ____ motion and _to_mm away from enamel

circular
4
5

44

The spray is angled away from ____ and at a _____degree angle

gingiva
90

45

What is the MOHS hardness for Sodium Bicarbonate

2.5

46

Advantages of air-powder polishing

less time
ergonomically favorable
generates no heat

47

For anterior teeth the nozzle is at a ____ degree angle

60

48

For posterior teeth the nozzle is at an ___ degree angle

80

49

Air-powder polishing is contraindicated for patients with?

sodium restricted diet
respiratory diseases (COPD)
End-stage renal disease (Addisons/Cushings)
Communicable infections
Immunocompormised patients

50

Air-powder polishing can't be done on ____, cements, and other _____ materials because it can cause _____

composite
non-metallic
pitting