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

Module 20 ch. 21/44 Flashcards

1
Q

Discolorations of teeth happen in what 3 ways

A

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

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2
Q

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

A

external

may

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3
Q

Intrinsic stains occur ______ substance and _____ be removed.

A

inside tooth

cannot

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4
Q

What stains develop from sources outside the tooth.

A

Exogenous

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5
Q

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

A

within

intrinsic

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6
Q

Yellow stain is associated with?

A

biofilm

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7
Q

_____ stain has demineralization underneath it and _____ be scaled

A

Green

shouldn’t

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8
Q

Green stain is mostly found on what surfaces

A

facial cervical 1/3 of MX anterior tooth

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9
Q

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

A

uncleanliness
chromogenic
hemorrhage

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10
Q

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

A

Black-Line

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11
Q

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

A

gingiva

1mm

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12
Q

Black-Line stain is most frequently on what surfaces

A

lingual/proximal of maxillary posterior

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13
Q

Black Line stain is more commonly found in _____

A

females

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14
Q

What stain appears light brown to dark leathery.

A

Tobacco stain

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15
Q

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

A

light brown

yellowish

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16
Q

What chemotherapeutics can cause brown stain

A

Chlorhexidine

Alexidine

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17
Q

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

A

Betel Leaf

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18
Q

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

A

Endogenous Intrinsic

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19
Q

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

A

Tetracycline

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20
Q

What color is tetracycline stain

A

light green to dark yellow

gray-brown

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21
Q

Color of tetracycline stain depends on?

A

dosage
length of time used
type of tetracycline

22
Q

Defective tooth development may result from ____ abnormality or ______ influences

A

genetic

environment

23
Q

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

A

Dentinogenesis imperfecta

24
Q

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

A

Amerlogenesis imperfecta

25
Q

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

A

Enamel Hypoplasia

26
Q

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

A

Exogenous Intrinsic

27
Q

What types of exogenous stains can become Intrinsic

A

Tobacco

Green

28
Q

Polishing procedures can interrupt enamel _____

A

remineralization

29
Q

Can you use polishing agents on restorative materials?

A

NO

30
Q

What are the rules for using polishing agents

A

Light Pressure

Moist Agent

31
Q

Is stain removal recommended after gingival and periodontal treatments?

A

NO

32
Q

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

A

tooth paste

33
Q

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

A

hardness
shape
applied

34
Q

Enamel
Dentin
Cementum
MOHS Hardness values

A

5

  1. 0-4.0
  2. 5-3.0
35
Q

__ shaped particles produce deeper grooves

A

irregular

36
Q

Many abrasives used are _ times harder than tooth surface

A

10

37
Q

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

A

more

38
Q

smaller particles are _____ abrasive

A

less

39
Q

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

A

wet
low
light

40
Q

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

A

90

41
Q

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

A

orthodontic
bridges
interproximal

42
Q

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

A

bristle

43
Q

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

A

circular
4
5

44
Q

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

A

gingiva

90

45
Q

What is the MOHS hardness for Sodium Bicarbonate

A

2.5

46
Q

Advantages of air-powder polishing

A

less time
ergonomically favorable
generates no heat

47
Q

For anterior teeth the nozzle is at a ____ degree angle

A

60

48
Q

For posterior teeth the nozzle is at an ___ degree angle

A

80

49
Q

Air-powder polishing is contraindicated for patients with?

A 
sodium restricted diet
respiratory diseases (COPD)
End-stage renal disease (Addisons/Cushings)
Communicable infections
Immunocompormised patients
50
Q

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

A

composite
non-metallic
pitting

Dental Hygiene 1 (26 decks)

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