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dental assisting mda > Plaque, Stains, & Coronal Polish > Flashcards

Plaque, Stains, & Coronal Polish Flashcards

1
Q

what is acquired pellicle

A

amorphous, acellular, organic tenacious membrane.

Develops on tooth immediately after plaque is removed - barrier

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2
Q

Bacterial colonization on tooth surface, a non mineralized mass is known as

A

plaque

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3
Q

Mucin

A

protein in saliva that breaks down sugars to create plaque

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4
Q

how long does it take fresh plaque to form

A

12-24 houra

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5
Q

after 24-48 hours of plaque being left it is known as

A

mature plaque

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6
Q

the pathogenicity (strength) of plaque is determined by

A

the age of plaque - older it gets the more acidic it becomes making it hard to remove

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7
Q

after leaving plaque for 14-21 days what will be evident in the gums

A

gingivitis

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8
Q

what is the pH of plaque prior to eating

A

6.2-7.0 (neutral)

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9
Q

acitomycete is an acid bacteria present in which form of carie’s

A

root caries

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10
Q

cariogenic plaque

A

harbours bacteria that leads to caries

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11
Q

calculogenic plaque

A

provides a matrix for mineralization

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12
Q

where is plaque most likely to form

A

crowding, rough surfaces, overhangs, pits and fissures

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13
Q

a clean tooth with less retention for plaque will appear how

A

smooth and shiny - reflecting light

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14
Q

higher pH = ___

A

less acidity

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15
Q

what is calculus constantly covered by

A

actively metabolizing bacteria

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16
Q

what is a side effect if supragingival plaque build up

A

carie’s and gingivitis

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17
Q

indications of polishing

A
  • prior to sealants placement
  • prior to ortho bands and crowns/bridges
  • stains present
  • before acid etch application
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18
Q

contraindications of polishing

A
  • no stains present
  • root or cementum exposure
  • high risk of carie’s or incipient lesion present
  • sensitive teeth
  • newley erupted teeth
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19
Q

what is the purpose of polishing

A

to remove extrinsic stains and soft plaque

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20
Q

what type of grasp is used when polishing and what kind of strokes

A

modified pen grasp

short intermittent and overlapping strokes

21
Q

how long should be spent max on each tooth

A

3-5 seconds

22
Q

rpm’s of handpiece should not exceed how many when polishing

A

10,000

23
Q

what speed to prophy angles run at

A

5,000 rpm

24
Q

what is the most abrasive material for polishing

A

flour of pumice

used for heavy stains and prior to sealants

25
Q

Calcium carbonate is used for ____ and is most common in what

A

light to medium stains

most common in prophy pastes and toothpaste

26
Q

what type of abrasive is used for amalgam

A

tin oxide - very fine abrasive that is versatile for all restorations

27
Q

what abrasive is used to polish gold/metal alloys

A

rouge

28
Q

what is added to abrasives to reduce frictional heat

A

a wetting agent

29
Q

what is the rubber point prophy cup used for

A

to polish interproximal

30
Q

what step comes after polishing is finished

A

flossing

31
Q

what is epidemiology

A

the science of dealing with transmission and control of disease

32
Q

amalayze is the

A

enzyme within the mouth and pancreas’s to break down sugars

33
Q

why are plaque index’s used

A

to evaluate level of plaque in the cervical area

34
Q

what is calculus composed of

A

calcium, phosphorus and sodium

calculus is amorphous meaning it has no definite shape

35
Q

lack of mastication, drugs, open bites, dialysis and poor hygiene are all factors that contribute to

A

rate and amount of calculus build up

36
Q

chromogenic picgmentation of a stain refers to the

A

origin of its color

37
Q

plaque that turns red after disclosing means it is

A

new and thin plaque

38
Q

when would you avoid using a disclosing agent

A

on tooth coloured restorations or before a sealant

39
Q

how is the type of staining classified

A

by location and source

40
Q

exogenous stains are originating from a

A

outside source such as tobacco, food

41
Q

exogenous stains can be either

A

intrinsic or extrinsic

42
Q

endogenous stains originate from

A

within the tooth structure

-birth defects, developmental defects

43
Q

can endogenous stains be extrinsic or intrinsic

A

no they can only be intrinsic

44
Q

extrinsic stains __ be removed

A

can be

45
Q

intrinsic stains ___ be removed

A

cannot be

46
Q

what is the best pH for oral biofilm

A

high pH - less acidic

47
Q

what is the ideal stroke for polishing

A

short intermittent overlapping strokes

48
Q

properties of an acceptable disclosing agent

A 
color intensity
length of intensity
taste
diffusability
Muscosal irritation
49
Q

what’s the difference between coronal polish and oral prophylaxis

A

polish only removes stains and plaque, prophylaxis also removes calculus

dental assisting mda (35 decks)

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