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Operative > Dental Caries and Classification > Flashcards

Dental Caries and Classification Flashcards

1
Q

A multifacorial infectious disease that attacks teeth by certain bacteria if the conditions are permissible, causing destruction (demineralization/ dissolution) of the tooth

A

dental caries (C)

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2
Q

stages of caries

A

A. incipient (reversible); just started, can remineralize
B. small (operative1); in the enamel, just started into DEJ
C. moderate- into the dentin
D. extensive- reparative dentin is being made from the pulp

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3
Q

caries classification by location

A
  • pit and fissure caries
  • smooth surface caries
  • root surface caries
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4
Q

pit and fissure caries…

A

pits and fissures on the occlusal surfaces of posterior teeth, buccal and lingual surfaces of molars, lingual surfaces of maxillary anterior teeth

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5
Q

smooth surface caries…

A

on the surfaces that are “pit and fissure” free

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6
Q

root surface caries

A

more in elderly, follows an advanced gingival recession

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7
Q

caries classification by rate

A

active, arrested, recurrent/secondary caries

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8
Q

rampant (acute) caries

A

rapidly invading, softer lesions

ex: nursing bottle caries, radiation caries, meth mouth

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9
Q

chronic caries

A

type of active caries; slow, long standing, dark in color and so there is a good chance of remineralization in early stages (reverse the demineralization process)

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10
Q

arrested caries

A

not showing any further progression; smooth and polished like surface

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11
Q

recurrent/secondary caries

A

caries under a preexisting faulty restoration

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12
Q

Class I caries

A

Pits and fissures of: occlusal surfaces of premolars and molars; buccal or lingual pits/fissure of the molars; lingual pit near the cingulum of the maxillary incisors.

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13
Q

Class II

A

Involving the proximal surfaces (mesial and distal) of premolars and molars; smooth surface posterior teeth

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14
Q

class III

A

proximal (mesial and distal) surfaces of incisors and canines

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15
Q

class IV

A

proximal surfaces of incisors and canines, but also will involve the incisal edge (due to trauma)

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16
Q

Class V

A

gingival third (the area near the gingiva) of the facial or lingual surfaces of any tooth

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17
Q

Class VI

A

Involve the incisal edges of anterior teeth and the cusp tips of posterior teeth; Carious lesions are rare

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18
Q

according to GV Black, the ____ of the lesion dictated the ____ of the cavity preparation

A

location; design

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19
Q

fundamental concepts for all tooth preparation

A

1- removal of dental caries
2- removal of weak tooth structure to provide well supported, sound hard tissue
3- pulp protection

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20
Q

healthy state is reestablishing…

A
  • tooth not diseased anymore
  • normal form and function
  • esthetically pleasing where indicated (anterior zone of oral cavity)
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21
Q

junction of two surfaces

A

line angles

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22
Q

junction of three surfaces

A

point angle

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23
Q

cavity walls that extend to the outer tooth surface

A

external walls

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24
Q

cavity walls that do not extend to the outer tooth surface

A

internal walls

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25
Q

cavity walls according to the proximity to the external surface

A

internal and external walls

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26
Q

cavity walls according to the angulation from the long axis

A

axial walls and perpendicular walls

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27
Q

cavity walls parallel to the long axis

A

axial walls

28
Q

cavity wall perpendicular to the long axis

A

pulpal wall

29
Q

axial and pulpal walls are _____ walls

A

internal

30
Q

isthmus of a class I preparation

A

the narrowest portion of the cavity preparation

31
Q

isthmus of a class II prep

A

a portion of the cavity connecting an occlusal portion and a proximal portion together

32
Q

in class I cavity preps, the isthmus connects the two _____

A

dovetails

33
Q

dovetail design includes:

A

each marginal fossa and the developmental grooves around the marginal pits

34
Q

the junction between the external walls of the cavity prep and the uncut tooth surface

A

cavosurface angle

35
Q

6 principles of cavity preparation

A
  1. outline form
  2. resistance form
  3. retention form
  4. convenience form
  5. finishing
  6. debridement
36
Q

the shape of the cavity prep; perimeter of the tooth preparation in width, length, and depth

A

outline form

37
Q

factors governing outline form:

A
  • conservation of tooth structure
  • location and the extent of the carious lesion
  • position of pit and fissure dictate the outline
38
Q

two outline form approaches

A

extension for prevention and conservative approach

39
Q

extension for prevention

A

Extensive tooth preparation; Unnecessary loss of healthy tooth structure

40
Q

conservative approach

A

Preservation of the remaining tooth structure; minimal extension of the outline form

41
Q

the entire carious area should be removed and ____

A

any weak enamel

42
Q

___ more conservative than _____

A

composite; amalgam

43
Q

Place ____ on sound strong tooth structure…unsupported enamel is removed

A

margins (cavosurface margin)

44
Q

Resistance form: design features of cavity prep to allow remaining tooth structure and the restoration to withstand _____

A

forces that are principally directed towards the long axis of the tooth

45
Q

Primary resistance:

A

1- removal of undermined surface enamel
2- flat pulpal floor and cavity wall angulation
3- cavity prep depth
4- well defined rounded internal line angles
5- type of restorative material

46
Q

cavosurface margin should not terminate on ____ or ____ to prevent its fracture

A

unsupported or undermined (weakened) enamel

47
Q

_____ results in rotation of the restoration (micromovement) that results in a wedging effect on the supporting dentin bridge

A

cup shaped cavity

48
Q

should have a ____ cavity in which the pulpal floor is perpendicular to the ____ of the tooth

A

box shaped; long axis

49
Q

adequate depth is needed to provide enough _____ to prevent its fracture under load

A

thickness of amalgam

50
Q

minimum amalgam thickness to withstand forces:

A

1.5 mm

51
Q

well defined rounded internal line and point angles:

A
  • placing line angles to delineate the walls
  • sharp line angles are not recommended in any restoration
  • sharp line angles act as stress concentration areas
52
Q

amalgam has a low ____, thus amalgam ____ is of prime importance

A

edge strength; margin

53
Q

cavosurface margin has to establish a _____ amalgam margin

A

90 degree (butt-joint margin)

54
Q

reinforcement of the amalgam restoration at the margin by maintaining an angle of ____

A

80-90 degrees

55
Q

retention form: design features of the cavity prep that prevent ____ of the restoration by ____ or ____ forces

A

dislodgement; lifting; tipping

56
Q

amalgam does not bond to tooth structure, thus increasing the ____ of the walls that contact the amalgam, increasing _____

A

surface area; friction

57
Q

retention form: making opposing walls ____ or slightly ____ toward the _____

A

parallel; converging; occlusal

58
Q

convenience form: sufficient access to the cavity, to facilitate ____ and ____ of the cavity prep and the insertion of the restorative material

A

visibility; instrumentation

59
Q

____ for complete removal of decay

A

visibility

60
Q

the diameter of the small end of the smallest condenser should fit passively into the prepared cavity; aka the ____ should be at least ___ mm

A

isthmus; 1.0

61
Q

finishing: finishing the ____ to prevent ___ or ____ outline

A

cavosurface margin (enamel margin); jagged; rough

62
Q

finishing to achieve the best ____

A

marginal seal

63
Q

the final step before the cavity prep receives the restoration

A

debridement

64
Q

rinsing the cavity is done with ____ and _____ to remove debris and wash away dentinal shavings (smear layer)

A

air/water spray syringe; high suction evacuation

65
Q

want to free cavity from ____ caused by ____

A

moisture; blood and saliva

Operative (7 decks)

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