Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Direct Restoration > Fall Lecture: Pulp protection Therapy: Sealers, Liners, and Bases > Flashcards

Fall Lecture: Pulp protection Therapy: Sealers, Liners, and Bases Flashcards

1
Q

Pulp protection therapy:

A

tx that maintains pulp tissue in healthy and functional state whenever pulp has been exposed by caries, trauma, or restorative procedures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

3 types of pulpal irritants:

A

microbial, mechanical, chemical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ex’s of microbial irritants:

A

dental caries, perio disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Ex’s of mechanical or physical irritants:

A

incorrectly ortho tx, drilling, periodontal curettage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Degree of pulpal reaction depends upon:

A

friction and desiccation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Frictional heat from tooth prep can lead to:

A

burn lesions, abscess

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Chemical irritants that can damage pulp:

A

filling materials, medicines to desensitize, dehyrate, or sterilize dentin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Goal of pulp protection therapy:

A

thermal, mechanical, chemical and electrical protection, sealling of dentinal tubules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Characteristics of ideal pulp protecting agent:

A

bio/chem compatible, non-permeable barrier on cut dentin, no effect on bulk or mech props of resto, no discoloration of tooth or resto material, sets fast enough for final resto to be completed quickly enough, low solubility in oral “builds”, ease of use during mixing and insertion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

This provides the best pulpal protection:

A

dentin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Thickness of dentin to provide more than 90% of pulpal protection:

A

2mm +

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Thickness of dentin to provide 90% of pulpal protection:

A

1mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Thickness of dentin to provide 75% of pulpal protection:

A

0.5mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Greatest damage to pulp will result in remaining dentinal thickness (RDT) of:

A

0.25 to 0.3mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When to use sealers, liners, and bases:

A

moderate carious lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When to use pulp capping, either direct or indirect:

A

deep carious lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Cavity selares provide:

A

protective coating, leakage barrier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

2 types of sealers:

A

varnishes and adhesive sealers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Varnish:

A

natural rosin or copal gum or synthetic resin, dissolved in organic solvent, acetone, chloroform, or ether

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Adhesive sealers provide:

A

sealing and bonding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Solid component of varnish:

A

copal resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Solvent component of varnish:

A

ether, acetone, alcohol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Indications for varnish:

A

Under amalgam: all walls and margins, prevents sensitivity and discoloration, zinc phosphate cement: pulpal flood, prevent acid penetration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Contraindications of varnish:

A

under GIC: no thermal protection, prevents adhesion to tooth, under resin restos, residual monomer will dissolve varnish, water soluble

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Adhesive sealers:

A

multi-substrate bonding, bonds resto to tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Ex’s of adhesive sealers:

A

adhesive bonding agents, glass ionomers, resin luting cements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

indications for use of adhesive sealers:

A

treat/prevent hypersensitivity, seal dentinal tubules, under all indirect restorations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Types of liners:

A

cement or resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

how thick are liners?

A

usually less than 0.5mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Function of liners:

A

barrier to bacteria/ byproducts, therapeutic effect, such as antibacterial or pulpal anodyne (pain relieving) effect, fluoride release

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Walls of prep to which liners are applied:

A

pulpal floor only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

4 types of liners:

A

CaOH2, ZOE, glass ionomer Type 3, flowable composite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Base:

A

goes over liner (check)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

2 types of calcium hydroxide cements::

A

self or light curing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Which has better mechanical props. light or self curing?

A

light, VLC dycal, polyphenolics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Advantages of CaOH2:

A

activates ATPse leading to dentin mineralization, stimulates reparative dentin *formation, biocompatible, pH of 12.5, neutralizes acidity/ bacterialcidal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Disadvantages to CaOH2

A

low stegnth, high solubility, dissolves rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Function of glass ionome over the CaH2 liner:

A

support resto

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Type I glass ionomer:

A

luting cement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Type II glass ionomer:

A

Restoration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Type III glass ionomer:

A

Liners and Bases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Type IV glass ionomer:

A

Fissure sealants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Type V glass ionomer:

A

ortho cements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Type VI glass ionomer:

A

Core builup

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

List the 6 types of glass ionomers:

A

luting, restos, liners and bases, fissure sealant, ortho cement, core buildup

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Glass ionomer type used for pulp protection:

A

type 3, powder:aluminum silicate glass, liquid: polyalkenote acid, light cure resin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Best option for composite restos:

A

GIC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Advantages of GI Type III:

A

adhesive to tooth, anticariogenic, semi translucent, fluoride release

49
Q

DisAdvantages of GI Type III:

A

water sorption causes leakage and discoloration, low wear or abrasion resistance

50
Q

Composites with lower filler content:

A

flowable

51
Q

Properties of flowable composite:

A

more fluid, less strength, less stiffness

52
Q

What is a base?

A

replace missing dentin, used for bulk and/or for blocking out undercuts in preps for indirect restorations.

53
Q

Usual thickness for base:

A

0.5 to 1mm

54
Q

Classifications of bass:

A

high and low strength

55
Q

High strength bases:

A

zinc phosphate, zinc polycarboxilate, glass ionomer (type III), reinforced ZOE

56
Q

Low strength bases:

A

CaOH2, ZOE

57
Q

Functions of a base:

A

chem insulator, thermal insulator at 0.75mm thickness, mechanical support to resto, distributes stress to underlying dentin

58
Q

oldest luting cement:

A

zinc phosphate

59
Q

Gold (?) standard to which newer cements are compared:

A

zinc phosphate

60
Q

Advantages to zinc phosphate:

A

good mechanical props, thermail insulation

61
Q

Disadvantages to zinc phosphate

A

does not adhere to tooth structure, exothermic reaction at initial setting that can damage pulp, opaque, not esthetic, dissolves in OC, acidic in nature

62
Q

Composition of powder portion of reinforced ZOE:

A

zinc oxide and natural or synthetic resin

63
Q

Composition of liquid portion of reinforced ZOE:

A

eugenol, acetic acid, thymol

64
Q

Props of ZOE:

A

stronger than regular zinc oxide cements, less pulpal irritation, anodyne effect on pul[

65
Q

When to remove sound tooth structure to provide space for base,

A

never

66
Q

Benefits of maintaining sound dentin:

A

better support and pulpal protection

67
Q

Uses of bases for indirect restos:

A

build up and block out materials for cementing indirect restos

68
Q

What to be aware of when using base under amalgam or resin restos:

A

minimize extent of base

69
Q

How much liner to use:

A

minimum thickness to achieve desired result

70
Q

Pulp protection therapy to use when there is more than 2mm dentin thickness for amalgam resto:

A

varnish

71
Q

Pulp protection therapy to use when there is more than 2mm dentin thickness for composite resto:

A

dentin bonding agent

72
Q

Pulp protection therapy to use when there is more than 2mm dentin thickness for glass ionomer resto:

A

none

73
Q

Pulp protection therapy to use when there is more than 2mm dentin thickness for cast gold resto:

A

none

74
Q

Pulp protection therapy to use when there is 0.5mm-2mm dentin thickness for amalgam resto:

A

base

75
Q

Pulp protection therapy to use when there is 0.5mm-2mm dentin thickness for composite resto:

A

dentin bonding agent

76
Q

Pulp protection therapy to use when there is 0.5mm-2mm dentin thickness for glass ionomer resto:

A

none

77
Q

Pulp protection therapy to use when there is 0.5mm-2mm dentin thickness for cast gold resto:

A

base

78
Q

Pulp protection therapy to use when there is less than 0.5mm dentin thickness for amalgam resto:

A

CaOH2 and GIC

79
Q

Pulp protection therapy to use when there is less than 0.5mm dentin thickness for composite resto:

A

CaOH2 and GIC

80
Q

Pulp protection therapy to use when there is less than 0.5mm dentin thickness for glass ionomer resto:

A

CaOH2

81
Q

Pulp protection therapy to use when there is less than 0.5mm dentin thickness for cast gold resto:

A

CaOH2 + base

82
Q

TF? both direct and indirect pulp capping use the same 3 layers: CaOH2, GI, and resto material.

A

T

83
Q

indirect pulp capping;

A

not DIRECTLY touching pulp

84
Q

direct pulp capping:

A

direct contact with inner pulp

85
Q

Pulp capping can be done if:

A

vital pulp, no spontaneous pain, hot/cold pulp testing pain does not linger after stimulus removal, PA with no evidince of periradicualr lesion, bacteria excluded from a site by the resto

86
Q

2 major factors affect pulpal response to irritants:

A

rate of caries attack, pulp vitalty

87
Q

This type of lesion forms more reactionary/ tertiary dentin:

A

small or slowly progressing

88
Q

This type of lesion leads to inflammation or necroses;

A

rapidly progressing

89
Q

Which forms more reactionary dentin and why, young or old?

A

Young, more blood supply

90
Q

3 defense reactions of pulp:

A

tubular sclerosis, tertiary reparative (osteo) dentin formation, pulp inflammation

91
Q

When will reactionary dentin form after pulpal insult?

A

mild injury, primary odontoblasts survive

92
Q

Appearance of reactionary dentin:

A

tubular pattern, resembles primary dentin

93
Q

Tubular sclerosis:

A

process in which minerals deposited witiin the dentinal tubules, reducing the permeability to bacteria and toxic products

94
Q

When is 3’ dentin formed:

A

response to various irritants, ie trauma or caries

95
Q

Where is 3’ dentin formed?

A

dentin/pulp interface, area directly beneath stimulus

96
Q

How does 3’ dentin provide extra protection to pulp?

A

by increasing the distance bw them and injurious stimuli

97
Q

Direct pulp capping:

A

small pulpal exposure, sound surrounding dentin, dressed with appropriate biocompatible radiopaque base in contact w exposed pulp tissue prior to placing a final reso

98
Q

Goals of direct pulp capping:

A

pulp vitality and function, normal response to electrical and thermal stimuli, formation of 2’/reparative dentin (check), no prolonged post-op pain or swelling, no pathological changes

99
Q

indications of direct pulp capping:

A

easily controlled/light bleeding that can be stopped by cotton pellet, traumatic exposure in a dry, clean field, reported to dentist w/in 24h, small pin point exposure surrounded by sound dentin during mech prep of cavity

100
Q

Contraindications for direct pulp capping:

A

systemic disease (diabetes, cancer), primary teeth w root resorption, pre-op tooth sensitivity, large pulp exposure, Rg changes, uncontrolled bleeding, non restorable tooth or restorable with low prognosis, tooth mobility, swelling and fistula

101
Q

Direct capping px:

A

lidocaine, isolate, remove decay, pinpoint exposure then, control bleeding with saline, chlorhexidine, or HOO2, gently fry, CaOH2 directly on exposed pulp, GIC liner, restore w composite or amalgam, 6wk follow up

102
Q

Inner “affected” dentin:

A

few bacteria, remineralizable, intermittently demineralized, vital, sensitive, can be left unexcavated (basis of indirect pulp capping)

103
Q

Outer “infected” dentin:

A

bacterial invasion, unmineralizable, dead, wo sensation, highly demineralized, superficial layer, deteriorated collagen fibers, should be excavated

104
Q

Goals of indirect pulp capping:

A

resto mat should seal involved dentin from OC, vitality of tooth preserved, no post-op pain and swelling, no 3’ o reparative dentin should be evident on RG after 6 to 12 wks, no evidence of internal resorption

105
Q

Indications of indirect pulp capping:

A

minimal pulpal inflammation, complete removal of caries would lead to pulp exposure, mild pain assoc with eating, no spontaneous, extreme pain, no mobility, no PA radiolucency

106
Q

Contraindications of indirect pulp capping:

A

pulpal or PA pathology, soft, leathery dentin covering all area of cavity, pain lingering after removal of stimulus, mobility, discoloration

107
Q

Clinical px for indirect pulp capping:

A

lidocaine, isolation, cavity outline with high speed, remove superficial debris and most soft necrotic dentin (infected) w slow speed and round bur, caries dye, leave hard, leathery dentin, rinse with saline, gently air dry, CaOH2 cement on deepest position of prep, liner covered with GIC and final resto done (amal or comp), 6wk rg follow-up to check for reparative dentin formation

108
Q

Multi-visit indirect pulp capping px:

A

after CaOH2 liner and cement, interim resto, after 6wk RG exam for reparative dentin formation, lidocaine, isolation, re-enter remove remaining caries, place final resto

109
Q

6 pulp capping materials:

A

ZOE, CaOH2, MTA (mineral trioxide aggregate), glass ionomer, resin modified glass ionomer, adhesive systems

110
Q

Props of ZOE cements:

A

germicidal, palliative, tight initial seal, arrest caries process

111
Q

Affect of CaOH2 on bacteria:

A

initially bactericidal then static

112
Q

Does CaOH2 stimulate reparative dentin?

A

yes

113
Q

CaOH2, high or low toxicity?

A

low

114
Q

Effect of CaOH2 on internal resorption:

A

stops it

115
Q

Contraindications fr CaO2:

A

does not bond to tooth, degrades acid etching, not enough mech strength to withstand condensation pressure under amal resto, dissolves in oral “builds” (fluids?)

116
Q

Indications for mineral trioxide aggregate:

A

adheres to tooth, stimulates reparative dentin better and faster than CaOH2, biocompatible, low cytotoxicity, better marginal seal, good mech strength, antibacterial

117
Q

Contraindications for MTA:

A

gray color, 2 to 4 hr setting time, expensive, high solubility

118
Q

Benefits of GIC:

A

better bacterial seal, fluoride release chem bond to tooth and resin cement

119
Q

Props of adhesive systems:

A

complete marginal seal, prevents bacterial invasion, allows pulp repair

Direct Restoration (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions